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.