Elster A D, DiPersio D A
Department of Radiology, Bowman Gray School of Medicine, Winston-Salem, NC 27103.
Radiology. 1990 Jan;174(1):93-8. doi: 10.1148/radiology.174.1.2294578.
To define duration and patterns of postoperative contrast material enhancement, the authors evaluated magnetic resonance (MR) images obtained with gadolinium diethylenetriaminepentaacetic acid (DTPA) in 46 patients who had undergone major intracranial surgery. Intervals between surgery and MR imaging ranged from 1 day to 40 years (median, 1.3 years). Moderate or marked brain and dural enhancement was noted in nearly every patient imaged within 3 months of surgery, but all brain enhancement was gone by 1 year. Abnormal dural enhancement was noted in every patient imaged within 1 year of surgery and in approximately 50% at 1-2 years afterward. One patient had persistent mild enhancement of the dura 40 years after surgery. MR images revealed enhancement in several sites not frequently recognized on computed tomographic (CT) scans. Brain and meningeal enhancement with Gd-DTPA at cranial operative sites was more extensive and persisted much longer than is commonly seen on contrast-enhanced CT scans. Enhancement of the brain or pia mater does not normally last beyond 1 year, but dural enhancement may persist for decades.
为了明确术后对比剂强化的持续时间和模式，作者评估了46例接受大型颅内手术患者使用钆二乙烯三胺五乙酸（DTPA）获得的磁共振（MR）图像。手术与MR成像之间的间隔时间为1天至40年（中位数为1.3年）。在术后3个月内进行成像的几乎每例患者中均观察到中度或明显的脑和硬脑膜强化，但所有脑强化在1年内消失。在术后1年内进行成像的每例患者中均观察到异常硬脑膜强化，术后1至2年约50%的患者出现异常硬脑膜强化。1例患者在术后40年硬脑膜仍有持续的轻度强化。MR图像显示在计算机断层扫描（CT）上不常识别的几个部位有强化。颅骨手术部位使用钆喷酸葡胺的脑和脑膜强化比对比增强CT扫描中常见的情况更广泛且持续时间更长。脑或软脑膜的强化通常不会持续超过1年，但硬脑膜强化可能持续数十年。
