From 1c27abffdb62aff2d2fd51f9e258ab330e0c41ed Mon Sep 17 00:00:00 2001
From: Anthony Galassi <28850131+bendhouseart@users.noreply.github.com>
Date: Wed, 11 Dec 2024 10:37:09 -0600
Subject: [PATCH] add error message to alert user to frame mismatch

---
 petdeface/pet.py | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/petdeface/pet.py b/petdeface/pet.py
index e2631fe..5dd810b 100644
--- a/petdeface/pet.py
+++ b/petdeface/pet.py
@@ -55,6 +55,14 @@ def _run_interface(self, runtime):
         frames_duration = np.array(meta.outputs.out_dict["FrameDuration"])
 
         mid_frames = frames_start + frames_duration / 2
+
+        # check to see if the json sidecar file has the correct number of frames
+        if len(mid_frames) != data.shape[-1]:
+            json_file = pet_file.replace(".gz", "").replace(".nii", ".json")
+            raise ValueError(
+                f"Number of frames in {pet_file} does not match the number of frames in the json sidecar file {json_file}"
+            )
+
         wavg = np.trapz(data, x=mid_frames) / (mid_frames[-1] - mid_frames[0])
 
         _, base, ext = split_filename(pet_file)