My name is Nevin, I am a M.Sc Medical Physics student at the University of Canterbury, New Zealand. I am currently using Pymedphys, specifically the Gamma function to calculate the gamma from DICOM images. However, I have some questions I was hoping you could answer.
Firstly, from the “Gamma from DICOM” How-to guide (Gamma from DICOM — PyMedPhys). I noticed that when using the provided logfiles, there were several gamma evaluation/reference, dose difference and local gamma images generated. I was a bit confused about this as when I did the same for my DICOM images, I only got one set of gamma evaluation/reference, dose difference and local gamma images generated. I was wondering what the difference is between the various sets of images?
Secondly, I was hoping you could explain what the set of images with the gamma evaluation/reference, dose difference and local gamma images meant? I have been able to generate the images using the provided code but both me and my supervisor are unsure as to what the images specifically mean. For example, in this image
Does the blue coloured part of the Local Gamma image show where the gamma analysis fails for the evaluation against the reference image? If so, why does the dose difference not align with this particular image?
For reference, I have also attached the particular images I am using for my project, these are TOPAS generated DICOM images.
Thanks you so much,
P.S Big fan of your work on pymedphys