Simultaneous multi-slice imaging reduces sensitivity of local-SAR to patient motion at 7T

Kopanoglu, Emre ORCID: https://orcid.org/0000-0001-8982-4441, Deniz, Cem M. and Wise, Richard G. ORCID: https://orcid.org/0000-0003-1700-2144 2020. Simultaneous multi-slice imaging reduces sensitivity of local-SAR to patient motion at 7T. Presented at: ISMRM 28th Annual Meeting & Exhibition, Sydney Australia, 08-14 August 2020. Proceedings of the ISMRM 28th annual meeting and exhibition. (3691)

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Abstract

This study investigates the effect of within-scan patient motion on local-SAR for simultaneous multi-slice (SMS) imaging at 7T. A virtual body model was simulated at 104 different positions. 1-/2-/3-spokes pulses were designed to excite a region of 60 slices covering the cerebellum and the brain, using SMS-factors of 1 through 5. Local-SAR was observed to increase by up to 2.75-fold due to patient motion. Pulses with higher SMS-factors were up to 50% less sensitive against changes in local-SAR due to patient motion, compared to SMS:1 pulses. Pulses with higher SMS-factors yielded more consistent local-SAR throughout the scan.

Item Type:	Conference or Workshop Item (Other)
Date Type:	Publication
Status:	Published
Schools:	Psychology Cardiff University Brain Research Imaging Centre (CUBRIC)
Date of First Compliant Deposit:	24 February 2021
Last Modified:	10 Nov 2022 10:35
URI:	https://orca.cardiff.ac.uk/id/eprint/147400

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