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Handle exception case with missing DICOM Rescale Intercept and Slope attributes #236

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Merged
merged 2 commits into from
Jan 12, 2022
Merged

Handle exception case with missing DICOM Rescale Intercept and Slope attributes #236

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Assume default values for missing Rescale Intercept and Slope attribu…
MMelQin Jan 12, 2022
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MMelQin Jan 12, 2022
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12 changes: 10 additions & 2 deletions monai/deploy/operators/dicom_series_to_volume_operator.py
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Original file line number Diff line number Diff line change
Expand Up @@ -84,8 +84,16 @@ def generate_voxel_data(self, series):
# This is to have the same numpy ndarray as from Monai ImageReader (ITK, NiBabel etc).
vol_data = np.stack([np.transpose(s.get_pixel_array()) for s in slices], axis=-1)
vol_data = vol_data.astype(np.int16)
intercept = slices[0][0x0028, 0x1052].value
slope = slices[0][0x0028, 0x1053].value
# Rescale Intercept and Slope attributes might be missing, but safe to assume defaults.
try:
intercept = slices[0][0x0028, 0x1052].value
except KeyError:
intercept = 0

try:
slope = slices[0][0x0028, 0x1053].value
except KeyError:
slope = 1

if slope != 1:
vol_data = slope * vol_data.astype(np.float64)
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