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Single scatter #143

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Single scatter #143

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cffb26c
Merge pull request #134 from qurit/development
lukepolson Mar 1, 2024
bee4f27
Merge pull request #136 from qurit/development
lukepolson Mar 4, 2024
b9ad66d
Update dicom.py
pearsomark Mar 24, 2024
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10 changes: 8 additions & 2 deletions src/pytomography/io/SPECT/dicom.py
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Original file line number Diff line number Diff line change
Expand Up @@ -196,6 +196,8 @@ def get_scatter_from_TEW(
file: str, index_peak: int, index_lower: int, index_upper: int
) -> torch.Tensor:
"""Gets an estimate of scatter projection data from a DICOM file using the triple energy window method.
If there is only one scatter window, set both index_lower and index_upper to the lower index.
The upper scatter window will be set to zero

Args:
file (str): Filepath of the DICOM file
Expand All @@ -211,9 +213,13 @@ def get_scatter_from_TEW(
ww_lower = get_window_width(ds, index_lower)
ww_upper = get_window_width(ds, index_upper)
projections_all = get_projections(file)
projections_upper = projections_all[index_upper]
if index_lower == index_upper:
projections_upper = projections_all[index_upper].detach().clone()
projections_upper[:] = 0
scatter = compute_TEW(
projections_all[index_lower],
projections_all[index_upper],
projections_upper,
ww_lower,
ww_upper,
ww_peak,
Expand Down Expand Up @@ -589,4 +595,4 @@ def save_dcm(
# Set the pixel data
ds_i.PixelData = pixel_data[i].tobytes()
ds_i.save_as(os.path.join(save_path, f'{ds.SOPInstanceUID}.dcm'))