From 24540d8d3d0819e7af728d3087bd6ddab4acb17d Mon Sep 17 00:00:00 2001
From: Amandeep Singh <thinkmillptyltd@192-168-1-2.tpgi.com.au>
Date: Fri, 10 May 2019 19:26:24 +1000
Subject: [PATCH 1/4] implemented the CircleRoiTool to draw circle annotations

---
 .all-contributorsrc | 9 +++++++++
 README.md           | 8 +++++---
 2 files changed, 14 insertions(+), 3 deletions(-)

diff --git a/.all-contributorsrc b/.all-contributorsrc
index 57d4b68af..a508c977d 100644
--- a/.all-contributorsrc
+++ b/.all-contributorsrc
@@ -203,6 +203,15 @@
       "contributions": [
         "doc"
       ]
+    },
+    {
+      "login": "singhArmani",
+      "name": "Amandeep Singh",
+      "avatar_url": "https://avatars2.githubusercontent.com/u/11068601?v=4",
+      "profile": "https://github.com/singhArmani",
+      "contributions": [
+        "content"
+      ]
     }
   ],
   "contributorsPerLine": 7
diff --git a/README.md b/README.md
index 1b386aa74..03ce76c95 100755
--- a/README.md
+++ b/README.md
@@ -12,7 +12,7 @@
 <!-- prettier-ignore-start -->
 [![Build Status][build-badge]][build]
 [![Coverage Status][coverage-badge]][coverage]
-[![All Contributors](https://img.shields.io/badge/all_contributors-19-orange.svg?style=flat-square)](#contributors)
+[![All Contributors](https://img.shields.io/badge/all_contributors-20-orange.svg?style=flat-square)](#contributors)
 
 [![NPM version][npm-version-image]][npm-url]
 [![NPM downloads][npm-downloads-image]][npm-url]
@@ -146,8 +146,10 @@ Thanks goes to these people ([emoji key][emojis]):
 
