Gentry L R, Jacoby C G, Turski P A, Houston L W, Strother C M, Sackett J F
Radiology. 1987 Feb;162(2):513-20. doi: 10.1148/radiology.162.2.3492010.
Capabilities of computed tomography (CT) and magnetic resonance (MR) imaging in the diagnosis of cerebellopontine angle-petromastoid (CPA-PM) lesions were compared in 75 patients. CT and MR demonstrated 95.8% and 98.7% of the lesions, respectively. MR was often more helpful for characterization of neuromas, epidermoid cysts, exophytic gliomas, and vascular lesions, while CT was usually more informative for meningiomas, metastases, and tympanomastoid cholesteatomas. A specific diagnosis could be made with MR for most types of lesions through use of relaxation parameters and characteristic morphologic changes. Size, shape, location, and contour of the lesions, however, were generally more helpful for differential diagnosis than relaxation times. With the exception of metastatic lesions, cholesteatomas, and some meningiomas, MR was usually more helpful than CT in defining the full extent of the lesions and their relationships to contiguous structures. MR, because of its high accuracy in lesion detection, characterization, and localization, is a suitable primary diagnostic modality for evaluating patients with suspected CPA-PM lesions.
对75例患者的计算机断层扫描（CT）和磁共振成像（MR）在桥小脑角-岩乳突区（CPA-PM）病变诊断中的能力进行了比较。CT和MR分别显示了95.8%和98.7%的病变。MR通常对神经瘤、表皮样囊肿、外生性胶质瘤和血管病变的特征描述更有帮助，而CT通常对脑膜瘤、转移瘤和鼓室乳突胆脂瘤的信息更丰富。通过使用弛豫参数和特征性形态学改变，MR可对大多数类型的病变做出特异性诊断。然而，病变的大小、形状、位置和轮廓通常比弛豫时间对鉴别诊断更有帮助。除转移瘤、胆脂瘤和一些脑膜瘤外，在确定病变的完整范围及其与相邻结构的关系方面，MR通常比CT更有帮助。由于MR在病变检测、特征描述和定位方面具有较高的准确性，因此是评估疑似CPA-PM病变患者的合适的主要诊断方法。
