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 Niendorf^1,3, 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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