diff --git a/templates/qc_report/celltypes_qc.rmd b/templates/qc_report/celltypes_qc.rmd
index e1c27931..3a221d15 100644
--- a/templates/qc_report/celltypes_qc.rmd
+++ b/templates/qc_report/celltypes_qc.rmd
@@ -1,5 +1,10 @@
 # Cell type Annotation Summary
 
+```{r, child='utils/celltype_functions.rmd'}
+
+```
+
+
 ```{r}
 ## function definitions ##
 
@@ -112,66 +117,6 @@ plot_umap <- function(
     theme(legend.position = "bottom")
 }
 
-#' Create `celltype_df` data frame for use in cell type QC reports
-#'
-#' @param processed_sce The processed sce object with cell type annotations in colData
-#'
-#' @return `celltype_df` with column of cell types, as factors, for each annotation method
-create_celltype_df <- function(processed_sce) {
-  celltype_df <- processed_sce |>
-    scuttle::makePerCellDF(use.dimred = "UMAP") |>
-    # rename UMAP columns as needed to remove potential period added by `scuttle::makePerCellDF`
-    dplyr::rename_with(
-      \(x) stringr::str_replace(x, "^UMAP\\.", "UMAP"),
-      starts_with("UMAP")
-    ) |>
-    # only keep columns of interest
-    dplyr::select(
-      barcodes,
-      cluster,
-      contains("UMAP"),
-      contains("singler"),
-      contains("cellassign"),
-      contains("submitter")
-    )
-
-  if ("singler_celltype_annotation" %in% names(celltype_df)) {
-    celltype_df <- celltype_df |>
-      prepare_annotation_values(singler_celltype_annotation)
-  }
-  if ("cellassign_celltype_annotation" %in% names(celltype_df)) {
-    celltype_df <- celltype_df |>
-      prepare_annotation_values(cellassign_celltype_annotation)
-  }
-
-  return (celltype_df)
-}
-
-#' Prepare and reformat cell type annotation values for use in QC reports
-#'  Unknown cell types are updated with the label "Unknown cell type", and
-#'  cell types are ordered in order of descending frequency, but with
-#'  "Unknown cell type" as the last level
-#'
-#' @param df The data frame containing cell type annotations, one row per cell
-#' @param annotation_column The column (written plainly, not a string) containing annotations to reformat
-#'
-#' @return Updated data frame with the `annotation_column` reformatted
-prepare_annotation_values <- function(df, annotation_column) {
-  df |>
-    dplyr::mutate(
-      {{ annotation_column }} := dplyr::case_when(
-        # singler condition
-        is.na({{ annotation_column }}) ~ "Unknown cell type",
-        # cellassign conditon
-        {{ annotation_column }} == "other" ~ "Unknown cell type",
-        # otherwise, keep it
-        .default = {{ annotation_column }}
-      ) |>
-        forcats::fct_infreq() |>
-        forcats::fct_relevel("Unknown cell type", after = Inf)
-    )
-}
-
 ```
 
 
diff --git a/templates/qc_report/celltypes_supplemental_report.rmd b/templates/qc_report/celltypes_supplemental_report.rmd
index b88fd5b5..539d7a1a 100644
--- a/templates/qc_report/celltypes_supplemental_report.rmd
+++ b/templates/qc_report/celltypes_supplemental_report.rmd
@@ -34,10 +34,15 @@ theme_set(
       strip.background = element_rect(fill = "transparent")
     )
 )
+```
+
+
+```{r, child='utils/celltype_functions.rmd'}
+
+```
 
-# Source functions for preparing cell type data
-source(file.path("utils", "celltype_functions.R"))
 
+```{r setup, message = FALSE, echo = FALSE}
 # define library and sce object
 library_id <- params$library
 processed_sce <- params$processed_sce
diff --git a/templates/qc_report/utils/celltype_functions.R b/templates/qc_report/utils/celltype_functions.rmd
similarity index 99%
rename from templates/qc_report/utils/celltype_functions.R
rename to templates/qc_report/utils/celltype_functions.rmd
index 76f567dd..a26fdcf3 100644
--- a/templates/qc_report/utils/celltype_functions.R
+++ b/templates/qc_report/utils/celltype_functions.rmd
@@ -1,3 +1,4 @@
+```{r}
 library(SingleCellExperiment)
 
 # This script contains function definitions that are used by both
@@ -65,5 +66,5 @@ prepare_annotation_values <- function(df, annotation_column) {
         forcats::fct_relevel("Unknown cell type", after = Inf)
     )
 }
-
+```