High-resolution diffusion-weighted imaging of the breast with multiband 2D radiofrequency pulses and a generalized parallel imaging reconstruction.

Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine
Valentina TavianiBrian A Hargreaves

Abstract

To develop a technique for high-resolution diffusion-weighted imaging (DWI) and to compare it with standard DWI methods. Multiple in-plane bands of magnetization were simultaneously excited by identically phase modulating each subpulse of a two-dimensional (2D) RF pulse. Several excitations with the same multiband pattern progressively shifted in the phase-encode direction were used to cover the prescribed field of view (FOV). The phase-encoded FOV was limited to the width of a single band to reduce off-resonance-induced distortion and blurring. Parallel imaging (PI) techniques were used to resolve aliasing from the other bands and to combine the different excitations. Following validation in phantoms and healthy volunteers, a preliminary study in breast cancer patients (N=14) was performed to compare the proposed method to conventional DWI with PI and to reduced-FOV DWI. The proposed method gave high-resolution diffusion-weighted images with minimal artifacts at the band intersections. Compared to PI alone, higher phase-encoded FOV-reduction factors and reduced noise amplification were obtained, which translated to higher resolution images than conventional (non-multiband) DWI. The same resolution and image quality achievable ...Continue Reading

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Citations

Sep 17, 2016·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Ronald MooiweerHans Hoogduin
Oct 9, 2019·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Yuxin HuBrian Hargreaves
Feb 23, 2020·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Eddy SolomonLucio Frydman
Jun 2, 2020·Frontiers in Medicine·Apekshya ChhetriJoseph V Rispoli
Dec 12, 2018·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Maya DelbanyFreddy Odille
May 8, 2018·Journal of Magnetic Resonance Imaging : JMRI·Sibel KulOguzhan Ozdemir
Aug 6, 2021·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Kaibao SunXiaohong Joe Zhou

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