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- Title
Two-dimensional accelerated MP-RAGE imaging with flexible linear reordering.
- Authors
Brenner, Daniel; Stirnberg, Rüdiger; Pracht, Eberhard; Stöcker, Tony
- Abstract
Object: Implementation of an accelerated Magnetization Prepared RApid Gradient Echo (MP-RAGE) sequence for T1 weighted neuroimaging; exploiting modern MRI technologies to minimize scan time while preserving the image quality. Materials and methods: A custom MP-RAGE sequence was implemented on a state-of-the-art 3T MR scanner equipped with a 32-channel receiver array head coil. The sequence utilized a shifted CAIPIRINHA k- k under-sampling pattern combined with elliptical scanning and a two-dimensional view ordering scheme to achieve high parallel imaging acceleration factors at maintained image contrast. Results: It could be shown that MP-RAGE accelerated in two k-space directions outperforms single direction acceleration, which is the common practice with standard view ordering. Applying the CAIPIRINHA technique in conjunction with elliptical scanning further increased this benefit. Conclusion: By combining MP-RAGE with CAIPIRINHA sampling and elliptical scanning, the scan time can be reduced from 4-5 min to 2-3 min with insignificant reduction in image quality.
- Subjects
IMAGE quality in imaging systems; BRAIN imaging; MAGNETIC resonance imaging; K-spaces; TWO-dimensional models; SCANNING systems; EQUIPMENT &; supplies
- Publication
MAGMA: Magnetic Resonance Materials in Physics, Biology & Medicine, 2014, Vol 27, Issue 5, p455
- ISSN
0968-5243
- Publication type
Article
- DOI
10.1007/s10334-014-0430-y