Model-based Acceleration of Parameter mapping (MAP) for saturation prepared radially acquired data

Tran-Gia, Johannes, Staeb, Daniel, Wech, Tobias, Hahn, Dietbert and Koestler, Herbert (2013) Model-based Acceleration of Parameter mapping (MAP) for saturation prepared radially acquired data. Magnetic Resonance in Medicine, 70 6: 1524-1534. doi:10.1002/mrm.24600


Author Tran-Gia, Johannes
Staeb, Daniel
Wech, Tobias
Hahn, Dietbert
Koestler, Herbert
Title Model-based Acceleration of Parameter mapping (MAP) for saturation prepared radially acquired data
Journal name Magnetic Resonance in Medicine   Check publisher's open access policy
ISSN 0740-3194
1522-2594
Publication date 2013-12
Sub-type Article (original research)
DOI 10.1002/mrm.24600
Open Access Status
Volume 70
Issue 6
Start page 1524
End page 1534
Total pages 11
Place of publication Hoboken United States
Publisher John Wiley & Sons
Language eng
Subject 2741 Radiology Nuclear Medicine and imaging
Abstract A reconstruction technique called Model-based Acceleration of Parameter mapping (MAP) is presented allowing for quantification of longitudinal relaxation time and proton density from radial single-shot measurements after saturation recovery magnetization preparation. Using a mono-exponential model in image space, an iterative fitting algorithm is used to reconstruct one well resolved and consistent image for each of the projections acquired during the saturation recovery relaxation process. The functionality of the algorithm is examined in numerical simulations, phantom experiments, and in-vivo studies. MAP reconstructions of single-shot acquisitions feature the same image quality and resolution as fully sampled reference images in phantom and in-vivo studies. The longitudinal relaxation times obtained from the MAP reconstructions are in very good agreement with the reference values in numerical simulations as well as phantom and in-vivo measurements. Compared to available contrast manipulation techniques, no averaging of projections acquired at different time points of the relaxation process is required in MAP imaging. The proposed technique offers new ways of extracting quantitative information from single-shot measurements acquired after magnetization preparation. The reconstruction simultaneously yields images with high spatiotemporal resolution fully consistent with the acquired data as well as maps of the effective longitudinal relaxation parameter and the relative proton density. Magn Reson Med 70:1524-1534, 2013. © 2013 Wiley Periodicals, Inc. Copyright
Keyword K-space weighted image contrast
Model-based reconstruction
Parameter mapping
Radial acquisition
Saturation recovery magnetization preparation
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: Centre for Advanced Imaging Publications
 
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