摘要
目的探讨听骨链和迷路螺旋ＣＴ三维重建技术的临床应用和局限性。方法采用薄层螺旋扫描（层厚１．０ｍｍ）、小视野（ＦＯＶ＝５ｃｍ）、密集重建（间隔０．１ｍｍ）技术，对１４例正常和１５例中耳病变患者行听骨链和迷路三维重建成像，包括多平面重组（ＭＰＲ）、最小密度或最大密度投影（ＭｉｎＩＰ或ＭａｘＩＰ）和表面成像（ＳＳＤ）。结果１４例正常患者中对其中１３例听骨链及８例迷路进行三维重建，听骨链重建显示锤骨柄和砧骨长突平行共同指向蜗岬，砧镫关节呈“Ｌ”形影，迷路三维重建显示耳蜗和三个半规管。１３例中耳炎患者中９例胆脂瘤形成，显示听骨链不同程度的破坏，２例先天中耳畸形显示听骨链发育异常。结论螺旋ＣＴ三维重建技术有利于中耳畸形和其他耳部病变的诊断，但尚存在重建时间长、损失部分信息等缺点，有待进一步改善。
Purpose To assess the clinical application and limitation of 3D spiral CT of the auditory ossicular chain and labyrinth. Methods 3D reconstruction of the auditory ossicular chain and labyrinth, including multiplanar reformation (MPR), minimum or maximum intensity projection (MinIP or MaxIP) and shaded surface display (SSD), were performed with 1mm slice thickness, 5cm field of view and 0.1mm reconstruction interval spiral CT in 14 normal subjects and 15 patients with middle ear diseases. Results With use of 3D reconstruction images in 14 normal subjects, 13 cases of ossicular chain showed that the long process of the incus was parallel to the manubrium and projected inferomedially toward the cochlear promontory, the incus stapedial joint was like a “L shape” structure, and in 8 cases of labyrinth reconstruction, the cochlea and the three semicircular canals were demonstrated. 9 cholesteatomas of 13 chronic otitis media demonstrated destruction of ossicular chain of varying degrees. In 2 cases with congenital abnormalies, ossicle dysplasia was seen. Conclusion 3D CT is a useful technique for evaluating anatomic malformations and diseases of middle and inner ear, but there are still few pitfalls.
出处
《中华放射学杂志》
CAS
CSCD
北大核心
1998年第10期678-680,共3页
Chinese Journal of Radiology
关键词
听小骨
迷路
CT
听骨链
三维重建
Ear ossicles Labyrinth Tomography,X ray computed