 <!-- ALL-CONTRIBUTORS-LIST:START - Do not remove or modify this section -->
 <!-- prettier-ignore -->
-<table><tr><td align="center"><a href="https://www.linkedin.com/in/chafey"><img src="https://avatars2.githubusercontent.com/u/1268698?v=4" width="100px;" alt="Chris Hafey"/><br /><sub><b>Chris Hafey</b></sub></a><br /><a href="https://github.com/cornerstonejs/cornerstoneTools/commits?author=chafey" title="Documentation">📖</a> <a href="https://github.com/cornerstonejs/cornerstoneTools/commits?author=chafey" title="Code">💻</a> <a href="#blog-chafey" title="Blogposts">📝</a> <a href="#talk-chafey" title="Talks">📢</a></td><td align="center"><a href="https://github.com/swederik"><img src="https://avatars3.githubusercontent.com/u/607793?v=4" width="100px;" alt="Erik Ziegler"/><br /><sub><b>Erik Ziegler</b></sub></a><br /><a href="https://github.com/cornerstonejs/cornerstoneTools/commits?author=swederik" title="Code">💻</a> <a href="https://github.com/cornerstonejs/cornerstoneTools/commits?author=swederik" title="Documentation">📖</a> <a href="#review-swederik" title="Reviewed Pull Requests">👀</a> <a href="#maintenance-swederik" title="Maintenance">🚧</a> <a href="#infra-swederik" title="Infrastructure (Hosting, Build-Tools, etc)">🚇</a> <a href="#question-swederik" title="Answering Questions">💬</a></td><td align="center"><a href="http://dannyrb.com/"><img src="https://avatars1.githubusercontent.com/u/5797588?v=4" width="100px;" alt="Danny Brown"/><br /><sub><b>Danny Brown</b></sub></a><br /><a href="https://github.com/cornerstonejs/cornerstoneTools/commits?author=dannyrb" title="Code">💻</a> <a href="https://github.com/cornerstonejs/cornerstoneTools/commits?author=dannyrb" title="Documentation">📖</a> <a href="#review-dannyrb" title="Reviewed Pull Requests">👀</a> <a href="#maintenance-dannyrb" title="Maintenance">🚧</a> <a href="#infra-dannyrb" title="Infrastructure (Hosting, Build-Tools, etc)">🚇</a> <a href="#plugin-dannyrb" title="Plugin/utility libraries">🔌</a> <a href="#question-dannyrb" title="Answering Questions">💬</a></td><td align="center"><a href="https://github.com/JamesAPetts"><img src="https://avatars0.githubusercontent.com/u/25818497?v=4" width="100px;" alt="James Petts"/><br /><sub><b>James Petts</b></sub></a><br /><a href="https://github.com/cornerstonejs/cornerstoneTools/commits?author=JamesAPetts" title="Code">💻</a> <a href="#review-JamesAPetts" title="Reviewed Pull Requests">👀</a> <a href="#plugin-JamesAPetts" title="Plugin/utility libraries">🔌</a> <a href="https://github.com/cornerstonejs/cornerstoneTools/commits?author=JamesAPetts" title="Documentation">📖</a> <a href="#question-JamesAPetts" title="Answering Questions">💬</a></td><td align="center"><a href="http://www.isomics.com"><img src="https://avatars0.githubusercontent.com/u/126077?v=4" width="100px;" alt="Steve Pieper"/><br /><sub><b>Steve Pieper</b></sub></a><br /><a href="#question-pieper" title="Answering Questions">💬</a> <a href="#tool-pieper" title="Tools">🔧</a></td><td align="center"><a href="https://rodrigoea.com/"><img src="https://avatars3.githubusercontent.com/u/1905961?v=4" width="100px;" alt="Rodrigo Antinarelli"/><br /><sub><b>Rodrigo Antinarelli</b></sub></a><br /><a href="https://github.com/cornerstonejs/cornerstoneTools/commits?author=rodrigolabs" title="Code">💻</a></td><td align="center"><a href="http://blog.zaidsafadi.com/"><img src="https://avatars2.githubusercontent.com/u/10813109?v=4" width="100px;" alt="Zaid Safadi"/><br /><sub><b>Zaid Safadi</b></sub></a><br /><a href="#question-Zaid-Safadi" title="Answering Questions">💬</a> <a href="https://github.com/cornerstonejs/cornerstoneTools/commits?author=Zaid-Safadi" title="Code">💻</a></td></tr><tr><td align="center"><a href="https://github.com/galelis"><img src="https://avatars3.githubusercontent.com/u/2378326?v=4" width="100px;" alt="Gustavo André Lelis"/><br /><sub><b>Gustavo André Lelis</b></sub></a><br /><a href="https://github.com/cornerstonejs/cornerstoneTools/commits?author=galelis" title="Code">💻</a></td><td align="center"><a href="https://github.com/kofifus"><img src="https://avatars1.githubusercontent.com/u/3926071?v=4" width="100px;" alt="Kofifus"/><br /><sub><b>Kofifus</b></sub></a><br /><a href="https://github.com/cornerstonejs/cornerstoneTools/commits?author=kofifus" title="Code">💻</a> <a href="#tool-kofifus" title="Tools">🔧</a> <a href="https://github.com/cornerstonejs/cornerstoneTools/issues?q=author%3Akofifus" title="Bug reports">🐛</a></td><td align="center"><a href="http://www.linkedin.com/in/alois-dreyfus/"><img src="https://avatars2.githubusercontent.com/u/25580127?v=4" width="100px;" alt="Aloïs Dreyfus"/><br /><sub><b>Aloïs Dreyfus</b></sub></a><br /><a href="https://github.com/cornerstonejs/cornerstoneTools/commits?author=adreyfus" title="Code">💻</a></td><td align="center"><a href="http://www.timl.id.au"><img src="https://avatars0.githubusercontent.com/u/616382?v=4" width="100px;" alt="Tim Leslie"/><br /><sub><b>Tim Leslie</b></sub></a><br /><a href="https://github.com/cornerstonejs/cornerstoneTools/commits?author=timleslie" title="Code">💻</a></td><td align="center"><a href="https://github.com/diego0020"><img src="https://avatars3.githubusercontent.com/u/7297450?v=4" width="100px;" alt="diego0020"/><br /><sub><b>diego0020</b></sub></a><br /><a href="https://github.com/cornerstonejs/cornerstoneTools/commits?author=diego0020" title="Code">💻</a></td><td align="center"><a href="https://github.com/evren217"><img src="https://avatars1.githubusercontent.com/u/4920551?v=4" width="100px;" alt="Evren Ozkan"/><br /><sub><b>Evren Ozkan</b></sub></a><br /><a href="https://github.com/cornerstonejs/cornerstoneTools/commits?author=evren217" title="Code">💻</a></td><td align="center"><a href="https://github.com/daniel2101"><img src="https://avatars2.githubusercontent.com/u/7647745?v=4" width="100px;" alt="Salvador Daniel Pelayo"/><br /><sub><b>Salvador Daniel Pelayo</b></sub></a><br /><a href="https://github.com/cornerstonejs/cornerstoneTools/commits?author=daniel2101" title="Code">💻</a></td></tr><tr><td align="center"><a href="https://github.com/jdnarvaez"><img src="https://avatars3.githubusercontent.com/u/3358381?v=4" width="100px;" alt="Juan Narvaez"/><br /><sub><b>Juan Narvaez</b></sub></a><br /><a href="https://github.com/cornerstonejs/cornerstoneTools/commits?author=jdnarvaez" title="Code">💻</a></td><td align="center"><a href="https://github.com/mikehazell"><img src="https://avatars0.githubusercontent.com/u/814227?v=4" width="100px;" alt="Mike"/><br /><sub><b>Mike</b></sub></a><br /><a href="https://github.com/cornerstonejs/cornerstoneTools/commits?author=mikehazell" title="Documentation">📖</a> <a href="https://github.com/cornerstonejs/cornerstoneTools/commits?author=mikehazell" title="Code">💻</a></td><td align="center"><a href="http://sisobus.com"><img src="https://avatars2.githubusercontent.com/u/3329885?v=4" width="100px;" alt="Sangkeun Kim"/><br /><sub><b>Sangkeun Kim</b></sub></a><br /><a href="https://github.com/cornerstonejs/cornerstoneTools/commits?author=sisobus" title="Code">💻</a> <a href="#question-sisobus" title="Answering Questions">💬</a></td><td align="center"><a href="https://github.com/vsaase"><img src="https://avatars3.githubusercontent.com/u/378021?v=4" width="100px;" alt="Victor Saase"/><br /><sub><b>Victor Saase</b></sub></a><br /><a href="#ideas-vsaase" title="Ideas, Planning, & Feedback">🤔</a></td><td align="center"><a href="http://www.mikewasser.com"><img src="https://avatars2.githubusercontent.com/u/120943?v=4" width="100px;" alt="Michael Wasser"/><br /><sub><b>Michael Wasser</b></sub></a><br /><a href="https://github.com/cornerstonejs/cornerstoneTools/commits?author=untoldone" title="Documentation">📖</a></td></tr></table>
-
+| [<img src="https://avatars2.githubusercontent.com/u/1268698?v=4" width="100px;" alt="Chris Hafey"/><br /><sub><b>Chris Hafey</b></sub>](https://www.linkedin.com/in/chafey)<br />[📖](https://github.com/cornerstonejs/cornerstoneTools/commits?author=chafey "Documentation") [💻](https://github.com/cornerstonejs/cornerstoneTools/commits?author=chafey "Code") [📝](#blog-chafey "Blogposts") [📢](#talk-chafey "Talks") | [<img src="https://avatars3.githubusercontent.com/u/607793?v=4" width="100px;" alt="Erik Ziegler"/><br /><sub><b>Erik Ziegler</b></sub>](https://github.com/swederik)<br />[💻](https://github.com/cornerstonejs/cornerstoneTools/commits?author=swederik "Code") [📖](https://github.com/cornerstonejs/cornerstoneTools/commits?author=swederik "Documentation") [👀](#review-swederik "Reviewed Pull Requests") [🚧](#maintenance-swederik "Maintenance") [🚇](#infra-swederik "Infrastructure (Hosting, Build-Tools, etc)") [💬](#question-swederik "Answering Questions") | [<img src="https://avatars1.githubusercontent.com/u/5797588?v=4" width="100px;" alt="Danny Brown"/><br /><sub><b>Danny Brown</b></sub>](http://dannyrb.com/)<br />[💻](https://github.com/cornerstonejs/cornerstoneTools/commits?author=dannyrb "Code") [📖](https://github.com/cornerstonejs/cornerstoneTools/commits?author=dannyrb "Documentation") [👀](#review-dannyrb "Reviewed Pull Requests") [🚧](#maintenance-dannyrb "Maintenance") [🚇](#infra-dannyrb "Infrastructure (Hosting, Build-Tools, etc)") [🔌](#plugin-dannyrb "Plugin/utility libraries") [💬](#question-dannyrb "Answering Questions") | [<img src="https://avatars0.githubusercontent.com/u/25818497?v=4" width="100px;" alt="James Petts"/><br /><sub><b>James Petts</b></sub>](https://github.com/JamesAPetts)<br />[💻](https://github.com/cornerstonejs/cornerstoneTools/commits?author=JamesAPetts "Code") [👀](#review-JamesAPetts "Reviewed Pull Requests") [🔌](#plugin-JamesAPetts "Plugin/utility libraries") [📖](https://github.com/cornerstonejs/cornerstoneTools/commits?author=JamesAPetts "Documentation") [💬](#question-JamesAPetts "Answering Questions") | [<img src="https://avatars0.githubusercontent.com/u/126077?v=4" width="100px;" alt="Steve Pieper"/><br /><sub><b>Steve Pieper</b></sub>](http://www.isomics.com)<br />[💬](#question-pieper "Answering Questions") [🔧](#tool-pieper "Tools") | [<img src="https://avatars3.githubusercontent.com/u/1905961?v=4" width="100px;" alt="Rodrigo Antinarelli"/><br /><sub><b>Rodrigo Antinarelli</b></sub>](https://rodrigoea.com/)<br />[💻](https://github.com/cornerstonejs/cornerstoneTools/commits?author=rodrigolabs "Code") | [<img src="https://avatars2.githubusercontent.com/u/10813109?v=4" width="100px;" alt="Zaid Safadi"/><br /><sub><b>Zaid Safadi</b></sub>](http://blog.zaidsafadi.com/)<br />[💬](#question-Zaid-Safadi "Answering Questions") [💻](https://github.com/cornerstonejs/cornerstoneTools/commits?author=Zaid-Safadi "Code") |
+| :---: | :---: | :---: | :---: | :---: | :---: | :---: |
+| [<img src="https://avatars3.githubusercontent.com/u/2378326?v=4" width="100px;" alt="Gustavo André Lelis"/><br /><sub><b>Gustavo André Lelis</b></sub>](https://github.com/galelis)<br />[💻](https://github.com/cornerstonejs/cornerstoneTools/commits?author=galelis "Code") | [<img src="https://avatars1.githubusercontent.com/u/3926071?v=4" width="100px;" alt="Kofifus"/><br /><sub><b>Kofifus</b></sub>](https://github.com/kofifus)<br />[💻](https://github.com/cornerstonejs/cornerstoneTools/commits?author=kofifus "Code") [🔧](#tool-kofifus "Tools") [🐛](https://github.com/cornerstonejs/cornerstoneTools/issues?q=author%3Akofifus "Bug reports") | [<img src="https://avatars2.githubusercontent.com/u/25580127?v=4" width="100px;" alt="Aloïs Dreyfus"/><br /><sub><b>Aloïs Dreyfus</b></sub>](http://www.linkedin.com/in/alois-dreyfus/)<br />[💻](https://github.com/cornerstonejs/cornerstoneTools/commits?author=adreyfus "Code") | [<img src="https://avatars0.githubusercontent.com/u/616382?v=4" width="100px;" alt="Tim Leslie"/><br /><sub><b>Tim Leslie</b></sub>](http://www.timl.id.au)<br />[💻](https://github.com/cornerstonejs/cornerstoneTools/commits?author=timleslie "Code") | [<img src="https://avatars3.githubusercontent.com/u/7297450?v=4" width="100px;" alt="diego0020"/><br /><sub><b>diego0020</b></sub>](https://github.com/diego0020)<br />[💻](https://github.com/cornerstonejs/cornerstoneTools/commits?author=diego0020 "Code") | [<img src="https://avatars1.githubusercontent.com/u/4920551?v=4" width="100px;" alt="Evren Ozkan"/><br /><sub><b>Evren Ozkan</b></sub>](https://github.com/evren217)<br />[💻](https://github.com/cornerstonejs/cornerstoneTools/commits?author=evren217 "Code") | [<img src="https://avatars2.githubusercontent.com/u/7647745?v=4" width="100px;" alt="Salvador Daniel Pelayo"/><br /><sub><b>Salvador Daniel Pelayo</b></sub>](https://github.com/daniel2101)<br />[💻](https://github.com/cornerstonejs/cornerstoneTools/commits?author=daniel2101 "Code") |
+| [<img src="https://avatars3.githubusercontent.com/u/3358381?v=4" width="100px;" alt="Juan Narvaez"/><br /><sub><b>Juan Narvaez</b></sub>](https://github.com/jdnarvaez)<br />[💻](https://github.com/cornerstonejs/cornerstoneTools/commits?author=jdnarvaez "Code") | [<img src="https://avatars0.githubusercontent.com/u/814227?v=4" width="100px;" alt="Mike"/><br /><sub><b>Mike</b></sub>](https://github.com/mikehazell)<br />[📖](https://github.com/cornerstonejs/cornerstoneTools/commits?author=mikehazell "Documentation") [💻](https://github.com/cornerstonejs/cornerstoneTools/commits?author=mikehazell "Code") | [<img src="https://avatars2.githubusercontent.com/u/3329885?v=4" width="100px;" alt="Sangkeun Kim"/><br /><sub><b>Sangkeun Kim</b></sub>](http://sisobus.com)<br />[💻](https://github.com/cornerstonejs/cornerstoneTools/commits?author=sisobus "Code") [💬](#question-sisobus "Answering Questions") | [<img src="https://avatars3.githubusercontent.com/u/378021?v=4" width="100px;" alt="Victor Saase"/><br /><sub><b>Victor Saase</b></sub>](https://github.com/vsaase)<br />[🤔](#ideas-vsaase "Ideas, Planning, & Feedback") | [<img src="https://avatars2.githubusercontent.com/u/120943?v=4" width="100px;" alt="Michael Wasser"/><br /><sub><b>Michael Wasser</b></sub>](http://www.mikewasser.com)<br />[📖](https://github.com/cornerstonejs/cornerstoneTools/commits?author=untoldone "Documentation") | [<img src="https://avatars2.githubusercontent.com/u/11068601?v=4" width="100px;" alt="Amandeep Singh"/><br /><sub><b>Amandeep Singh</b></sub>](https://github.com/singhArmani)<br />[🖋](#content-singhArmani "Content") |
 <!-- ALL-CONTRIBUTORS-LIST:END -->
 
