In vivo characterization of 3D skull and brain motion during dynamic head vibration using magnetic resonance elastography

Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine
Ziying YinJohn Huston

Abstract

To introduce newly developed MR elastography (MRE)-based dual-saturation imaging and dual-sensitivity motion encoding schemes to directly measure in vivo skull-brain motion, and to study the skull-brain coupling in volunteers with these approaches. Six volunteers were scanned with a high-performance compact 3T-MRI scanner. The skull-brain MRE images were obtained with a dual-saturation imaging where the skull and brain motion were acquired with fat- and water-suppression scans, respectively. A dual-sensitivity motion encoding scheme was applied to estimate the heavily wrapped phase in skull by the simultaneous acquisition of both low- and high-sensitivity phase during a single MRE exam. The low-sensitivity phase was used to guide unwrapping of the high-sensitivity phase. The amplitude and temporal phase delay of the rigid-body motion between the skull and brain was measured, and the skull-brain interface was visualized by slip interface imaging (SII). Both skull and brain motion can be successfully acquired and unwrapped. The skull-brain motion analysis demonstrated the motion transmission from the skull to the brain is attenuated in amplitude and delayed. However, this attenuation (%) and delay (rad) were considerably greater ...Continue Reading

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Citations

Feb 2, 2020·Journal of Biomechanical Engineering·Daniel R SmithCurtis L Johnson
Apr 20, 2019·Journal of Experimental Neuroscience·Ruth J OkamotoPhilip V Bayly
May 22, 2021·Journal of the Mechanical Behavior of Biomedical Materials·Nikolaus BenkoBrittany Coats
Jun 21, 2021·Seminars in Ultrasound, CT, and MR·Claudia F Kirsch, Mai-Lan Ho

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