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Abstract #2272

Half-Radial Balanced Steady-State Free Precession for Functional Lung Imaging with Matrix Pencil Decomposition at 3T

Andrea Leuthard1,2, Grzegorz Bauman1,2, and Oliver Bieri1,2
1Department of Biomedical Engineering, University of Basel, Allschwil, Switzerland, 2Department of Radiology, Division of Radiological Physics, University Hospital Basel, Basel, Switzerland

Synopsis

Keywords: Lung, Lung, bSSFP, half-radial, function

Motivation: At 3T, functional lung imaging with balanced steady-state free precession (bSSFP) is prone to off-resonance artifacts.

Goal(s): Mitigation of bSSFP off-resonance artifacts at 3T by minimizing its TR beyond current limits.

Approach: We designed a half-radial bSSFP technique for functional lung imaging with matrix pencil decomposition. This allows to further substantially reduce the TR as compared to conventional Cartesian bSSFP with asymmetric echo readout.

Results: Half-radial bSSFP showed higher contrast-to-noise ratios for ventilation and perfusion images as compared to Cartesian bSSFP. Especially in peripheral lung regions, improved contrast and reduced banding artifacts were observed.

Impact: This work demonstrates that functional lung matrix pencil decomposition MRI using half-radial bSSFP is feasible at 3T. The adapted acquisition scheme helps to supress off-resonance artifacts and can be used as an alternative to the contemporary Cartesian k-space sampling approach.

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