Jul 25, 2020 · An important tool for this purpose is B0 simulation of multi-coil shim performance based on in vivo field maps. Using simulations, we are now exploring "hybrid" approaches in …

We introduce fast B1 calibration tools utilizing some linear algebra formalism with transmit coil arrays, ranging from simple (relative B1 phase) to more demanding measures (absolute B1 …

Aug 14, 2024 · The integration of RF and shim coils brings a high shim efficiency due to the proximity of participants. This technique will potentially be applied to high-density RF coils with …

Sep 6, 2006 · RF shimming should be more effective at lower frequencies, with more elements, or over a smaller ROI. Here we investigate some of the limitations of RF shimming by going to …

CONCLUSION: Integrated RF/shim arrays provide a more efficient alternative to spherical harmonic shimming and independent MC shim arrays. Applications to be explored include …

RF shimming is a simplified form of pTx, where the complex weights of different transmit channels are optimized to improve image quality.

Oct 17, 2023 · Purpose: To develop a flexible, lightweight, and multi-purpose integrated parallel reception, excitation, and shimming (iPRES) coil array that can conform to the subject's …

Mar 23, 2018 · RF Shim Prediction by Iteratively Projected Ridge Regression (PIPRR) predicts patient-specific, SAR-efficient RF shims with a machine learning approach that merges …

To achieve comparable power requirements for all transmit (TX) channels, this study investigates “double-regularized” RF shimming, minimizing the mean as well as the maximum RF power. …

The purpose of this work was to develop a novel integrated radiofrequency and shim (RF/shim) coil array that can perform parallel reception and localized B0 shimming in the human brain …