摘要
目的 探讨听骨链CT仿真内窥镜 (CTVE)成像技术的初步临床应用价值。方法 使用HiSpeedCT/i扫描机 ,层厚 1 0mm、螺距 1 0、骨算法、视野 9 6cm× 9.6cm、间隔 0 1mm重建 ,对 10例正常中耳和 2 1例临床怀疑中耳病变 (14例手术 )的患者进行CTVE成像。正常及异常中耳的观察阈值分别为 - 6 0 0～ - 2 0 0HU和 5 0～ 30 0HU。结果 CTVE能清楚显示正常听骨链的形态、大小及相互关系 ,锤骨、砧骨及锤砧关节的显示率为 10 0 % (38/38) ,镫骨底板的显示率为 32 % (12 /38) ,只有 2 1%(8/38)可以分辨镫骨的前、后脚 ;18例中耳炎患者中 12例胆脂瘤形成 ,CTVE上有不同程度的听小骨破坏。 1例中耳畸形显示听骨链发育异常。结论 CTVE是一种新的、非侵袭性的方法 ,能显示听骨链的立体影像 。
Objective To evaluate the ability of CT virtual endoscopy (CTVE) in visualization of auditory ossicular chain and its clinical application. Methods CTVE of auditory ossicular chain was performed on GE HiSpeed CT/i with 1.0 mm slice thickness at pitch 1.0, bone algorithm, 9.6 cm FOV, and 0.1 mm reconstruction interval in 10 normal subjects and 21 patients with middle ear diseases, 14 of them were proved by operation. The threshold values for normal and abnormal auditory ossicular chain were -600～-200 HU and 50～300 HU respectively. Results CTVE could clearly demonstrate the shape, size, and relation of the normal auditory ossicular chain. A visualization rate of malleus, incus, and incudomalleal articulation was 100%, and was 32% for the stapedial footplate. However, in only 21% could the anterior and posterior crura of stapes be distinguished. Cholesteatoma was found in 12 cases with chronic otitis media, in which CTVE demonstrated varying degrees of destruction of the auditory ossicle. In 1 case with congenital anomaly, ossicle dysplasia was seen. Conclusion CTVE being a new, non invasive method for demonstrating the three dimensional image of auditory ossicular chain is useful in evaluating diseases of the ear, especially the auditory ossicles.
出处
《中华放射学杂志》
CAS
CSCD
北大核心
2000年第7期459-461,共3页
Chinese Journal of Radiology
关键词
听骨链
CT仿真内窥镜成像
临床应用
Ear ossicles
Tomography, X-ray computed
Endoscopy
Computers,analog
