hello aspirant,

top colleges in this field are-

• JIPMER Puducherry - Jawaharlal Institute of Postgraduate Medical Education and Research.
• AKU - Aryabhatta Knowledge University.
• Manipal School of Allied Health Sciences, Manipal.
• Apollo Institute of Hospital Management and Allied Sciences - AIHMAS.

• for more colleges you can refer to the following link-

https://medicine.careers360.com/colleges/list-of-oncology-and-radiotherapy-colleges-in-india

hope that helps

all the best