 This project follows the [all-contributors][all-contributors] specification.

From 4fd3cd03e505ebbca29a2d954b34a8253016857f Mon Sep 17 00:00:00 2001
From: Amandeep Singh <singh_aman@hotmail.com.au>
Date: Fri, 10 May 2019 19:32:40 +1000
Subject: [PATCH 2/4] implemented CircleRoiTool to draw circle annotations

---
 index.html                                 |   3 +-
 package-lock.json                          |  47 +-
 src/index.js                               |   3 +
 src/tools/annotation/CircleRoiTool.js      | 514 +++++++++++++++++++++
 src/tools/annotation/CircleRoiTool.test.js | 248 ++++++++++
 src/tools/annotation/index.js              |   3 +
 6 files changed, 784 insertions(+), 34 deletions(-)
 create mode 100644 src/tools/annotation/CircleRoiTool.js
 create mode 100644 src/tools/annotation/CircleRoiTool.test.js

diff --git a/index.html b/index.html
index 6d844b656..91a29d7e9 100644
--- a/index.html
+++ b/index.html
@@ -51,6 +51,7 @@
           <li><a href="#" data-tool="ArrowAnnotate">ArrowAnnotate</a></li>
           <li><a href="#" data-tool="Angle">Angle</a></li>
           <li><a href="#" data-tool="Bidirectional">Bidirectional</a></li>
+          <li><a href="#" data-tool="CircleRoi">CircleRoi</a></li>
           <li><a href="#" data-tool="CobbAngle">Cobb Angle</a></li>
           <li><a href="#" data-tool="EllipticalRoi">EllipticalRoi</a></li>
           <li><a href="#" data-tool="Eraser">Eraser</a></li>
@@ -178,7 +179,7 @@
   <script src="netlify-example/imageLoader.js"></script>
 
