Abstract
Nonlinear profile order for 3D hybrid radial acquisition applied to self-gated free-breathing cardiac cine MRI
Highlights
Self-gated free-breathing 3D cardiac cine MRI has been widely introduced, which provides similar image quality and functional measurements as breath-hold technique [1,2,3]
Methods aA previously developed hybrid radial sampling [2,3] was adapted for 3D cardiac cine imaging
Obvious streak artifact appears in the golden ratio based profile order, which is caused by non-uniform distribution of profiles
Summary
Self-gated free-breathing 3D cardiac cine MRI has been widely introduced, which provides similar image quality and functional measurements as breath-hold technique [1,2,3]. In self-gated free-breathing cardiac cine MRI, respiratory and cardiac motions are unpredictable during the acquisition especially in retrospective reconstruction. Nonuniform k-space distribution is a major problem in retrospective self-gated reconstruction. Optimal parameters in the nonlinear formula were chosen based on the simulations. These two profile orders were compared among k-space distribution, phantom and human image results. Nine normal subjects (32 ± 7 yo, 7 male) were imaged by both nonlinear profile order and goldenratio based scheme. The study was approved by the local institutional review board, and written informed consent was obtained from all subjects
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