ふるえる

A Diagnostic Imaging Approach for Tremor

ふるえ（振戦）は日常臨床でしばしば遭遇する病態であるが，ふるえをきたす疾患は多岐にわたり，画像検査は診断に大きな役割を担う。MRIによる形態や信号変化，神経メラニン，鉄沈着による評価に加えて，核医学検査による心臓交感神経やドパミントランスポーターを評価することで病態の本質に迫ることが可能となる。本論ではMRIや核医学検査の役割や適応，読影の際の注意点について概説する。

Abstract

Tremor is one of the common movement disorders encountered in a clinical practice. Tremor is often difficult to diagnose and can be easily mistaken for another disorder, hence diagnostic imaging is employed to provide objective information. The morphometry, signal changes, neuromelanin, and iron deposition can be evaluated by MRI, whereas cardiac sympathetic nerve and dopamine transporter degeneration are detected by means of nuclear medicine. The purpose of this article is to provide an overview of the role and indications of imaging test, as well as a review of the methods in which the findings of images are interpreted.