   <script>
-    cornerstoneTools.init({showSVGCursors: true});
+    cornerstoneTools.init({ showSVGCursors: true });
     const imageIds = ['example://1', 'example://2', 'example://3'];
     const stack = {
       currentImageIdIndex: 0,
diff --git a/package-lock.json b/package-lock.json
index 6616348f2..d9d0b689b 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -4252,9 +4252,9 @@
       "dev": true
     },
     "cornerstone-math": {
-      "version": "0.1.8",
-      "resolved": "https://registry.npmjs.org/cornerstone-math/-/cornerstone-math-0.1.8.tgz",
-      "integrity": "sha512-x7NEQHBtVG7j1yeyj/aRoKTpXv1Vh2/H9zNLMyqYJDtJkNng8C4Q8M3CgZ1qer0Yr7eVq2x+Ynmj6kfOm5jXKw=="
+      "version": "0.1.7",
+      "resolved": "https://registry.npmjs.org/cornerstone-math/-/cornerstone-math-0.1.7.tgz",
+      "integrity": "sha512-svsDSoqLNFM9niCV2AtV2DNmRkYztT1v80lVdbA5hkgdGdpWg5/h2On794zbqBK+aI3hNOHufERDsI4wdXGknA=="
     },
     "cosmiconfig": {
       "version": "5.0.7",
@@ -6610,8 +6610,7 @@
         "ansi-regex": {
           "version": "2.1.1",
           "bundled": true,
-          "dev": true,
-          "optional": true
+          "dev": true
         },
         "aproba": {
           "version": "1.2.0",
@@ -6632,14 +6631,12 @@
         "balanced-match": {
           "version": "1.0.0",
           "bundled": true,
-          "dev": true,
-          "optional": true
+          "dev": true
         },
         "brace-expansion": {
           "version": "1.1.11",
           "bundled": true,
           "dev": true,
-          "optional": true,
           "requires": {
             "balanced-match": "^1.0.0",
             "concat-map": "0.0.1"
@@ -6654,20 +6651,17 @@
         "code-point-at": {
           "version": "1.1.0",
           "bundled": true,
-          "dev": true,
-          "optional": true
+          "dev": true
         },
         "concat-map": {
           "version": "0.0.1",
           "bundled": true,
-          "dev": true,
-          "optional": true
+          "dev": true
         },
         "console-control-strings": {
           "version": "1.1.0",
           "bundled": true,
-          "dev": true,
-          "optional": true
+          "dev": true
         },
         "core-util-is": {
           "version": "1.0.2",
@@ -6784,8 +6778,7 @@
         "inherits": {
           "version": "2.0.3",
           "bundled": true,
-          "dev": true,
-          "optional": true
+          "dev": true
         },
         "ini": {
           "version": "1.3.5",
@@ -6797,7 +6790,6 @@
           "version": "1.0.0",
           "bundled": true,
           "dev": true,
-          "optional": true,
           "requires": {
             "number-is-nan": "^1.0.0"
           }
@@ -6812,7 +6804,6 @@
           "version": "3.0.4",
           "bundled": true,
           "dev": true,
-          "optional": true,
           "requires": {
             "brace-expansion": "^1.1.7"
           }
@@ -6820,14 +6811,12 @@
         "minimist": {
           "version": "0.0.8",
           "bundled": true,
-          "dev": true,
-          "optional": true
+          "dev": true
         },
         "minipass": {
           "version": "2.3.5",
           "bundled": true,
           "dev": true,
-          "optional": true,
           "requires": {
             "safe-buffer": "^5.1.2",
             "yallist": "^3.0.0"
@@ -6846,7 +6835,6 @@
           "version": "0.5.1",
           "bundled": true,
           "dev": true,
-          "optional": true,
           "requires": {
             "minimist": "0.0.8"
           }
@@ -6927,8 +6915,7 @@
         "number-is-nan": {
           "version": "1.0.1",
           "bundled": true,
-          "dev": true,
-          "optional": true
+          "dev": true
         },
         "object-assign": {
           "version": "4.1.1",
@@ -6940,7 +6927,6 @@
           "version": "1.4.0",
           "bundled": true,
           "dev": true,
-          "optional": true,
           "requires": {
             "wrappy": "1"
           }
@@ -7026,8 +7012,7 @@
         "safe-buffer": {
           "version": "5.1.2",
           "bundled": true,
-          "dev": true,
-          "optional": true
+          "dev": true
         },
         "safer-buffer": {
           "version": "2.1.2",
@@ -7063,7 +7048,6 @@
           "version": "1.0.2",
           "bundled": true,
           "dev": true,
-          "optional": true,
           "requires": {
             "code-point-at": "^1.0.0",
             "is-fullwidth-code-point": "^1.0.0",
@@ -7083,7 +7067,6 @@
           "version": "3.0.1",
           "bundled": true,
           "dev": true,
-          "optional": true,
           "requires": {
             "ansi-regex": "^2.0.0"
           }
@@ -7127,14 +7110,12 @@
         "wrappy": {
           "version": "1.0.2",
           "bundled": true,
-          "dev": true,
-          "optional": true
+          "dev": true
         },
         "yallist": {
           "version": "3.0.3",
           "bundled": true,
-          "dev": true,
-          "optional": true
+          "dev": true
         }
       }
     },
diff --git a/src/index.js b/src/index.js
index 27731c6a2..a5ccf8317 100644
--- a/src/index.js
+++ b/src/index.js
@@ -79,6 +79,7 @@ import {
   AngleTool,
   ArrowAnnotateTool,
   BidirectionalTool,
+  CircleRoiTool,
   CobbAngleTool,
   EllipticalRoiTool,
   FreehandMouseTool,
@@ -204,6 +205,7 @@ const cornerstoneTools = {
   AngleTool,
   ArrowAnnotateTool,
   BidirectionalTool,
+  CircleRoiTool,
   CobbAngleTool,
   EllipticalRoiTool,
   FreehandMouseTool,
@@ -302,6 +304,7 @@ export {
   AngleTool,
   ArrowAnnotateTool,
   BidirectionalTool,
+  CircleRoiTool,
   CobbAngleTool,
   EllipticalRoiTool,
   FreehandMouseTool,
diff --git a/src/tools/annotation/CircleRoiTool.js b/src/tools/annotation/CircleRoiTool.js
new file mode 100644
index 000000000..a6e318a43
--- /dev/null
+++ b/src/tools/annotation/CircleRoiTool.js
@@ -0,0 +1,514 @@
+import external from './../../externalModules.js';
+import BaseAnnotationTool from '../base/BaseAnnotationTool.js';
+
+// State
+import { getToolState } from './../../stateManagement/toolState.js';
+import toolStyle from './../../stateManagement/toolStyle.js';
+import toolColors from './../../stateManagement/toolColors.js';
+
+// Drawing
+import {
+  getNewContext,
+  draw,
+  setShadow,
+  drawCircle,
+  drawHandles,
+  drawLinkedTextBox,
+} from './../../drawing/index.js';
+
+// Util
+import calculateSUV from './../../util/calculateSUV.js';
+import { calculateEllipseStatistics } from './../../util/ellipse/index.js';
+import numbersWithCommas from './../../util/numbersWithCommas.js';
+import throttle from './../../util/throttle.js';
+import { getLogger } from '../../util/logger.js';
+
+const logger = getLogger('tools:annotation:EllipticalRoiTool');
+
+/**
+ * @public
+ * @class CircleRoiTool
+ * @memberof Tools.Annotation
+ * @classdesc Tool for drawing circular regions of interest, and measuring
+ * the statistics of the enclosed pixels.
+ * @extends Tools.Base.BaseAnnotationTool
+ */
+export default class CircleRoiTool extends BaseAnnotationTool {
+  constructor(configuration = {}) {
+    const defaultConfig = {
+      name: 'CircleRoi',
