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Rapid pre-saturated TFL transmit field mapping with an optimized 3D centric single-shot readout
{Robust and fast measurements of the transmit field strength is of great importance particularly in parallel transmit applications at ultra-high field. In this work, a pre-saturation TurboFLASH B1+ mapping sequence was optimized for 3-dimensional single-shot acquisition with spiral-centric reordering. Improved SNR and reduced artifacts were achieved by using a variable flip-angle readout. The ability of the proposed sampling scheme to perform fast whole-brain B1+ mapping with low SAR was demonstrated in phantom and in-vivo experiments at 9.4 T. The obtained B1+ maps were comparable to those obtained with the conventional 2D-SatTFL approach but required significantly less scan time.}
@misc{item_3248053, title = {{Rapid pre-saturated TFL transmit field mapping with an optimized 3D centric single-shot readout}}, booktitle = {{2020 ISMRM \& SMRT Virtual Conference \& Exhibition}}, abstract = {{Robust and fast measurements of the transmit field strength is of great importance particularly in parallel transmit applications at ultra-high field. In this work, a pre-saturation TurboFLASH B1+ mapping sequence was optimized for 3-dimensional single-shot acquisition with spiral-centric reordering. Improved SNR and reduced artifacts were achieved by using a variable flip-angle readout. The ability of the proposed sampling scheme to perform fast whole-brain B1+ mapping with low SAR was demonstrated in phantom and in-vivo experiments at 9.4 T. The obtained B1+ maps were comparable to those obtained with the conventional 2D-SatTFL approach but required significantly less scan time.}}, year = {2020}, slug = {item_3248053}, author = {Bosch, D and Bause, J and Ehses, P and Zaiss, M and Scheffler, K} }