颅脑转移瘤的CT和MRI研究

The Study of CT and MRI Diagnosis of Brain Metastasis

134例颅脑转移瘤,CT增强薄层扫描88例,其中延迟扫描58例;薄层MRI 44例。114例(85％)有幕上转移,38例(28％)有幕下转移。73例(54％)多发,64例(46％)单发。增强MRI显示清晰和尚清晰者为42例(95％),增强后1～3min CT延迟扫描显示清晰和尚清晰者为55例(95％),延迟3min以上显示清晰和尚清晰为95％。可见,增强CT延迟扫描和大剂量增强CT对颅脑转移瘤的检出效果与增强MRI是相仿的。

A hundred and thirty four cases of brain metastases were collected. The 88 cases were studied with thin section of enhanced CT scan, including 58 cases with delayed CT scan. The 44 cases were studied with thin section of enhanced MRI. In 134 patients supratentorial metastases were found in 114 cases (85 % ) ,infratentorial metastases in 38 cases (28%). Multiple lesions were found in 73 cases (54%), single lesion in 64 cases (64%). In 44 patients performed by MR, the clear and more clear imagings of metastasis were obtained in 42 cases (95%). In 58 patients performed by delayed CT with 1 - 3 min, the clear and more clear imagings were obtained in 55 cases (95%). All patients clearly demonstrated lesions by delayed CT with more than 3 min. Contrast-enhanced CT with delayed scan and contrast-enhanced MR for the detection of brain metastases are much the same.