Abstract #1921

Silent Susceptibility Weighted MR Angiography; Clinical and Phantom Study

Takuya Fujiwara¹, Yoshiyuki Watanabe¹, Hisashi Tanaka¹, Hiroto Takahashi¹, Atsuko Arisawa¹, Chisato Matsuo¹, Masahiro Fujiwara¹, Tetsuya Wakayama², Pauline Worters², Christopher J Hardy³, and Noriyuki Tomiyama¹

¹Diagnostic and Interventional Radiology, Osaka University Graduate School of Medicine, Suita, Japan, ²GE Healthcare, MR Collaboration and Development, Tokyo, Japan, ³GE Global Research, Niskayuna, NY, United States

We compared silent susceptibility-weighted angiography (SWAN) with conventional SWAN (cSWAN) in the depiction of hemorrhagic lesions. We measured acoustic noise and performed phantom and clinical study using silent SWAN, cSWAN, and T2*-weighted images (T2*-WI). Acoustic noise of silent SWAN was significantly lower compared to cSWAN. In clinical and phantom study, the contrast-noise ratio (CNR) for silent SWAN and cSWAN were similar. The CNR for T2*-WI was lower than them. In clinical study, imaging quality was almost the same. T2*-WI had more artifact. Conventional SWAN may be replaced with silent SWAN which yields comparable imaging quality and lower acoustic noise.

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