Brant-Zawadzki M, Badami J P, Mills C M, Norman D, Newton T H
Radiology. 1984 Feb;150(2):435-40. doi: 10.1148/radiology.150.2.6691098.
Twenty-six patients with primary intracranial tumors were evaluated by magnetic resonance (MR) and a comparison was made with CT findings. The SE technique with TR = 2,000 ms and TE = 56 ms was most useful in delineating normal anatomy, in differentiating gray and white matter, and in optimizing the visualization of edema. The use of TR = 500 ms optimized sensitivity to T1 relaxation time differences in disparate tissue and best defined the cerebrospinal fluid spaces. Although prolongation of T1 and T2 relaxation values was seen with most malignant lesions, several cases produced no obvious prolongation of T1. Separation of tumor from surrounding edema was possible in several instances. In 16/26 patients information not available on CT was obtained with MR. This included detection of altered tissue characteristics where CT showed only mass effect, more accurate depiction of full extent and location of tumor, and visualization of associated abnormalities. However, a small inner ear epidermoid tumor seen with high-resolution CT (1.5-mm sections) was difficult to identify with certainty on MR, and in two other cases punctate foci of calcification were not identified on MR.
对26例原发性颅内肿瘤患者进行了磁共振（MR）评估，并与CT检查结果进行了比较。采用TR = 2000 ms、TE = 56 ms的自旋回波（SE）技术，在描绘正常解剖结构、区分灰质和白质以及优化水肿的可视化方面最为有用。使用TR = 500 ms可优化对不同组织中T1弛豫时间差异的敏感性，并能最佳地显示脑脊液间隙。虽然大多数恶性病变可见T1和T2弛豫值延长，但有几例T1未见明显延长。在一些情况下能够将肿瘤与周围水肿区分开来。在26例患者中有16例通过MR获得了CT未提供的信息。这包括在CT仅显示占位效应时检测到组织特征的改变、更准确地描绘肿瘤的完整范围和位置以及显示相关异常情况。然而，高分辨率CT（1.5毫米层厚）显示的一个小的内耳表皮样囊肿在MR上难以确切识别，另外两例中的点状钙化灶在MR上未被发现。