+      supportedInteractionTypes: ['Mouse', 'Touch'],
+    };
+
+    const initialConfiguration = Object.assign(defaultConfig, configuration);
+
+    super(initialConfiguration);
+
+    this.initialConfiguration = initialConfiguration;
+  }
+
+  createNewMeasurement(eventData) {
+    const goodEventData =
+      eventData && eventData.currentPoints && eventData.currentPoints.image;
+
+    if (!goodEventData) {
+      logger.error(
+        `required eventData not supplied to tool ${
+          this.name
+        }'s createNewMeasurement`
+      );
+
+      return;
+    }
+
+    return {
+      visible: true,
+      active: true,
+      color: undefined,
+      invalidated: true,
+      handles: {
+        start: {
+          x: eventData.currentPoints.image.x,
+          y: eventData.currentPoints.image.y,
+          highlight: true,
+          active: false,
+        },
+        end: {
+          x: eventData.currentPoints.image.x,
+          y: eventData.currentPoints.image.y,
+          highlight: true,
+          active: true,
+        },
+        initialRotation: eventData.viewport.rotation,
+        textBox: {
+          active: false,
+          hasMoved: false,
+          movesIndependently: false,
+          drawnIndependently: true,
+          allowedOutsideImage: true,
+          hasBoundingBox: true,
+        },
+      },
+    };
+  }
+
+  pointNearTool(element, data, coords, interactionType) {
+    const hasStartAndEndHandles =
+      data && data.handles && data.handles.start && data.handles.end;
+
+    if (!hasStartAndEndHandles) {
+      logger.warn(
+        `invalid parameters supplied to tool ${this.name}'s pointNearTool`
+      );
+    }
+
+    if (!hasStartAndEndHandles || data.visible === false) {
+      return false;
+    }
+
+    const distance = interactionType === 'mouse' ? 15 : 25;
+
+    const startCanvas = external.cornerstone.pixelToCanvas(
+      element,
+      data.handles.start
+    );
+
+    const endCanvas = external.cornerstone.pixelToCanvas(
+      element,
+      data.handles.end
+    );
+
+    // StartCanvas is the center of the circle
+    const distanceFromCenter = _getDistance(startCanvas, coords);
+
+    // Getting radius of circle annotation in canvas
+    const radius = _getDistance(startCanvas, endCanvas);
+
+    // Checking if point is near the tool by comparing its distance from the center of the circle
+    return !(
+      distanceFromCenter > radius + distance / 2 || distanceFromCenter < radius
+    );
+  }
+
+  renderToolData(evt) {
+    const toolData = getToolState(evt.currentTarget, this.name);
+
+    if (!toolData) {
+      return;
+    }
+
+    const eventData = evt.detail;
+    const { image, element, canvasContext } = eventData;
+    const lineWidth = toolStyle.getToolWidth();
+    const { handleRadius, drawHandlesOnHover } = this.configuration;
+    const newContext = getNewContext(canvasContext.canvas);
+
+    // Meta
+    const seriesModule =
+      external.cornerstone.metaData.get('generalSeriesModule', image.imageId) ||
+      {};
+    const imagePlane =
+      external.cornerstone.metaData.get('imagePlaneModule', image.imageId) ||
+      {};
+
+    // Pixel Spacing
+    const modality = seriesModule.modality;
+    const hasPixelSpacing =
+      imagePlane && imagePlane.rowPixelSpacing && imagePlane.columnPixelSpacing;
+
+    const pixelSpacing = {
+      rowPixelSpacing: imagePlane.rowPixelSpacing || 1,
+      columnPixelSpacing: imagePlane.columnPixelSpacing || 1,
+    };
+
+    draw(newContext, context => {
+      // If we have tool data for this element - iterate over each set and draw it
+      for (let i = 0; i < toolData.data.length; i++) {
+        const data = toolData.data[i];
+
+        if (data.visible === false) {
+          continue;
+        }
+
+        // Configure
+        const color = toolColors.getColorIfActive(data);
+        const handleOptions = {
+          color,
+          handleRadius,
+          drawHandlesIfActive: drawHandlesOnHover,
+        };
+
+        setShadow(context, this.configuration);
+
+        const startCanvas = external.cornerstone.pixelToCanvas(
+          element,
+          data.handles.start
+        );
+
+        const endCanvas = external.cornerstone.pixelToCanvas(
+          element,
+          data.handles.end
+        );
+
+        // Calculating the radius where startCanvas is the center of the circle to be drawn
+        const radius = _getDistance(startCanvas, endCanvas);
+
+        // Draw Circle
+        drawCircle(
+          context,
+          element,
+          data.handles.start,
+          radius,
+          {
+            color,
+          },
+          'pixel'
+        );
+
+        drawHandles(context, eventData, data.handles, handleOptions);
+
+        // Update textbox stats
+        if (data.invalidated === true) {
+          if (data.cachedStats) {
+            _throttledUpdateCachedStats(
+              image,
+              element,
+              data,
+              modality,
+              pixelSpacing
+            );
+          } else {
+            _updateCachedStats(image, element, data, modality, pixelSpacing);
+          }
+        }
+
+        // Default to textbox on right side of ROI
+        if (!data.handles.textBox.hasMoved) {
+          data.handles.textBox.x = Math.max(
+            data.handles.start.x,
+            data.handles.end.x
+          );
+          data.handles.textBox.y =
+            (data.handles.start.y + data.handles.end.y) / 2;
+        }
+
+        const textBoxAnchorPoints = handles =>
+          _findTextBoxAnchorPoints(handles.start, handles.end);
+
+        const textBoxContent = _createTextBoxContent(
+          context,
+          image.color,
+          data.cachedStats,
+          modality,
+          hasPixelSpacing,
+          this.configuration
+        );
+
+        drawLinkedTextBox(
+          context,
+          element,
+          data.handles.textBox,
+          textBoxContent,
+          data.handles,
+          textBoxAnchorPoints,
+          color,
+          lineWidth,
+          0,
+          true
+        );
+      }
+    });
+  }
+}
+
+/**
+ *
+ */
+const _throttledUpdateCachedStats = throttle(_updateCachedStats, 110);
+
+/**
+ *
+ *
+ * @param {*} image
+ * @param {*} element
+ * @param {*} data
+ * @param {string} modality
+ * @param {*} pixelSpacing
+ * @returns {void}
+ */
+function _updateCachedStats(image, element, data, modality, pixelSpacing) {
+  const stats = _calculateStats(
+    image,
+    element,
+    data.handles,
+    modality,
+    pixelSpacing
+  );
+
+  data.cachedStats = stats;
+  data.invalidated = false;
+}
+
+/**
+ *
+ *
+ * @param {*} startHandle
+ * @param {*} endHandle
+ * @returns {Array.<{x: number, y: number}>}
+ */
+function _findTextBoxAnchorPoints(startHandle, endHandle) {
+  const { left, top, width, height } = _getCirlceImageCoodinates(
+    startHandle,
+    endHandle
+  );
+
+  return [
+    {
+      // Top middle point of ellipse
+      x: left + width / 2,
+      y: top,
+    },
+    {
+      // Left middle point of ellipse
+      x: left,
+      y: top + height / 2,
+    },
+    {
+      // Bottom middle point of ellipse
+      x: left + width / 2,
+      y: top + height,
