I am given different CT perfusion maps like cerebral blood flow (CBF) or mean transit time (MTT). Given these 3D images, I have to produce predictions using machine learning algorithms.
Can you explain how these perfusion maps are produced (input and output)? I just need a general overview from a medical POV.
Is my understanding correct?
- inject contrast material in the patient
- perform CT scan, the output is a 4D dimensional image with x, y, z and time axis. The time axis shows how the blood flows during the k seconds of the scan.
- reduce the 4D image into a 3D image with some computations to produce MTT, CBF, ...
- The medical practitioner analyzes the different maps (MTT, CBF, ...) and looks at different window settings (stroke window, brain window, ...)