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

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.

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.

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.

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.