+    },
+    {
+      // Right middle point of ellipse
+      x: left + width,
+      y: top + height / 2,
+    },
+  ];
+}
+
+/**
+ *
+ *
+ * @param {*} context
+ * @param {*} isColorImage
+ * @param {*} { area, mean, stdDev, min, max, meanStdDevSUV }
+ * @param {*} modality
+ * @param {*} hasPixelSpacing
+ * @param {*} [options={}] - { showMinMax, showHounsfieldUnits }
+ * @returns {string[]}
+ */
+function _createTextBoxContent(
+  context,
+  isColorImage,
+  { area, mean, stdDev, min, max, meanStdDevSUV } = {},
+  modality,
+  hasPixelSpacing,
+  options = {}
+) {
+  const showMinMax = options.showMinMax || false;
+  const showHounsfieldUnits = options.showHounsfieldUnits !== false;
+  const textLines = [];
+
+  // Don't display mean/standardDev for color images
+  const otherLines = [];
+
+  if (!isColorImage) {
+    const hasStandardUptakeValues = meanStdDevSUV && meanStdDevSUV.mean !== 0;
+    const suffix = modality === 'CT' && showHounsfieldUnits ? ' HU' : '';
+
+    let meanString = `Mean: ${numbersWithCommas(mean.toFixed(2))}${suffix}`;
+    const stdDevString = `Std Dev: ${numbersWithCommas(
+      stdDev.toFixed(2)
+    )}${suffix}`;
+
+    // If this image has SUV values to display, concatenate them to the text line
+    if (hasStandardUptakeValues) {
+      const SUVtext = ' SUV: ';
+
+      const meanSuvString = `${SUVtext}${numbersWithCommas(
+        meanStdDevSUV.mean.toFixed(2)
+      )}`;
+      const stdDevSuvString = `${SUVtext}${numbersWithCommas(
+        meanStdDevSUV.stdDev.toFixed(2)
+      )}`;
+
+      const targetStringLength = Math.floor(
+        context.measureText(`${stdDevString}     `).width
+      );
+
+      while (context.measureText(meanString).width < targetStringLength) {
+        meanString += ' ';
+      }
+
+      otherLines.push(`${meanString}${meanSuvString}`);
+      otherLines.push(`${stdDevString}     ${stdDevSuvString}`);
+    } else {
+      otherLines.push(`${meanString}     ${stdDevString}`);
+    }
+
+    if (showMinMax) {
+      let minString = `Min: ${min}${suffix}`;
+      const maxString = `Max: ${max}${suffix}`;
+      const targetStringLength = hasStandardUptakeValues
+        ? Math.floor(context.measureText(`${stdDevString}     `).width)
+        : Math.floor(context.measureText(`${meanString}     `).width);
+
+      while (context.measureText(minString).width < targetStringLength) {
+        minString += ' ';
+      }
+
+      otherLines.push(`${minString}${maxString}`);
+    }
+  }
+
+  textLines.push(_formatArea(area, hasPixelSpacing));
+  otherLines.forEach(x => textLines.push(x));
+
+  return textLines;
+}
+
+/**
+ *
+ *
+ * @param {*} area
+ * @param {*} hasPixelSpacing
+ * @returns {string} The formatted label for showing area
+ */
+function _formatArea(area, hasPixelSpacing) {
+  // This uses Char code 178 for a superscript 2
+  const suffix = hasPixelSpacing
+    ? ` mm${String.fromCharCode(178)}`
+    : ` px${String.fromCharCode(178)}`;
+
+  return `Area: ${numbersWithCommas(area.toFixed(2))}${suffix}`;
+}
+
+/**
+ *
+ *
+ * @param {*} image
+ * @param {*} element
+ * @param {*} handles
+ * @param {*} modality
+ * @param {*} pixelSpacing
+ * @returns {Object} The Stats object
+ */
+function _calculateStats(image, element, handles, modality, pixelSpacing) {
+  // Retrieve the bounds of the ellipse in image coordinates
+  const circleCoordinates = _getCirlceImageCoodinates(
+    handles.start,
+    handles.end
+  );
+
+  // Retrieve the array of pixels that the ellipse bounds cover
+  const pixels = external.cornerstone.getPixels(
+    element,
+    circleCoordinates.left,
+    circleCoordinates.top,
+    circleCoordinates.width,
+    circleCoordinates.height
+  );
+
+  // Calculate the mean & standard deviation from the pixels and the ellipse details.
+  const ellipseMeanStdDev = calculateEllipseStatistics(
+    pixels,
+    circleCoordinates
+  );
+
+  let meanStdDevSUV;
+
+  if (modality === 'PT') {
+    meanStdDevSUV = {
+      mean: calculateSUV(image, ellipseMeanStdDev.mean, true) || 0,
+      stdDev: calculateSUV(image, ellipseMeanStdDev.stdDev, true) || 0,
+    };
+  }
+
+  const area =
+    Math.PI *
+    ((circleCoordinates.width * (pixelSpacing.columnPixelSpacing || 1)) / 2) *
+    ((circleCoordinates.height * (pixelSpacing.rowPixelSpacing || 1)) / 2);
+
+  return {
+    area: area || 0,
+    count: ellipseMeanStdDev.count || 0,
+    mean: ellipseMeanStdDev.mean || 0,
+    variance: ellipseMeanStdDev.variance || 0,
+    stdDev: ellipseMeanStdDev.stdDev || 0,
+    min: ellipseMeanStdDev.min || 0,
+    max: ellipseMeanStdDev.max || 0,
+    meanStdDevSUV,
+  };
+}
+
+/**
+ * Retrieve the bounds of the ellipse in image coordinates
+ *
+ * @param {*} startHandle
+ * @param {*} endHandle
+ * @returns {{ left: number, top: number, width: number, height: number }}
+ */
+function _getCirlceImageCoodinates(startHandle, endHandle) {
+  const radius = _getDistance(startHandle, endHandle);
+
+  return {
+    left: Math.round(Math.min(startHandle.x - radius, endHandle.x)),
+    top: Math.round(Math.min(startHandle.y - radius, endHandle.y)),
+    width: radius * 2,
+    height: radius * 2,
+  };
+}
+
+/**
+ * Returns the distance in canvas from the given coords to the center of the circle annotation.
+ *
+ * @param {*} startCoords - start point cooridnates
+ * @param {*} endCoords - end point cooridnates
+ * @returns {number} number - the distance between two points (start and end)
+ */
+function _getDistance(startCoords, endCoords) {
+  const dx = startCoords.x - endCoords.x;
+  const dy = startCoords.y - endCoords.y;
+
+  return Math.sqrt(dx * dx + dy * dy);
+}
diff --git a/src/tools/annotation/CircleRoiTool.test.js b/src/tools/annotation/CircleRoiTool.test.js
new file mode 100644
index 000000000..91065d269
--- /dev/null
+++ b/src/tools/annotation/CircleRoiTool.test.js
@@ -0,0 +1,248 @@
+import CircleRoiTool from './CircleRoiTool.js';
+import { getToolState } from './../../stateManagement/toolState.js';
+import { getLogger } from '../../util/logger.js';
+
+/* ~ Setup
+ * In order to mock properly, Jest needs jest.mock('moduleName') to be in the
+ * same scope as the require/import statement.
+ */
+import external from '../../externalModules.js';
+
+jest.mock('../../util/logger.js');
+jest.mock('./../../stateManagement/toolState.js', () => ({
+  getToolState: jest.fn(),
+}));
+
+jest.mock('./../../import.js', () => ({
+  default: jest.fn(),
+}));
+
+jest.mock('../../externalModules.js');
+
+const badMouseEventData = 'hello world';
+const goodMouseEventData = {
+  currentPoints: {
+    image: {
+      x: 0,
+      y: 0,
+    },
+  },
+  viewport: {
+    rotation: 0,
+  },
+};
+
+describe('CircleRoiTool.js', () => {
+  describe('default values', () => {
+    it('has a default name of "CircleRoi"', () => {
+      const defaultName = 'CircleRoi';
+      const instantiatedTool = new CircleRoiTool();
+
+      expect(instantiatedTool.name).toEqual(defaultName);
+    });
+
+    it('can be created with a custom tool name', () => {
+      const customToolName = { name: 'customToolName' };
+      const instantiatedTool = new CircleRoiTool(customToolName);
+
+      expect(instantiatedTool.name).toEqual(customToolName.name);
+    });
+  });
