甲状腺功能障碍性视神经病变的影像学研究进展

甲状腺功能障碍性视神经病变（ DON）是甲状腺相关眼病（ TAO）引起视神经功能损害的严重并发症，主要由眶内肿胀的眼外肌压迫眶尖视神经所致。早期诊治对疾病的疗效和预后至关重要。眼眶影像学检查在DON的诊断和评估上发挥着重要的作用，可以显示眼眶组织解剖结构，评估疾病分期及疗效，还能帮助识别倾向于发展为DON的患者。本文回顾了DON的病因、临床特征和影像学，着重对DON的影像学研究进行综述，包括CT、MRI和多普勒超声研究。

Imaging studies for dysthyroid optic neuropathy

enlarged extraocular muscles .Early diagnosis and timely treatment is essential for the curative effect and prognosis of the condition , and therefore avoiding permanent visual loss .Orbital imaging examination plays an important role both in the di-agnosis and assessment of DON .Imaging studies can be used to evaluate morphological abnormalities of the orbital struc-tures, to distinguish the inflammatory early stage from the inactive stage of the disease , and to monitor therapeutic re-sponse.Further, imaging studies can be of great help in identifying patients prone to develop dysthyroid optic neuropathy . This paper reviews the etiology , clinical features and imaging studies of DON , with special emphasis on the imaging stud-ies, including computed tomography , magnetic resonance imaging , and Doppler ultrasound .