Ali Q M
Faculty of Medicine, University of Gezira, Sudan.
East Afr Med J. 1990 Nov;67(11):794-800.
Plain films capable of demonstrating the composite shadow of the ossicular chain included the 105 degrees base, the lateral oblique of Meyer or Owen, the anteroposterior transtemporal of Chausse and the anteroposterior transorbital of Guillen. The stapes and the incudostapedial joint can not be shown with plain films. The hypocycloidal anteroposterior or Guillen is the best of tomograms and may be supplemented by lateral, inclined lateral or basal examinations. The individual ossicles, including the stapes can be demonstrated as well as the incudostapedial joint. Axial and coronal cuts with high resolution computed tomography (HRCT) demonstrate with clarity all ossicular parts commonly involved in otologic pathology. Conventional tomography and HRCT are complementary in all other temporal bone structures but the latter proved superior in ossicular visualization.
能够显示听骨链复合影的平片包括105度基底位、迈耶或欧文氏侧斜位、肖斯氏颞骨前后位和吉伦氏眶前后位。镫骨及镫骨砧骨关节不能用平片显示。眼眶前后轴位或吉伦氏位是体层摄影中最佳的，也可辅以侧位、斜侧位或基底位检查。包括镫骨在内的各个听小骨以及镫骨砧骨关节均可显示。高分辨率计算机断层扫描（HRCT）的轴位和冠状位切面能清晰显示耳科病理学中常见的所有听骨部分。传统体层摄影和HRCT在所有其他颞骨结构方面是互补的，但后者在听骨显示方面更具优势。
