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Rosette Trajectories for Fast MRI Based on an Adaptive Reconstruction Method
- 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.
- Subjects :
- reconstruction
General Computer Science
Computer science
weighted rosette
02 engineering and technology
Iterative reconstruction
adaptively
030218 nuclear medicine & medical imaging
law.invention
03 medical and health sciences
0302 clinical medicine
Data acquisition
law
0202 electrical engineering, electronic engineering, information engineering
General Materials Science
Cartesian coordinate system
Fast mri
Rosette (schizont appearance)
k-space
General Engineering
Reconstruction method
Trajectory
020201 artificial intelligence & image processing
lcsh:Electrical engineering. Electronics. Nuclear engineering
non-Cartesian trajectory
Focus (optics)
Algorithm
lcsh:TK1-9971
MRI
Subjects
Details
- Language :
- English
- ISSN :
- 21693536
- Volume :
- 9
- Database :
- OpenAIRE
- Journal :
- IEEE Access
- Accession number :
- edsair.doi.dedup.....1387b6f69976e61feaf684567dfb0418