From 11f7bd260137a18496bdfd00ddb742ef0cf2d2fd Mon Sep 17 00:00:00 2001
From: scaramallion <scaramallion@users.noreply.github.com>
Date: Mon, 16 Oct 2023 10:35:46 +1100
Subject: [PATCH 1/4] Fix Pillow raising AttributeError due to Image.mode being
 read-only

Index: pydicom-2.4.4/pydicom/pixel_data_handlers/pillow_handler.py
===================================================================
--- pydicom-2.4.4.orig/pydicom/pixel_data_handlers/pillow_handler.py
+++ pydicom-2.4.4/pydicom/pixel_data_handlers/pillow_handler.py
@@ -129,7 +129,11 @@ def _decompress_single_frame(
                 image.tile[0][2],
                 (color_mode, ''),
             )]
-            image.mode = color_mode
+            # Pillow 10.1+ made Image.mode read-only
+            if hasattr(image, "_mode"):
+                image._mode = color_mode
+            else:
+                image.mode = color_mode
             image.rawmode = color_mode
     return image