Bronen R A
Department of Diagnostic Radiology, Yale University School of Medicine, New Haven, CT 06510.
AJR Am J Roentgenol. 1992 Dec;159(6):1165-74. doi: 10.2214/ajr.159.6.1442376.
MR is the imaging technique of choice when examining a patient who is having seizures. Detection, localization, and differentiation of structural epileptogenic abnormalities are much better with MR imaging than with CT. MR imaging has a high success rate in identifying hippocampal sclerosis, a common cause of surgically treatable temporal lobe epilepsy. The affected hippocampus is atrophic and hyperintense on long TR images. Functional imaging with single-photon emission computed tomography and positron emission tomography is complementary to MR imaging but is not as widely available. In summary, MR imaging has dramatically changed the workup of epilepsy, especially for the patient with medically uncontrollable seizures. As surgical treatment of epilepsy becomes more available, the need for preoperative evaluation with MR imaging will increase.
当检查癫痫发作的患者时，磁共振成像（MR）是首选的成像技术。对于结构性致痫异常的检测、定位和鉴别，MR成像比CT要好得多。MR成像在识别海马硬化方面成功率很高，海马硬化是外科可治疗的颞叶癫痫的常见病因。在长TR图像上，受影响的海马萎缩且信号增强。单光子发射计算机断层扫描和正电子发射断层扫描的功能成像可作为MR成像的补充，但应用不如MR成像广泛。总之，MR成像极大地改变了癫痫的检查方法，尤其是对于药物治疗无法控制癫痫发作的患者。随着癫痫外科治疗的普及，术前进行MR成像评估的需求将会增加。
