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Created offset calculations for Catphan604 #297

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Created offset calculations for Catphan604 #297

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26fa142
Created offset calculations for Catphan604
May 24, 2020
8509511
Modified to drop distal chop and also account for step size.
jrkerns May 25, 2020
b173259
updated gitignore
crcrewso Jun 10, 2020
eca9821
Merge branch 'CatPhan604HURegistration' of github.com:crcrewso/pylina…
crcrewso Jun 10, 2020
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2 changes: 2 additions & 0 deletions .gitignore
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Original file line number Diff line number Diff line change
@@ -1,4 +1,5 @@
# Folders to ignore
.vscode
env/*
**/pylinac.egg-info
#**/demo_files
Expand All @@ -7,3 +8,4 @@ env/*
#Files to ignore
*.old
.directory

5 changes: 5 additions & 0 deletions pylinac/ct.py
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Expand Up @@ -19,6 +19,7 @@
import webbrowser
import zipfile
from typing import Optional
from math import ceil, floor

import matplotlib.pyplot as plt
import numpy as np
Expand Down Expand Up @@ -1023,6 +1024,10 @@ def find_origin_slice(self):

if not hu_slices:
raise ValueError("No slices were found that resembled the HU linearity module")
if isinstance(self, CatPhan604):
_604_hu_offset_index_front = int(ceil(5 / self.dicom_stack.metadata.SliceThickness))
_604_hu_offset_index_back = int(ceil(2 / self.dicom_stack.metadata.SliceThickness))
hu_slices = hu_slices[_604_hu_offset_index_front:-_604_hu_offset_index_back]
hu_slices = np.array(hu_slices)
c = int(round(np.median(hu_slices)))
ln = len(hu_slices)
Expand Down