Question

what is the medical specialty that studies the characteristics and uses of radioactive substances in diagnosis of disease

radiology
nuclear medicine
radiation oncology
ultrasonography

Explanation:

Analyze the question stem

The question asks for the medical specialty studying characteristics and uses of radioactive substances in diagnosis.

Define the options using medical terminology

We apply Medical Terminology to evaluate each choice:

• Radiology: Broad field using imaging (X-rays, MRI, CT) to diagnose disease.
• Nuclear medicine: Specifically uses radioactive substances (radiopharmaceuticals) inside the body for diagnosis and treatment.
• Radiation oncology: Uses radiation to treat cancer, not primarily for diagnosis.
• Ultrasonography: Uses high-frequency sound waves, involving no radiation.

Identify the correct specialty

The use of radioactive substances for diagnosis is the definition of nuclear medicine.

Answer:

• Radiology
• Nuclear medicine (Correct answer)
• Radiation oncology
• Ultrasonography