From 923d3f1b1730eb0322f8bf2edddb0ff8cae265f2 Mon Sep 17 00:00:00 2001
From: Apoorv Saraogee <136734128+asaraog@users.noreply.github.com>
Date: Fri, 25 Sep 2026 18:10:05 -0700
Subject: [PATCH 1/2] Test that Volume.copy keeps channels

---
 tests/test_volume.py | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/tests/test_volume.py b/tests/test_volume.py
index 91ba3891..08516eed 100644
--- a/tests/test_volume.py
+++ b/tests/test_volume.py
@@ -1584,3 +1584,15 @@ def test_reassign_dtype(dtype):
             )
         ):
             volume.array = np.zeros((10, 10, 10), dtype=dtype)
+
+
+def test_copy_keeps_channels():
+    vol = Volume(
+        array=np.zeros((2, 3, 3, 2), dtype=np.uint8),
+        affine=np.eye(4),
+        coordinate_system="PATIENT",
+        channels={'SegmentNumber': [1, 2]},
+    )
+    copied = vol.copy()
+    assert copied.channel_shape == vol.channel_shape
+    assert copied.get_channel_values('SegmentNumber') == [1, 2]

From 67b0c33be79999134f72e2765c233bbce9d9555e Mon Sep 17 00:00:00 2001
From: Apoorv Saraogee <136734128+asaraog@users.noreply.github.com>
Date: Fri, 25 Sep 2026 18:29:09 -0700
Subject: [PATCH 2/2] Keep channels in Volume.copy

---
 src/highdicom/volume.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/highdicom/volume.py b/src/highdicom/volume.py
index 467cb553..8da45581 100644
--- a/src/highdicom/volume.py
+++ b/src/highdicom/volume.py
@@ -2972,6 +2972,7 @@ def copy(self) -> Self:
             affine=self._affine.copy(),
             coordinate_system=self.coordinate_system,
             frame_of_reference_uid=self.frame_of_reference_uid,
+            channels=self._channels,
         )
 
     def with_array(