What imaging type is performed with Tc tetrofosmin?

• A. Brain scan
• B. Myocardial perfusion imaging
• C. Liver scan
• D. Bone scan

Answer: (B)

Tc tetrofosmin is specifically utilized for myocardial perfusion imaging. This radiopharmaceutical is designed to assess blood flow to the heart muscle, which is crucial for diagnosing various cardiac conditions such as coronary artery disease and myocardial infarctions. Tetrofosmin is a lipophilic agent that crosses cell membranes, allowing it to accumulate in healthy myocardial tissue proportional to blood flow.

In myocardial perfusion imaging, the heart's performance and the distribution of blood flow can be visualized, helping clinicians evaluate not only the presence of any abnormalities in blood flow but also the overall function of the heart. The imaging technique typically involves single-photon emission computed tomography (SPECT) after the injection of the radiopharmaceutical, providing detailed images of myocardial perfusion.

Other imaging types mentioned, such as brain scans, liver scans, and bone scans, involve different radiopharmaceuticals specifically tailored for those organs and their unique imaging requirements. Therefore, Tc tetrofosmin's distinct application in myocardial perfusion imaging differentiates it from the other options listed.