Meeting Banner
Abstract #1034

Evaluation of the Pre- & Post-Treatment Hemodynamics of Dural Arteriovenous Fistula (DAVF) Using Magnitude Image of Susceptibility Weighted Imaging (SWI).

Toshiteru Miyasaka1, Toshiaki Taoka2, Tomoko Ochi2, Toshiaki Akashi2, Kaoru Myochin2, Takeshi Wada2, Katsutoshi Takayama2, Hiroyuki Nakagawa1, Kimihiko Kichikawa2

1Department of Radiology, Nara prefectural Nara hospital, Nara, Japan; 2Department of Radiology, Nara medical university, Kashihara, Nara, Japan

Magnitude images of SWI depicted the majority of the draining veins of dAVF as much bright intensity as TOF MRA. Draining veins, which disappeared on angiography after the treatment, showed lower signal intensity than before treatment on magnitude images and TOF MRA. We speculate that higher concentration of oxy-Hb within draining veins is one of the causes of high signal intensity on magnitude images and the signal intensity was lower after the treatment due to decreased velocity and lower concentration of oxy-Hb on magnitude images.

Abstract PDF Poster PDF

Keywords

aged angiography asses bright cerebral comparing completely concentration decreased degree dizziness draining evaluate evaluation fistula flash hemorrhage hosp hunt identified intensity japan magnitude majority male materials medical moderate much owed post proven radiology residual seven shunt susceptibility swim treatment undergone vein veins velocity venous