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Abstract #2675

Target volume coronary MRA revisited: Usefulness of non-rigid reregistration of multi-frame 3D MRA acquisitions at 3T

Masaki Ishida 1 , Ryohei Nakayama 1 , Shinichi Takase 1 , Katsuhiro Inoue 1 , Yoshitaka Goto 1 , Yasutaka Ichikawa 1 , Motonori Nagata 1 , Kakuya Kitagawa 1 , and Hajime Sakuma 1

1 Radiology, Mie University Hospital, Tsu, Mie, Japan

Target-volume coronary MRA can visualize coronary arteries within a predefined target volume within a shorter acquisition time compared to whole-heart coronary MRA. Relatively small SLAB volume of this approach permits acquisitions of multi-frame 3D data without prolonging scan duration. Recently, non-rigid image registration has been emerged as a technique which can merge images and improve SNR and CNR. Multi-frame 3D acquisitions and non-rigid image reregistration allow for acquisition of free-breathing target-volume 3T coronary MRA covering entire coronary arteries with the image quality that is superior to the single-frame acquisition, within a significantly shorter acquisition time compared to whole-heart coronary MRA.

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