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Abstract #4555

Reconstruction Efficiency and Accuracy Improvement in Real Time Dynamic Parallel Imaging Through Explicit Tracking of Calibration Information

Roger Nana1, Xiaoping Hu1

1Biomedical Engineering, Emory University / Georgia Institute of Technology, Atlanta, GA, USA

This paper presents an approach for improving image reconstruction in dynamic parallel imaging in cases with cyclic changes in coil calibration information. The variation of the calibration information is ascertained by a consistency measure, and the cyclic nature of the variation is used to improve the reconstruction efficiency and accuracy by allowing time frames to share calibration information and avoid using inconsistent calibrating frames. The method is demonstrated using TGRAPPA with free-breathing cardiac imaging data. The method is simple and robust and can be applied to other real-time parallel dynamic image reconstructions