Which term describes the evaluation of heart muscle perfusion using stress and rest imaging?

• A. Cardiac NM Studies
• B. Lung NM Studies
• C. Thyroid Uptake Study
• D. Gastrointestinal NM Studies

Answer: (A)

Evaluating heart muscle perfusion with stress and rest imaging is described as a cardiac nuclear medicine study. In this approach, a radiotracer is injected and images of the heart are captured both during stress (exercise or pharmacologic) and at rest. By comparing the two sets of images, physicians can see how well different regions of the heart are perfused under increased demand. Areas that show reduced uptake during stress but normalize at rest indicate reversible ischemia, while persistent defects may reflect scar tissue from a prior infarction. This technique uses nuclear imaging methods like SPECT or PET to visualize perfusion and is distinct from studies of other organs such as the lungs, thyroid, or gastrointestinal tract.