Lee B C, Kneeland J B, Walker R W, Posner J B, Cahill P T, Deck M D
AJNR Am J Neuroradiol. 1985 Mar-Apr;6(2):159-63.
Eighteen patients aged 4-72 years old with brainstem tumors were studied using a 0.5 T magnetic resonance (MR) imager and a third- or fourth-generation computed tomographic (CT) scanner. MR imaging showed the brainstem to be enlarged on sagittal views in all cases; exophytic growth was seen in eight. Alterations of signal intensities were shown in most cases on spin-echo sequences using 30 and 90 msec echo times and inversion recovery techniques. It was not possible to distinguish primary from metastatic tumors. The configurations and margins of the areas with abnormal signal did not appear to correlate with the clinical behavior of the tumors. CT was able to recognize brainstem tumor in only 13 of 16 cases. In the two cases of metastases, plain CT scans were normal, but enhancement was seen after administration of contrast material in one. It appears that MR imaging is sensitive in detecting tumor enlargement and abnormal signals and is superior to CT in evaluating brainstem tumors.
对18例年龄在4至72岁的脑干肿瘤患者，使用0.5T磁共振（MR）成像仪和第三代或第四代计算机断层扫描（CT）扫描仪进行了研究。MR成像显示，所有病例在矢状面上脑干均增大；8例可见外生性生长。多数病例在使用30毫秒和90毫秒回波时间的自旋回波序列以及反转恢复技术时显示出信号强度改变。无法区分原发性肿瘤和转移性肿瘤。信号异常区域的形态和边缘似乎与肿瘤的临床行为无关。CT仅在16例中的13例中识别出脑干肿瘤。在2例转移瘤病例中，平扫CT扫描正常，但1例在注射造影剂后可见强化。看来MR成像在检测肿瘤增大和异常信号方面很敏感，在评估脑干肿瘤方面优于CT。
