Yes, you can pursue your m.sc in distance education mode. Many universities offer online m.sc degree and hey ar valid and hold the same academic value as their own - campus counterparts. To be eligible for m.sc in nuclear medicine, candidates must have graduated from a reputed board/ institution.

Some of the colleges that provide m.sc in nuclear medicine in distance education are

. Sunrise university

. Jain University

. Rajiv Gandhi University of Health Science

. JIPMER Puducherry

.Sri Venkateswara institute of medical sciences

.AIIMS Rishikesh  etc.

For further information ,you can visit career 360 website

https://www.careers360.com/courses/nuclear-medicine-course