a. True. The dose to an organ increases in proportion to the following:
i. The effective half-life
ii. The fraction taken up by the organ
iii. The activity administered to the patient
iv. The energy of alpha and beta radiation emitted.
b. False.
c. False. Breast-feeding should be avoided for 24 h.
d. True.
e. False. The number of images taken is independent of the dose to the patient in nuclear medicine examination.