, Volume 29, Issue 4, pp 589-594

Design and efficacy of a head-coil bite bar for reducing movement-related artifacts during functional MRI scanning

Abstract

This article describes the design, construction, application, and effectiveness of a simple bite bar for use with an MRI whole-head coil to reduce head-movement-related artifacts during functional brain imaging. The device is comfortable to use and allows considerable flexibility in positioning the subject’s head. Eleven subjects were scanned while performing a motor-sequencing experiment with and without the bite bar. The bite bar was generally effective in reducing maximum head movement to less than 0.5 mm (translation) and 0.5° (rotation).

This research was supported in part by The Sinclair Fund, NIH (MH30854, F32BS09628, AA05965, and AG11427), and the Department of Veterans Affairs. The authors thank Gary Glover for fMRI data acquisition software, Margaret Rosenbloom for editorial assistance, Kurt Campbell and Kris Morrow for help with Figure 1, Douglas Schwandt for help with Figures 2 and 3, and Chuck Revell for help with Figure 4.