+
+  describe('createNewMeasurement', () => {
+    it('emits console error if required eventData is not provided', () => {
+      const instantiatedTool = new CircleRoiTool();
+      const logger = getLogger();
+
+      instantiatedTool.createNewMeasurement(badMouseEventData);
+
+      expect(logger.error).toHaveBeenCalled();
+      expect(logger.error.mock.calls[0][0]).toContain(
+        'required eventData not supplied to tool'
+      );
+    });
+
+    // Todo: create a more formal definition of a tool measurement object
+    it('returns a tool measurement object', () => {
+      const instantiatedTool = new CircleRoiTool();
+
+      const toolMeasurement = instantiatedTool.createNewMeasurement(
+        goodMouseEventData
+      );
+
+      expect(typeof toolMeasurement).toBe(typeof {});
+    });
+
+    it("returns a measurement with a start and end handle at the eventData's x and y", () => {
+      const instantiatedTool = new CircleRoiTool();
+
+      const toolMeasurement = instantiatedTool.createNewMeasurement(
+        goodMouseEventData
+      );
+      const startHandle = {
+        x: toolMeasurement.handles.start.x,
+        y: toolMeasurement.handles.start.y,
+      };
+      const endHandle = {
+        x: toolMeasurement.handles.end.x,
+        y: toolMeasurement.handles.end.y,
+      };
+
+      expect(startHandle.x).toBe(goodMouseEventData.currentPoints.image.x);
+      expect(startHandle.y).toBe(goodMouseEventData.currentPoints.image.y);
+      expect(endHandle.x).toBe(goodMouseEventData.currentPoints.image.x);
+      expect(endHandle.y).toBe(goodMouseEventData.currentPoints.image.y);
+    });
+
+    it('returns a measurement with a initial rotation', () => {
+      const instantiatedTool = new CircleRoiTool();
+
+      const toolMeasurement = instantiatedTool.createNewMeasurement(
+        goodMouseEventData
+      );
+
+      const initialRotation = toolMeasurement.handles.initialRotation;
+
+      expect(initialRotation).toBe(goodMouseEventData.viewport.rotation);
+    });
+
+    it('returns a measurement with a textBox handle', () => {
+      const instantiatedTool = new CircleRoiTool();
+
+      const toolMeasurement = instantiatedTool.createNewMeasurement(
+        goodMouseEventData
+      );
+
+      expect(typeof toolMeasurement.handles.textBox).toBe(typeof {});
+    });
+  });
+
+  describe('pointNearTool', () => {
+    let element, coords;
+
+    beforeEach(() => {
+      element = jest.fn();
+      coords = jest.fn();
+    });
+
+    // Todo: Not sure we want all of our methods to check for valid params.
+    it('emits a console warning when measurementData without start/end handles are supplied', () => {
+      const instantiatedTool = new CircleRoiTool();
+      const noHandlesMeasurementData = {
+        handles: {},
+      };
+      const logger = getLogger();
+
+      instantiatedTool.pointNearTool(element, noHandlesMeasurementData, coords);
+
+      expect(logger.warn).toHaveBeenCalled();
+      expect(logger.warn.mock.calls[0][0]).toContain('invalid parameters');
+    });
+
+    it('returns false when measurement data is null or undefined', () => {
+      const instantiatedTool = new CircleRoiTool();
+      const nullMeasurementData = null;
+
+      const isPointNearTool = instantiatedTool.pointNearTool(
+        element,
+        nullMeasurementData,
+        coords
+      );
+
+      expect(isPointNearTool).toBe(false);
+    });
+
+    it('returns false when measurement data is not visible', () => {
+      const instantiatedTool = new CircleRoiTool();
+      const nullMeasurementData = null;
+
+      const isPointNearTool = instantiatedTool.pointNearTool(
+        element,
+        nullMeasurementData,
+        coords
+      );
+
+      expect(isPointNearTool).toBe(false);
+    });
+
+    it('returns false when point is inside the cirle roi', () => {
+      const instantiatedTool = new CircleRoiTool();
+      const toolMeasurement = instantiatedTool.createNewMeasurement(
+        goodMouseEventData
+      );
+
+      // Setting the coordinates to be inside the circle annotation
+      const coords = {
+        x: 20,
+        y: 20,
+      };
+
+      // picking a start handler as {x: 25, y: 25} and end handler as {x: 15, y: 15};
+      external.cornerstone.pixelToCanvas
+        .mockReturnValueOnce({
+          x: 25,
+          y: 25,
+        })
+        .mockReturnValueOnce({
+          x: 15,
+          y: 15,
+        });
+
+      const isPointNearTool = instantiatedTool.pointNearTool(
+        element,
+        toolMeasurement,
+        coords,
+        'mouse'
+      );
+
+      expect(isPointNearTool).toBe(false);
+    });
+
+    it('returns true when point is within in hit area region', () => {
+      const instantiatedTool = new CircleRoiTool();
+      const toolMeasurement = instantiatedTool.createNewMeasurement(
+        goodMouseEventData
+      );
+
+      // Setting the coordinates outside the cirlce boundary but between the half of hit area region(15)t
+      const coords = {
+        x: 15,
+        y: 30,
+      };
+
+      external.cornerstone.pixelToCanvas
+        .mockReturnValueOnce({
+          x: 15,
+          y: 20,
+        })
+        .mockReturnValueOnce({
+          x: 15,
+          y: 25,
+        });
+      const isPointNearTool = instantiatedTool.pointNearTool(
+        element,
+        toolMeasurement,
+        coords,
+        'mouse'
+      );
+
+      expect(isPointNearTool).toBe(true);
+    });
+  });
+
+  describe('renderToolData', () => {
+    it('returns undefined when no toolData exists for the tool', () => {
+      const instantiatedTool = new CircleRoiTool();
+      const mockEvent = {
+        detail: undefined,
+        currentTarget: undefined,
+      };
+
+      getToolState.mockReturnValueOnce(undefined);
+
+      const renderResult = instantiatedTool.renderToolData(mockEvent);
+
+      expect(renderResult).toBe(undefined);
+    });
+  });
+});
diff --git a/src/tools/annotation/index.js b/src/tools/annotation/index.js
index c8cf9e412..b85825381 100644
--- a/src/tools/annotation/index.js
+++ b/src/tools/annotation/index.js
@@ -1,6 +1,7 @@
 import AngleTool from './AngleTool.js';
 import ArrowAnnotateTool from './ArrowAnnotateTool.js';
 import BidirectionalTool from './BidirectionalTool.js';
+import CircleRoiTool from './CircleRoiTool.js';
 import CobbAngleTool from './CobbAngleTool.js';
 import EllipticalRoiTool from './EllipticalRoiTool.js';
 import FreehandMouseTool from './FreehandMouseTool.js';
@@ -13,6 +14,7 @@ import TextMarkerTool from './TextMarkerTool.js';
 export { default as AngleTool } from './AngleTool.js';
 export { default as ArrowAnnotateTool } from './ArrowAnnotateTool.js';
 export { default as BidirectionalTool } from './BidirectionalTool.js';
+export { default as CircleRoiTool } from './CircleRoiTool.js';
 export { default as CobbAngleTool } from './CobbAngleTool.js';
 export { default as EllipticalRoiTool } from './EllipticalRoiTool.js';
 export { default as FreehandMouseTool } from './FreehandMouseTool.js';
@@ -26,6 +28,7 @@ export default {
   AngleTool,
   ArrowAnnotateTool,
   BidirectionalTool,
+  CircleRoiTool,
   CobbAngleTool,
   EllipticalRoiTool,
   FreehandMouseTool,

