18.下列何種檢查最適合用來區別病人為原發性顫抖症（essential tremor）或是巴金森氏症候群（Parkinsonian syndrome）？
(A)¹⁸F-FDG PET
(B)^99mTc-HMPAO SPECT
(C)¹²³I-IMP SPECT
(D)^99mTc-TRODAT-1 SPECT

原發性顫抖(essential trem...