Meeting Banner
Abstract #3034

Benefits of Spiral Imaging for Arterial Spin Labeling as Compared to EPI

Britta Lehmann1, Tiejun Zhao2, Josef Pfeuffer1

1Siemens Healthcare, MR Application Development, Erlangen, BY, Germany; 2Siemens Healthcare, Pittsburg, PA, United States

The most common imaging methods for PASL are EPI and spiral imaging. Segmenting the spiral trajectory into two interleaved spirals reduces the duration of each spiral and therefore blurring by off resonance effects. In this work, an approach with a one and a two-segmented spiral in comparison to full and partial k-space EPI were evaluated in terms of SNR and the impact of artifacts (off resonance, physiology) of the ASL signal. PICORE-PASL data from subjects were acquired in human subject at 3T. In conclusion, the two-segmented spiral method provided the bests result with regard to artifacts and SNR for PASL.

Abstract PDF

Keywords

according achieved acquisition advantages appearances application around arterial artifact artifacts audience balanced beneficial benefits best blipped blood blurring calculation canal cerebral clinical control correction counteract dampen decrease deficit designed development deviation distortions dividing done duration durations encode engineers evaluated exhibits expense fast flow full functions gain goal hand highest human important induce induced inhomogeneities label labeling least like likely loss matching matrix modules motion much noise nominal normalized often pace pairs partial perfusion physicists physiologically physiology pixel planar practically practice principally prior pronounced pulsed quality radial readout reasonable reduces reducing reduction regional relevant resolution sacrificed sampling saturation scaled scaling segmentation segmented segments series shortened shorter shot significantly since smoothing space spin spiral spirals spread straightforward subject subjects terms tips wise