Multi-shot Diffusion EPI Reconstruction with Iterative Rigid Motion-correction and Motion-induced Phase-correction for Brain Imaging

Malte Steinhoff, Kay Nehrke, Alfred Mertins, Peter Börnert

Abstract

Multi-shot diffusion-weighted imaging offers increased SNR and higher resolution, but makes the acquisition vulnerable to shot-specific phase variations and macroscopic inter-shot motion. A wide range of iterative phase-corrected reconstruction schemes have been proposed to overcome the inter-shot phase inconsistencies, but robust motion estimation is still challenging due to the inherently low SNR of DWI. This work moves forward from initial one-time rigid motion estimation to an alternating optimization balancing the joint image, phase and motion estimation. A novel multi-shot echo-planar diffusion algorithm with iterative motion and phase correction is presented in simulations and in-vivo.
OriginalspracheEnglisch
PublikationsstatusVeröffentlicht - 2019
VeranstaltungAnnual Meeting of the International Society of Magnetic Resonance in Medicine 2019
- Palais des congrès de Montréal, Montréal, Kanada
Dauer: 11.05.201916.01.2021

Tagung, Konferenz, Kongress

Tagung, Konferenz, KongressAnnual Meeting of the International Society of Magnetic Resonance in Medicine 2019
KurztitelISMRM 2019
Land/GebietKanada
OrtMontréal
Zeitraum11.05.1916.01.21

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