hi,

see some of the colleges take m.sc admission  on the basis of graduation course, and others have their own entrance test, I have mentioned some institute name  below which provides msc in medical physics, you need to check the official website for admission process before applying,

anna university chennai

bharthiar university

savetha medical college chennai

government medical college , thiruvanthapuram,

cmc vellore

aryabhatta knowledge university

jagadguru sri shivaratheswara university

MGMIHS

KERALA university of health sciences.