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Abstract #3394

Comparison of three B1 correction methods for RARE imaging with transceive surface RF coils

Paula Ramos Delgado1, Andre Kuehne2, Jason M. Millward1, Joao Periquito1, Thoralf Niendorf1,3, Sonia Waiczies1, and Andreas Pohlmann1
1Berlin Ultrahigh Field Facility (B.U.F.F), Max Delbrück Center for Molecular Medicine in the Helmholtz Association, Berlin, Germany, 2MRI.tools GmbH, Berlin, Germany, 3Experimental and Clinical Research Center, a joint cooperation between the Charité Medical Faculty and the Max Delbrück Center for Molecular Medicine in the Helmholtz Association, Berlin, Germany

Fluorine MR methods support quantification but have inherently low SNR. To enhance sensitivity, SNR-efficient imaging techniques such as RARE and cryogenically-cooled surface RF coils are used. However, transceive surface RF coils show variation in the excitation field, impairing quantification and T1 contrast. We previously showed improved homogeneity using a novel B1 correction method developed for 1H imaging that uses experimental data acquired with a volume resonator. Here, we compared it to a sensitivity-only correction and a combination of both, to evaluate which approach yields the most accurate contrast and concentration quantification. This work is applicable to different nuclei.

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