Radiopharmaceuticals for Molecular Imaging — MCQs

Which of the following statements best describes the mechanism of action of insulin on target cells?

Hot spot in heart is seen in which scan

Which of the following is used in the treatment of well-differentiated thyroid carcinoma?

Radiation-induced necrosis can be diagnosed by:

Which radioisotope is PRIMARILY used for detecting acute myocardial infarction rather than assessing myocardial perfusion?

Radiopharmaceutical used for phagocyte study scan:

Technetium-99m methylene diphosphonate is structurally similar to

A research team is developing a new radiotracer for imaging hypoxia in tumors. They need to select between 18F-labeled and 64Cu-labeled versions of the same molecule. Considering half-lives (18F: 110 min, 64Cu: 12.7 hours), positron ranges, and clinical applicability, which choice and rationale is most appropriate?

In designing a clinical protocol for PSMA PET imaging in prostate cancer, which combination of factors would provide optimal image quality while minimizing radiation exposure?

A patient with treated breast cancer shows a liver lesion on CT. FDG-PET shows SUVmax of 2.8 in the lesion. Follow-up scan after 3 months shows increase in size but SUVmax decreased to 1.9. What is the most likely explanation?