Meeting Banner
Abstract #3815

Whole-Heart Coronary MR Angiography with 2D Parallel Imaging: Comparison of Two Cartesian Sampling Schemes with and Without CAIPIRINHA Reordering

Xiaoming Bi1, Randall Kroeker2, Johannes Breuer3, Sven Zuehlsdorff1, Peter Kellman4

1Siemens Healthcare, Chicago, IL, United States; 2Siemens Healthcare, Winnipeg, Canada; 3Siemens AG Healthcare, Erlangen, Germany; 4National Institute of Health, Bethesda, MD, United States

The goal of this work was to: 1) investigate the feasibility of whole-heart coronary MRA in consecutive volunteers using 2D CAIPIRINHA sampling strategy; 2) compare the efficacy of 2D CAIPIRINHA to conventional reordering with total acceleration of 8 (PE x PA = 4 x 2) and matched protocol. Preliminary results from five consecutive volunteer studies showed improved parallel imaging g-factor with CAIPIRINHA reordering as compared to conventional reordering (CAIPIRINHA: 1.52 0.05; Conventional: 1.85 0.17, p = 0.038).

Keywords

acceleration acceptance acquisition angiography array arrows arteries artery auto availability balanced beat becomes blue body calibrating channel circles circumflex cohort coil coils conditioned consecutive consent consistently consuming continues controlled coronary coverage covering cross curved datasets delineated demanding density depicted descending despite diastole displayed efficiently employed every exams excitation exploited explore feasibility five fold foot gating generated geometry good green head health healthy heart identical illustrated improved included informed institute interpolation investigate isotropic kernel largely manner maps matrix measured minutes modified namely national navigator need optimized oversampling pairs parallel part partial partition patient peter physiological placed practical prescribed prescription previous procedure profile quality random readout receiver reconstruction reduced reformatted reordering representative requirements resolution respectively respiratory routine sample sampling scanner scheme schemes section selected sensitivity separate setting sharply shortens spatial start strategies strategy studies subject subjects substantially successfully synchronized tailed typical utilized variations vessels views visually volume volumetric volunteer warrants whole window yellow