Yiping P. Du1, Zhaoyang Jin2,3
1Psychiatry, Radiology, University of Colorado Denver, Aurora, CO, USA; 2Institute of Information and Control, Hangzhou Dianzi University, Hangzhou, Zhejiang, China; 3Biomedical Engineering, Zhejiang University, Hangzhou, Zhejiang, China
An image-domain high-pass filtering with second-order phase difference is proposed to enhance the visibility of venous vasculature and suppress the off-resonance artifact in regions with severe field inhomogeneity in susceptibility weighted imaging (SWI). Using this filtering technique, 3D venography with positive venous contrast is generated. A Fermi weighting function is used to suppress the noise in air. The proposed filtering approach circumvents the signal loss commonly observed in the minimum-intensity projection of 3D SWI data processed with a conventional procedure.