Wang D, Zhang W, Xiong M, Yu M, Xu J
Department of CT & MRI, Air Force General Hospital, Beijing 100036, China.
Chin Med J (Engl). 2001 Oct;114(10):1015-8.
To evaluate the clinical applications and limitations of CT virtual endoscopy (CTVE) in the auditory ossicular chain.
CTVE of the auditory ossicular chain was performed with 1.0 mm collimation at pitch 1.0, bone algorithm, 9.6 cm field of view, and 0.1-0.2 mm reconstruction interval in 40 patients with middle ear diseases. 30 cases were confirmed by surgery. Results were compared with the findings of axial high resolution CT (HRCT) and multiplanar reformation (MPR) images and surgery.
The accuracy of CTVE images in detecting ossicular destruction was 92.6%, significantly higher than that of axial HRCT (83.9%) and multiplanar reformation (76.5%) images. CTVE could also clearly reveal the postoperative condition and congenital dysplasia of the auditory ossicular chain.
CTVE can clearly demonstrate a three-dimensional image of the auditory ossicular chain and is useful in evaluating diseases of the ear, especially the auditory ossicles. CTVE could not clearly demonstrate abnormal soft tissue within the tympanic cavity, abnormal changes of the tympanic membrane and tympanic walls, and could be easily influenced by artificial factors.
评估CT虚拟内镜（CTVE）在听骨链中的临床应用及局限性。
对40例中耳疾病患者采用1.0mm准直、螺距1.0、骨算法、9.6cm视野及0.1 - 0.2mm重建间隔进行听骨链的CTVE检查。30例经手术证实。将结果与轴位高分辨率CT（HRCT）、多平面重组（MPR）图像及手术结果进行比较。
CTVE图像检测听骨破坏的准确率为92.6%，显著高于轴位HRCT（83.9%）和多平面重组图像（76.5%）。CTVE还能清晰显示听骨链的术后情况及先天性发育异常。
CTVE能清晰显示听骨链的三维图像，对耳部疾病尤其是听小骨疾病的评估有帮助。CTVE不能清晰显示鼓室内异常软组织、鼓膜及鼓室壁的异常改变，且易受人为因素影响。