From f4fcf65704d64ddcc5d6136637fffad50f8a6a80 Mon Sep 17 00:00:00 2001
From: Amandeep Singh <singh_aman@hotmail.com.au>
Date: Fri, 10 May 2019 19:47:16 +1000
Subject: [PATCH 3/4] fixed the typo

---
 src/tools/annotation/CircleRoiTool.test.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/tools/annotation/CircleRoiTool.test.js b/src/tools/annotation/CircleRoiTool.test.js
index 91065d269..fbf8edf5e 100644
--- a/src/tools/annotation/CircleRoiTool.test.js
+++ b/src/tools/annotation/CircleRoiTool.test.js
@@ -198,13 +198,13 @@ describe('CircleRoiTool.js', () => {
       expect(isPointNearTool).toBe(false);
     });
 
-    it('returns true when point is within in hit area region', () => {
+    it('returns true when point is within hit area region', () => {
       const instantiatedTool = new CircleRoiTool();
       const toolMeasurement = instantiatedTool.createNewMeasurement(
         goodMouseEventData
       );
 
-      // Setting the coordinates outside the cirlce boundary but between the half of hit area region(15)t
+      // Setting the coordinates outside the cirlce boundary but between the half of hit area region(15)
       const coords = {
         x: 15,
         y: 30,

From 18ef502987bb2aad0ef7dcdc635288ce0232cbd2 Mon Sep 17 00:00:00 2001
From: Danny Brown <danny.ri.brown@gmail.com>
Date: Fri, 10 May 2019 08:38:27 -0400
Subject: [PATCH 4/4] feat(CircleRoiTool): Create a Circle ROI Tool

---
 src/tools/annotation/CircleRoiTool.test.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/tools/annotation/CircleRoiTool.test.js b/src/tools/annotation/CircleRoiTool.test.js
index fbf8edf5e..5e430f1b6 100644
--- a/src/tools/annotation/CircleRoiTool.test.js
+++ b/src/tools/annotation/CircleRoiTool.test.js
@@ -3,7 +3,7 @@ import { getToolState } from './../../stateManagement/toolState.js';
 import { getLogger } from '../../util/logger.js';
 
 /* ~ Setup
- * In order to mock properly, Jest needs jest.mock('moduleName') to be in the
+ * To mock properly, Jest needs jest.mock('moduleName') to be in the
  * same scope as the require/import statement.
  */
 import external from '../../externalModules.js';