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Abstract #3819

Acceleration of Relaxation Time Mapping by Joint K-space and Image-space Parallel Imaging (KIPI)

Tao Zu1, Yi-Cheng Hsu2, Yi Sun2, Dan Wu1,3,4, and Yi Zhang1,3,4
1Key Laboratory for Biomedical Engineering of Ministry of Education, Department of Biomedical Engineering, College of Biomedical Engineering & Instrument Science, Zhejiang University, Hangzhou, China, 2MR Collaboration, Siemens Healthcare Ltd., Shanghai, China, 3Department of Neurology, The First Affiliated Hospital, Zhejiang University, Hangzhou, China, 4Cancer Center, Zhejiang University, Hangzhou, China


The relaxation time mapping has proven to be an important diagnostic tool, but it is limited by the prolonged scan time due to the measurements of multiple frames at the same location. In this study, the recently proposed auto-calibrated reconstruction method by joint k-space and image-space parallel imaging (KIPI) is utilized for the acceleration of relaxation time mapping. Combined with the ESPIRiT method, KIPI generates improved coil sensitivity maps and allows an acceleration factor of up to 4-fold for acquiring source images, yielding the accurate parameter map without obvious errors or artifacts.

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