What Is The Name Of Nuclear Scan That Tests Small Intestines?

Doctors discovered a mesenteric root mass in my small intestines in 2010 that was partially calcified and measured 3 cm that has grown to 7 cm. by November of 2014. There is no renal, urethral,or bladder calculus.Oncologist plans a nuclear scan prior to surgery. I was so overwhelmed at the news that I did not get the full name of the scan that I will undergo. Can you tell me the full name of the nuclear scan to test my small intestines? And what is involved?