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Abstract #1626

Clipped cerebral aneurysm evaluation with gradient modulated PETRA, preliminary study

Minoru Morikawa1, Hideki Ishimaru1, Yohei Ikebe1, Masataka Uetani1, Reiko Ideguchi2, Hiroshi Imai3, and Naoharu Kobayashi4
1Department of Radiology, Nagasaki University Hospital, Nagasaki, Japan, 2Department of Radioisotope Medicine, Atomic Bomb Disease Institute, Nagasaki University, Nagasaki, Japan, 3Siemens Healthcare K.K., Tokyo, Japan, 4Department of Radiology, University of Minnesota Medical School, Minneapolis, MN, United States

Gradient modulated pointwise encoding time reduction with radial acquisition sequence (GM-PETRA) is a new sequence, which can minimize metallic artifact caused by surgical clips. The GM-PETRA samples k-space more quickly by increasing the gradient amplitude after excitation while keeping a relatively low excitation bandwidth. GM-PETRA provides decrease the susceptibility artifact caused by a metallic implant such as surgical clip and can demonstrate the patency of parent artery adjacent to the surgical clip more clearly than conventional PETRA and TOF MRA.

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