Ishii K, Onuma T, Kinoshita T, Shiina G, Kameyama M, Shimosegawa Y
Department of Radiology, Sendai Japan City Hospital, Japan.
AJNR Am J Neuroradiol. 1996 Apr;17(4):731-5.
Four patients in whom brain deaths was identified on the basis of neurologic and electroencephalographic findings were examined with MR imaging and MR angiography. MR images showed diffuse swelling of the cerebral gyri and cerebellar cortex, which prolongation of both the T1 and T2 signal (representing hypoxic ischemic brain injury), downward displacement of the diencephalon and the brain stem (central and tonsillar herniation), and loss of flow void in the intracranial portions of both internal carotid arteries. MR angiograms did not show the intracranial vessels above the level of the supraclinoid portion of the internal carotid arteries. MR angiography and MR imaging are noninvasive and reliable methods for use in determining brain death.
对4例根据神经学和脑电图检查结果判定为脑死亡的患者进行了磁共振成像（MR成像）和磁共振血管造影（MRA）检查。MR图像显示脑回和小脑皮质弥漫性肿胀，T1和T2信号延长（提示缺氧缺血性脑损伤），间脑和脑干向下移位（中央疝和小脑扁桃体疝），双侧颈内动脉颅内段血流流空信号消失。MRA未显示颈内动脉床突上段以上的颅内血管。MRA和MR成像是用于判定脑死亡的无创且可靠的方法。
