Which radioisotope should be selected as a diagnostic tool in nuclear medicine, gamma emitters or alpha emitters? Why?

• A. Gamma emitters. Gamma rays can easily leave the body and do minimal damage as possible, while alpha particles that are ionizing and do not easily pass through the body.
• B. Gamma emitters. Gamma rays are penetrating and cannot easily leave the body hence doing minimal damage, while alpha particles are ionizing and easily pass through the body.
• C. Alpha emitters. Gamma rays can easily leave the body and do minimal damage as possible, while alpha particles that are ionizing and do not easily pass through the body.
• D. Alpha emitters. Gamma rays are penetrating and cannot easily leave the body while alpha particles are ionizing and easily pass through the body hence doing minimal damage.

Answer: (A)