I have CTA brain data-sets for pre-operation and post operation of stroke patients and I want to segment the cerebral vessels to run some comparisons of geometry. I’ve been running into issues with other segmentation methods until I stumbled upon the subtraction method.
Unfortunately I don’t any pre-contrast injection images to use as my baseline. I was wondering if anyone knows a way of circumventing this by possibly changing the window/level of the CTA data set to mimic that of pre-contrast injection?
Any tips or tricks would be much appreciated