What type of imaging is done with Tc HMPAO tagged WBCs?

• A. Cardiac imaging
• B. Infection imaging
• C. Metabolic imaging
• D. Cancer imaging

Answer: (B)

The imaging performed with Tc HMPAO tagged white blood cells is primarily focused on identifying infections within the body. This type of imaging takes advantage of the properties of technetium-99m (Tc-99m) and its ability to label white blood cells. When these labeled white blood cells are injected into a patient, they travel to sites of infection or inflammation, where they accumulate due to their role in the immune response.

This accumulation can then be visualized using nuclear imaging techniques such as SPECT (Single Photon Emission Computed Tomography). The high sensitivity of this method allows detectors to identify areas of increased white blood cell activity, effectively highlighting locations of infection or inflammatory processes that may not be easily seen through other imaging modalities.

In contrast, other types of imaging listed, such as cardiac, metabolic, or cancer imaging, utilize different radiopharmaceuticals and techniques tailored to visualize physiological functions, blood flow, or tumors, respectively. Thus, Tc HMPAO tagged white blood cells are specifically utilized for infection imaging, making this option the best choice.