Introduction To Radiologic Technology Practice Test

Radioisotopes in Nuclear Medicine are attracted to which areas?

Areas with healthy tissue Areas with high calcium Areas of high blood flow Areas currently in disease process

Correct Answer:

Areas currently in disease process

Explanation:

Radioisotopes used in nuclear medicine are taken up by tissues where physiology is altered by disease. They concentrate in areas with active disease processes—high metabolic activity, inflammation, infection, or tumor growth—so the tracer highlights regions of disease rather than normal tissue. For example, tracers like FDG accumulate in cells with increased glucose metabolism, common in cancer, and bone-seeking tracers highlight sites of active bone remodeling due to metastasis or fracture. Delivery depends on blood flow, but uptake reflects the underlying disease activity, making areas currently in disease process the best description of where the radiopharmaceutical localizes.

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