CBCT analysis

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1

Dear All,
Since I am new to the python and pylinac i cant solve this error
I am getting Overflow error as shown below for some images during Catphan analysis
Could anybody help in sorting this error or why this error occurs

Traceback (most recent call last):
 File "C:\Program Files\Python36-32\lib\tkinter\__init__.py", line 1702, in __call__
return self.func(*args)
 File "c:\python\venv\lib\site-packages\pylinac\py_gui.py", line 196, in analyze_cbct
 cat = getattr(ct, self.ct_catphantype.get())(self.ct_file.get())
File "c:\python\venv\lib\site-packages\pylinac\ct.py", line 72, in __init__
self.dicom_stack = image.DicomImageStack(folderpath)
File "c:\python\venv\lib\site-packages\pylinac\core\image.py", line 894, in __init__
if self.is_CT_slice(path):
File "c:\python\venv\lib\site-packages\pylinac\core\image.py", line 926, in is_CT_slice
ds = dicom.read_file(file, force=True, stop_before_pixels=True)
File "c:\python\venv\lib\site-packages\dicom\filereader.py", line 614, in read_file
force=force)
File "c:\python\venv\lib\site-packages\dicom\filereader.py", line 553, in read_partial
stop_when=stop_when, defer_size=defer_size)
File "c:\python\venv\lib\site-packages\dicom\filereader.py", line 305, in read_dataset
raw_data_element = next(de_gen)
File "c:\python\venv\lib\site-packages\dicom\filereader.py", line 219, in data_element_generator
value = fp_read(length)
OverflowError: cannot fit 'int' into an index-sized integer
2

Hi Prabakar,
This looks like an issue with your DICOM images, as the fault is coming from pydicom. I would ask over in their forum. You can also try loading the image yourself in a small script. I.e. do

dicom.read_file(‘thefile.dcm’)

and see if any errors pop up. if no errors come out then we can dig further.

3

Thanks James,
Sorry for the issue, The issue is with the corrupted Dicom folder Thanks for replying