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Abstract #3955

Joint optimisation of parallel transmission in 2D spin-echo based sequences

Belinda Ding1, Iulius Dragonu2, Patrick Liebig3, and Christopher T Rodgers1
1Wolfson Brain Imaging Centre, University of Cambridge, Cambridge, United Kingdom, 2Siemens Healthcare Limited, Firmley, United Kingdom, 3Siemens Healthineers, Erlangen, Germany

In this study, we assessed the performance of jointly optimised pTx excitation and refocusing pulses in 2D spin-echo based sequences on a 7T Terra scanner. In conventional pTx acquisitions, the excitation and refocusing pulses are designed independently based a set of fieldmaps. Here, we compared two approaches for jointly optimising the excitation and refocussing against an approach of separately optimised pTx pulses and the traditional circularly polarised pulses. We observed that pTx pulses significantly improve image quality in both phantom and in vivo acquisitions at 7T. The image quality is further improved with joint optimisation of excitation and refocusing pulses.

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