Back to Search Start Over

Rosette Trajectories for Fast MRI Based on an Adaptive Reconstruction Method

Authors :
Qiaoyu Tian
Xu Wen
Xiaomei Yang
Jin Xu
Kai Liu
Source :
IEEE Access, Vol 9, Pp 35164-35177 (2021)
Publication Year :
2021
Publisher :
IEEE, 2021.

Abstract

Non-Cartesian MRI k-space trajectories provide faster and more motion-robust data acquisitions than those of Cartesian trajectories. In this paper, we focus on the rosette trajectory and generalize the weighted rosette trajectories for fast undersampled k-space data acquisition. However, single-slice imaging using the rosette trajectory will be affected by the off-resonance effect. To reduce the artifacts from off-resonance slices, this paper introduced an adaptive iterative reconstruction method derived from the TV and nuclear norm regularization terms for raw MRI data reconstruction. This reconstruction problem was separated into two subproblems and solved with an adaptive regularization parameter. The results show that the weighted rosette trajectory that offers short acquisition times and good off-resonance behaviors with little blurring can be used for reconstruction with adaptive regularization parameters and achieve a superior performance.

Details

Language :
English
ISSN :
21693536
Volume :
9
Database :
OpenAIRE
Journal :
IEEE Access
Accession number :
edsair.doi.dedup.....1387b6f69976e61feaf684567dfb0418