皮肌炎 (DM)是一种皮肤和肌肉的弥漫性炎性疾病，临床表现多样，症状轻重不一，早期诊断时有困难。鉴于磁共振成像 (MRI)对软组织及其炎症有很好的分辨率，且可任意平面成像。为此我们对 18例早期 DM(包括 1例重叠综合征 SLE＋ DM)患者髋部和大腿肌肉进行了 MRI检查，以探讨 MR Dermatomyositis (DM) is a diffuse inflammatory disease of the skin and muscles. It has various clinical manifestations and different symptoms. It is difficult to diagnose early. In view of magnetic resonance imaging (MRI) of soft tissue and its inflammation have a good resolution, and can be any plane imaging. To this end, we performed MRI examination of the hip and thigh muscles of 18 patients with early DM (including 1 case of overlap syndrome SLE + DM) to explore MR