Question

In a normal In-111 WBC study performed 24 hours after tracer administration, which of the following organs will demonstrate the greatest tracer uptake?

1) Liver
2) Spleen
3) Kidneys
4) Lungs

Answer 1

The spleen will demonstrate the greatest tracer uptake in a normal In-111 WBC study performed 24 hours after tracer administration due to its immune functions and blood filtration role.

Step-by-step explanation:

In a normal In-111 WBC study performed 24 hours after tracer administration, the organ that will demonstrate the greatest tracer uptake is the spleen. White blood cells (WBCs), labeled with the tracer, tend to localize in areas of high lymphatic activity, which is characteristic of the spleen given its central role in the immune response and filtration of blood. In contrast, other organs like the liver, kidneys, and lungs would exhibit lower levels of tracer uptake under typical conditions without pathology. Additionally, radioisotopes such as In-111 are extensively used in medicine to visualize and diagnose conditions by using external detectors to measure emitted y radiation, with such imaging helping in the assessment of various bodily functions or the presence of diseases.