The Myocardial Perfusion Scan segment is further sub-segmented into Technetium-99m, Thallium-201, Rubidium-82, and others. The ... Demand for radiopharmaceuticals is growing due to raising awareness about availability of radiation and radioisotopes in ... The SPECT radiopharmaceutical segment is further sub-segmented into Technetium-99m, Thallium-201, Iodine-123, and others. The ... and the demand for therapy with radioisotopes is about one-tenth of this. Radiopharmaceuticals use radiation to provide ...