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Abstract #1435

Phase-Enhancement Technique for a Hybrid-Of-Opposite-Contrast MR Angiography

Tokunori Kimura1, Masato Ikedo2

1MRI Systems Development Department, Toshiba Medical Systems , Otawara, Tochigi, Japan; 2MRI Systems Development Department, Toshiba Medical Systems, Otawara, Tochigi, Japan

We have proposed a MRA technique named Hybrid-of-Opposite-Contrast (HOP) MR Angiography combining time-of-flight (TOF) and flow-sensitive black-blood (FSBB) using dual-echo 3D gradient echo sequence, which was magnitude-based technique. For the purpose of further enhancing blood-to-background contrast, we proposed and assessed a new image processing technique employing corresponding phase maps for 1st echo (TOF) and 2nd echo (FSBB) so as to further enhance blood vessels white and black, respectively. Volunteer brain study was performed. Smaller vessels were further delineated by this technique than the standard magnitude-based HOP images.