In which application is Tc Sodium Pertechnetate NOT commonly used?

• A. Thyroid imaging
• B. Meckel's scan
• C. Cardiac stress testing
• D. Brain survival studies

Answer: (C)

Tc Sodium Pertechnetate is primarily used in various nuclear medicine imaging applications due to its favorable properties. It is particularly well-known for its use in thyroid imaging, where it helps visualize thyroid function and localization, and in Meckel's scan, which evaluates ectopic gastric mucosa in the intestines.

When it comes to cardiac stress testing, this application typically uses different radiopharmaceuticals that provide more specific information about myocardial perfusion and function, such as technetium-99m sestamibi or technetium-99m tetrofosmin. These agents are better suited for assessing the heart's condition under stress conditions, as they have optimized pharmacokinetics that align more closely with cardiac tissue.

In brain survival studies, Tc Sodium Pertechnetate may find limited use as well, since other radiopharmaceuticals are preferred that can better assess cerebral blood flow, such as those designed specifically for brain imaging.

Thus, while Tc Sodium Pertechnetate is a versatile agent, its common applications do not extend to cardiac stress testing, making that the most accurate choice for the scenario presented.