Tzen Kai-yuan, director of NTUH's Department of Nuclear Medicine, says that in order to rapidly grow and reproduce, cancer cells absorb and metabolize two to 30 times more nutrients than ordinary cells. PET scans take advantage of this fact.
台大醫院核子醫學部主任曾凱元表示，與正常細胞相較，癌細胞為了快速增生、繁殖，因此需要吸收、代謝較多（2 至 30 倍）的養分。