試題詳解

75.PET系統所偵測到的訊號之random coincidence rate的定義為何？（假設每一支detector的偵測效率皆相同， Rs: single channel noncoincidence rate, Rt: random coincidence count rate, ∆T: coincidence timingwindow）
(A)Rt=∆T×Rs
(B)Rt=∆T×Rs×Rs
(C)Rs=∆T×Rt
(D)Rs=∆T×Rt×Rt