中内耳多层螺旋CT扫描技术的临床价值  

Diagnostic value of multi-slice spiral CT for lesions in middle and inner ears

作　　者：陈轶[1] 戚跃勇[1] 廖翠微[1] 刘卫金[1] 

机构地区：[1]第三军医大学新桥医院放射科,重庆400037

出　　处：《第三军医大学学报》2008年第16期1505-1507,共3页Journal of Third Military Medical University

摘　　要：目的探讨多层螺旋CT(MSCT)容积重建技术(VR)和多平面重建成像技术(MPR)显示成人中内耳结构的方法。方法采用MSCT薄层扫描(层厚0.625mm)、小视野(9.6mm)、密集重建(间隔0.3mm),细小骨关节(bone plus)重建,对耳鼻咽喉科诊治的患者15例(30只耳)和正常成人11例(22只耳)中内耳分别进行VR和MPR三维成像。结果正常40只耳,其VR图像显示了内耳骨迷路的细微结构,以及各结构之间的关系;异常12只耳,其中3只耳砧骨长腿异常,1只耳外半规管侵蚀,2只耳锤骨发育不全,2只耳砧镫关节消失,2只耳外耳道闭锁伴听小骨发育不全,2只耳镫骨前后脚发育异常,配合中耳MPR可更直观、准确地诊断。病变耳立体显示了畸形部位及程度。VR操作较复杂,图像立体感强;MPR操作相对简单,尤其对听骨链显示简捷明了。结论VR和MPR三维成像相结合能全面准确地观察中内耳的解剖结构。Objective To assess the clinical value of multi-slice CT （MSCT） in showing the ear lesions. Methods MSCT high resolution scan images of 52 ears of 11 normal adult and 15 patients with hearing loss were reconstructed, by bone plus with 0.625 mm collimation, 9.6 cm small field of vision （FOV） and 0.3 mm reconstruction interval before volume rendering （VH） and muhiplanar reformation （MPR） were performed. Results VR, MIP and MPR images of 40 normal ears clearly showed the complicated anatomic structures. VR, MIP and MPR images of twelve abnormal ears displayed 3 ears of malformations of crus longum incudis, 1 ear of destructed semicircular canals, 2 ears of malleus dysplasia, 2 ears of fusion of incudostapedial joint, 2 ears of bony atresia of external auditory complicated with auditory ossicles dysplasia, and 2 ears of crus stapedis dysplasia. MPR is easier to manipulate than VR that has three dimensional effect butis difficult to handle. Con- clusion HRCT images, combined with post-processing technique of VR, MIP and MPR, can clearly show the anatomic structures and lesions of middle and inner ears.

关 键 词：内耳 迷路 体层摄影术 X线计算机 三维成像 

分 类 号：R764.204[医药卫生—耳鼻咽喉科] R764.304[医药卫生—临床医学]