Effects in image quality

[AhalScript]

Hi, what is the significance of add_focal_spot() in MTF graph . what is actually add_focal_spot() function used .Is there is any parameter or which help to compare the effect of the image quality while changing the Source - object distance and object - detector distance. I was working to know best structure and parameters to get a good quality image as output.

[jerichooconnell]

Add focal spot degrades the MTF of the detector, source object distance and source to imager distance are held in the phantom.geomet object. print(phantom.geomet) should show you what they are set as. You can set the by specifying something like phantom.geomet.SDD = 1600 #mm