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 Wu^1,3,4, and Yi Zhang^1,3,4

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

Synopsis

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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