Dear SPmers,When i am defining ROI's in MARSBAR (sphere with coordinate -51 0 -39 ),volume covered is 4288 but when the coordinate is -52 -66 31 ,volume is 3984 but i defined the radius 10mm for both the cases.
I am not able to comprehend it,why it is happening??I am attaching the figures herewith.Regards,Dhananjay Kimothi