目的 探讨上半规管裂在HRCT上 的影像表现及特点，提高对该病HRCT表 现的认识。方法 回顾性分析10例被临床 明确诊断为上半规管骨裂的患者HRCT图 像，观察其形态、病变位置及与周围结 构的关系，分析其影像学表现特点。结 果 10例患者均在HRCT轴位图像上显示部 分骨质缺损，单侧8例(右侧6例，左侧 2例)，双侧2例，单侧以右耳居多，占 75%。其中5例位于顶壁内后侧，2例位于 顶壁前外侧，2例发生在顶壁正中部， 1例位于壶腹部，病变基本位于颞骨弓 状隆起附近(占90%)，其它部位少见(占 10%)。结论 HRCT在上半规管骨裂诊断中 具有重要的价值。

Objective To explore the imaging performance and characteristics of superior semicircular canal bony dehiscence with HRCT. Methods A retrospective study was conducted on 10 patients who were clinically diagnosed as superior semicircular canal bony dehiscence with HRCT images and observed the morphology, location and relationship with the surrounding structures and analysis of the imaging manifestations. Results 10 cases of patients were on axial HRCT image display part of the bone defect, 8 cases of unilateral (right side in 6 cases, 2 cases of left), and 2 cases were bilateral, unilateral to the majority of the right ear, accounted for 75%. Which 5 cases is located at the top of the wall side, 2 cases is located at the top of the anterolateral wall, 2 cases occurred at the top of the wall in the center, 1 case in the ampullary region, the lesions located near the arcuate eminence of temporal bone (90%), other parts of the rare (10%). Conclusion HRCT has an important value in the diagnosis of superior semicircular canal bony dehiscence.