Ollivier Morgan, Wanono Emmanuelle, Leclercq Delphine, Domont Fanny, Trunet Stéphanie, Dormont Didier, Bertrand Anne
Department of Radiology, University Hospital Center, Hôpital de la Cavale-Blanche, F-29609 Brest Cedex, France; AP-HP, Pitié-Salpétrière Hospital, Department of Functional and Diagnostic Neuroradiology, F-75013 Paris, France.
AP-HP, Pitié-Salpétrière Hospital, Department of Internal Medicine, F-75013 Paris, France.
J Neurol Sci. 2015 Nov 15;358(1-2):505-6. doi: 10.1016/j.jns.2015.09.359. Epub 2015 Sep 25.
We report a case of posterior reversible encephalopathy syndrome (PRES) in which followed-up MRI demonstrated a transient reduction in venous signal on initial SWAN images. The progressive normalization of venous signal on D10 and D40 imaging paralleled the progressive decrease of hyperperfusion on CBF images. Decreased venous susceptibility has never been reported in PRES; it relates most likely to a transient BOLD effect induced by brain hyperperfusion.
我们报告了一例后部可逆性脑病综合征（PRES），随访磁共振成像（MRI）显示，最初的血氧水平依赖对比剂增强磁共振血管造影（SWAN）图像上静脉信号出现短暂降低。在第10天和第40天成像时静脉信号逐渐恢复正常，这与脑血流量（CBF）图像上高灌注的逐渐降低相平行。PRES中从未有过静脉磁化率降低的报道；这很可能与脑高灌注引起的短暂血氧水平依赖效应有关。
