About Radioisotopes

Radioisotopes have important uses in medical diagnosis, treatment, and research.

A radioisotope is a version of a chemical element that has an unstable nucleus and emits radiation during its decay. A radioisotope used for diagnostic purposes in patients must emit gamma rays of sufficient energy to escape from the human body and have a half-life short enough for it to decay away soon after imaging is completed to insure the patient is unaffected by these very small doses of radiation. The radioisotope most widely used in medicine is Technetium-99m (Tc99), employed in some 80% of all nuclear medicine procedures. Tc99 is the decay product generated from Molybdenum-99 (Mo99).

GMIS is poised to begin industrialization of its production system and delivery of its two proven products- Molybdenum-99 and Iodine -131. Additional valuable and important radioisotopes include Yttrium-90 (Y-90), Nitrogen-13 (N-13) and others in the Company’s ongoing research and development process. GMIS’ portfolio of new products, made through its patented production system, will add valuable alternative sources of these much needed radioisotopes.

Nitrogen-13 (N-13)

Nitrogen-13 (N-13) is a radioisotope used in positron emission tomography (PET) and for myocardial perfusion imaging.


Yttrium-90 plays a significant role in the treatment of hepatocellular carcinoma (HCC) and other liver cancers.