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Abstract #4508

High-resolutional visualization of the lenticulostriate artery: Application of compressed sensing for faster acquisition

Tomohisa Okada 1 , Koji Fujimoto 1 , Yasutaka Fushimi 1 , Akira Yamamoto 1 , Kei Sano 2 , Toshiyuki Tanaka 2 , Naotaka Sakashita 3 , and Kaori Togashi 1

1 Dept. of Diagnostic Imaging and Nuclear Medicine, Kyoto University Graduate School of Medicine, Kyoto, Kyoto, Japan, 2 Department of Informatics, Kyoto University Graduate School of Informatics, Kyoto, Kyoto, Japan, 3 Toshiba Medical Systems, Otawara, Tochigi, Japan

Visualization of the lenticulostriate artery (LSA) using TOF-MRA requires high resolution and takes long acquisition time, which might be mitigated by under-sampling and compressed sensing (CS) reconstruction. However, application of CS to small structures such as LSA is yet to be investigated. CS-reconstructed images of 25, 50 and 75% data were compared with the full-sampled images in 11 volunteers. Under-sampling of 75% data was comparable to the control, but visualization was impaired at 50% and 25%. Higher contrast between LSA and background, as well as improved CS reconstruction, would be required for LSA visualization.

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