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Abstract #2574

Dynamic Slice-Dependent Shim and Center Frequency Update in 3 T Breast DWI

Seung-Kyun Lee1, Ek T. Tan1, Ambey Govenkar2, Ileana Hancu1

1GE Global Research, Niskayuna, NY, United States; 2Extenprise, Pune, India

Dynamic slice-dependent update of linear shim gradients and center frequency was implemented in 3 T breast imaging. The method was applied to axial bilateral breast DWI on four volunteers. In all volunteers the measured B0 maps showed significantly improved homogeneity. Anatomy-referenced ADC maps also showed reduced image registration error obtainable with the proposed method.

Keywords

acceleration accuracy achievable added anatomical anatomy applied array arrows artifacts assessment asymmetry audience axial benefit bilateral body breast breasts breath cancer causes channel chosen clinical clinicians coil coils color compensated compensates component components confidence consistently conventionally dedicated demonstrating dependent depending detection determined deviation diagnostic diffusion dual dynamic dynamically effectively enhance example expected frequency future global gradient gradients grant greater head hold homogeneity implementation implemented implementing improve improvement improvements induced inferior inhomogeneity larger linear local locations manner many mapping maps measured minutes misalignment modification modified near nearby organs overlaid past pixel placed placement planar potentially prescriptions previously pronounced proposed protocol quality quantitative reduction registration remains represents researchers resolution saved scale scanned scanner schematic shape shim shimmed shimming slice slices strategic subject subjects subsequent subsequently suggest summary superior supported susceptibility table taken target tended type typically update variation vary verify volumetric volunteer volunteers water