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Articles by Mark Chiew
Clean Self-Supervised MRI Reconstruction from Noisy, Sub-Sampled Training Data with Robust SSDU
1. Introduction Magnetic resonance imaging (MRI) has excellent soft tissue contrast and is the gold standard modality for a number of clinical applications. A hindrance of MRI, however, is its lengthy acquisition time, which is especially challenging when high spatio-temporal resolution is required, such as for dynamic imaging [ 1 ].
Speaking to a metronome reduces kinematic variability in typical speakers and people who stutter
Citation: Wiltshire CEE, Cler GJ, Chiew M, Freudenberger J, Chesters J, Healy MP, et al. (2024) Speaking to a metronome reduces kinematic variability in typical speakers and people who stutter. PLoS ONE 19(10): e0309612. https://doi.org/10.1371/journal.pone.0309612 Editor: Geoffrey A. Coalson, The University of Texas at Austin, UNITED STATES OF AMERICA Received: June 8, 2023; Accepted: August 14, 2024; Published: October 16, 2024 Copyright: © 2024 Wiltshire et al.
Motion correction with subspace-based self-navigation for combined angiography, perfusion and structural imaging
Abstract Motion artifacts are problematic in many MRI modalities. Self-navigating approaches are desirable, since no additional scan time or hardware is required. However, the generation of a navigator image, to estimate and correct motion, is difficult in cases where the tissue contrast is changing during the navigator acquisition window, such as in magnetization-prepared methods.
Ultra-high temporal resolution 4D angiography using arterial spin labeling with subspace reconstruction
Abstract Purpose: To achieve ultra-high temporal resolution non-contrast 4D angiography with improved spatiotemporal fidelity. Methods: Continuous data acquisition using 3D golden-angle sampling following an arterial spin labeling preparation allows for flexibly reconstructing 4D dynamic angiograms at arbitrary temporal resolutions. However, k-space data is often temporally "binned" before image reconstruction, negatively affecting spatiotemporal fidelity and limiting temporal resolution.
Test-Retest Reproducibility of Reduced-Field-of-View Density-Weighted CRT MRSI at 3T
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Test-Retest Reproducibility of Reduced Field of View Density-Weighted CRT MRSI at 3T
Preprint Article Version 1 This version is not peer-reviewed Version 1 : Received: 20 February 2024 / Approved: 21 February 2024 / Online: 21 February 2024 (14:59:03 CET) Farley, N.; Susjnar, A.; Chiew, M.; Emir, U.E. Test-Retest Reproducibility of Reduced Field of View Density-Weighted CRT MRSI at 3T. Preprints 2024, 2024021211.
DORSAL RAPHE NUCLEUS CONTROLS MOTIVATIONAL STATE TRANSITIONS IN MONKEYS
Abstract The dorsal raphe nucleus (DRN) is an important source of serotonin in the brain but fundamental aspects of its function remain elusive. Here, we present a combination of minimally invasive recording and disruption studies to show that DRN brings about changes in motivation states. We use recently developed methods for identifying temporal patterns in behaviour to show that monkeys change their motivation depending on the availability of rewards in the environment.
Multi-site Ultrashort Echo Time 3D Phosphorous MRSI repeatability using novel Rosette Trajectory (PETALUTE)
Abstract Purpose: This study aims 1) to implement an operator-independent acquisition, reconstruction, and processing pipeline using a novel rosette k-space pattern for UTE 31P 3D MRSI and 2) to evaluate the clinical applicability and replicability at different experimental setups. Methods: A multicenter repeatability study was conducted for the novel UTE 31P 3D Rosette MRSI at three institutions with different experimental setups.
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