Golden-ratio rotated stack-of-stars acquisition for improved volumetric MRI.

ABSTRACT:

Purpose

To develop and evaluate an improved stack-of-stars radial sampling strategy for reducing streaking artifacts.

Methods

The conventional stack-of-stars sampling strategy collects the same radial angle for every partition (slice) encoding. In an undersampled acquisition, such an aligned acquisition generates coherent aliasing patterns and introduces strong streaking artifacts. We show that by rotating the radial spokes in a golden-angle manner along the partition-encoding direction, the aliasing pattern is modified, resulting in improved image quality for gridding and more advanced reconstruction methods. Computer simulations were performed and phantom as well as in vivo images for three different applications were acquired.

Results

Simulation, phantom, and in vi

SUBMITTER: Zhou Z 

PROVIDER: S-EPMC5545174 | biostudies-literature | 2017 Dec

REPOSITORIES: biostudies-literature