Are Movement Artifacts in Magnetic Resonance Imaging a Real Problem? A Narrative Review

TY - JOUR

T1 - Are Movement Artifacts in Magnetic Resonance Imaging a Real Problem?

T2 - A Narrative Review

AU - Havsteen, Inger

AU - Ohlhues, Anders

AU - Madsen, Kristoffer H

AU - Nybing, Janus Damm

AU - Christensen, Hanne

AU - Christensen, Anders

PY - 2017/5/30

Y1 - 2017/5/30

N2 - Movement artifacts compromise image quality and may interfere with interpretation, especially in magnetic resonance imaging (MRI) applications with low signal-to-noise ratio such as functional MRI or diffusion tensor imaging, and when imaging small lesions. High image resolution has high sensitivity to motion artifacts and often prolongs scan time that again aggravates movement artifacts. During the scan fast imaging techniques and sequences, optimal receiver coils, careful patient positioning, and instruction may minimize movement artifacts. Physiological noise sources are motion from respiration, flow and pulse coupled to cardiac cycles, from the swallowing reflex and small spontaneous head movements. Par example, in resting-state functional MRI spontaneous neuronal activity adds 1-2% of signal change, even under optimal conditions signal contributions from physiological noise remain a considerable fraction hereof. Movement tracking during imaging may allow for prospective correction or postprocessing steps separating signal and noise.

AB - Movement artifacts compromise image quality and may interfere with interpretation, especially in magnetic resonance imaging (MRI) applications with low signal-to-noise ratio such as functional MRI or diffusion tensor imaging, and when imaging small lesions. High image resolution has high sensitivity to motion artifacts and often prolongs scan time that again aggravates movement artifacts. During the scan fast imaging techniques and sequences, optimal receiver coils, careful patient positioning, and instruction may minimize movement artifacts. Physiological noise sources are motion from respiration, flow and pulse coupled to cardiac cycles, from the swallowing reflex and small spontaneous head movements. Par example, in resting-state functional MRI spontaneous neuronal activity adds 1-2% of signal change, even under optimal conditions signal contributions from physiological noise remain a considerable fraction hereof. Movement tracking during imaging may allow for prospective correction or postprocessing steps separating signal and noise.

U2 - 10.3389/fneur.2017.00232

DO - 10.3389/fneur.2017.00232

M3 - Review

C2 - 28611728

SN - 1664-2295

VL - 8

JO - Frontiers in Neurology

JF - Frontiers in Neurology

M1 - 232

ER -