Hi Ankita !

Yes you can definitely go in for M.Sc in Radiology after  completing B.Sc in Physics.

A Radiologist is a physician who has completed a residency program in one of the disciplines of Radiology (viz., Diagnostic, Therapeutic and Nuclear Medicine), becoming a certified clinical specialist.

Here is a list of colleges for M.Sc in Radiology:

https://medicine.careers360.com/colleges/list-of-radiology-colleges-in-india