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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