Whole-heart coronary MR angiography using a 3D cones phyllotaxis trajectory.

ABSTRACT:

Purpose

To develop a 3D cones steady-state free precession sequence with improved robustness to respiratory motion while mitigating eddy current artifacts for free-breathing whole-heart coronary magnetic resonance angiography.

Method

The proposed sequence collects cone interleaves using a phyllotaxis pattern, which allows for more distributed k-space sampling for each heartbeat compared to a typical sequential collection pattern. A Fibonacci number of segments is chosen to minimize eddy current effects with the trade-off of an increased number of acquisition heartbeats. For verification, phyllotaxis-cones is compared to sequential-cones through simulations, phantom studies, and in vivo coronary scans with 8 subjects using 2D image-based navigators for retrospective motion co

SUBMITTER: Malave MO 

PROVIDER: S-EPMC6715422 | biostudies-literature | 2019 Feb

REPOSITORIES: biostudies-literature