Radiation Safety in Nuclear Medicine — MCQs

Radiation mediates its effect by

One gray equals

A pregnant woman with head trauma requires a CT scan of the head. What is the most effective radiation protection measure for the fetus?

Which of the following is most radioresistant?

In the context of medical imaging, which parameter of electromagnetic radiation remains constant?

The substance most commonly used for protection against X-ray radiation is?

A woman with endometrial carcinoma is undergoing radiotherapy. Which of the following statements about radiation therapy is true?

What is the best investigation to check for extra thyroid spread of thyroid gland neoplasm ?

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?