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Evaluation of 3D fat-navigator based retrospective motion correction in the clinical setting of patients with brain tumors

Glessgen, Carl, Gallichan, Daniel, Moor, Manuela, Hainc, Nicola and Federau, Christian 2019. Evaluation of 3D fat-navigator based retrospective motion correction in the clinical setting of patients with brain tumors. Neuroradiology 61 (5) , pp. 557-563. 10.1007/s00234-019-02160-w
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Abstract

Purpose A 3D fat-navigator (3D FatNavs)-based retrospective motion correction is an elegant approach to correct for motion as it requires no additional hardware and can be acquired during existing ‘dead-time’ within common 3D protocols. The purpose of this study was to clinically evaluate 3D FatNavs in the work-up of brain tumors. Methods An MRI-based fat-excitation motion navigator incorporated into a standard MPRAGE sequence was acquired in 40 consecutive patients with (or with suspected) brain tumors, pre and post-Gadolinium injection. Each case was categorized into key anatomical landmarks, the temporal lobes, the infra-tentorial region, the basal ganglia, the bifurcations of the middle cerebral artery, and the A2 segment of the anterior cerebral artery. First, the severity of motion in the non-corrected MPRAGE was assessed for each landmark, using a 5-point score from 0 (no artifacts) to 4 (non-diagnostic). Second, the improvement in image quality in each pair and for each landmark was assessed blindly using a 4-point score from 0 (identical) to 3 (strong correction). Results The mean image improvement score throughout the datasets was 0.54. Uncorrected cases with light and no artifacts displayed scores of 0.50 and 0.13, respectively, while cases with moderate artifacts, severe artifacts, and non-diagnostic image quality revealed a mean score of 1.17, 2.25, and 1.38, respectively. Conclusion Fat-navigator-based retrospective motion correction significantly improved MPRAGE image quality in restless patients during MRI acquisition. There was no loss of image quality in patients with little or no motion, and improvements were consistent in patients who moved more.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Engineering
Cardiff University Brain Research Imaging Centre (CUBRIC)
Publisher: Springer Verlag
ISSN: 0028-3940
Date of First Compliant Deposit: 15 February 2019
Date of Acceptance: 3 January 2019
Last Modified: 02 Jul 2019 15:57
URI: http://orca.cf.ac.uk/id/eprint/119635

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