On shimming approaches in 3T breast MRI.

Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine
Ileana HancuSeung-Kyun Lee

Abstract

A comparative study is presented, analyzing quantitatively the impact of 15 shim strategies on the homogeneity of the main magnetic field over the three-dimensional breast region in 3T MRI. The results obtained in 12 female volunteers, spanning a wide range of body and breast types, indicate that the inclusion of the back and heart in the shim region of interest leads to considerable decrease in field homogeneity, and needs to be avoided. Comparison between shim strategies using volumetric B(0) maps, covering the entire breast region, and 1-6 plane B(0) maps indicate only minimally reduced performance for the latter. Interestingly, however, no single shim strategy relying on a limited number of B(0) maps as input was found to work best in all volunteers. This was attributed to the limited capability of a small number of B(0) maps to capture the B(0) variability existent within breast. On the average, a rectangular shim region of interest, encompassing the breast region alone, worked best for the cohort studied here.

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Citations

Dec 29, 2015·Magnetic Resonance Imaging·Tijl A van der VeldenDennis W J Klomp
Mar 13, 2014·NMR in Biomedicine·Vincent O BoerDennis W J Klomp
Jun 27, 2013·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Seung-Kyun LeeIleana Hancu
Mar 19, 2013·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Chad T HarrisBlaine A Chronik
Jul 22, 2014·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Eddy SolomonLucio Frydman
Jul 13, 2016·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Ileana HancuEk T Tan
Mar 1, 2017·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Tijl A van der VeldenDennis W J Klomp
Apr 6, 2013·NMR in Biomedicine·Dennis W J KlompSeth A Smith
Jul 3, 2020·Journal of Magnetic Resonance Imaging : JMRI·Ek T TanDavid C Newitt
May 29, 2019·NMR in Biomedicine·Erwin KrikkenJannie P Wijnen
Mar 9, 2019·Journal of Magnetic Resonance Imaging : JMRI·Reza FardaneshSunitha B Thakur

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