title: fMRI headtracking using a single camera and a lightweight fiducial.
abstract: A single CCD/DSP camera based optical system affords six degree of freedom motion tracking for MRI applications with resolutions in the range of < 50 microradians and 10-100 microns. The fiducial target is a lightweight compact three dimensional pattern that allows efficient, centroid based algorithms to determine distance translation and angle rotation at rates of 30Hz. In-magnet tests measure the inherent magnet vibration as well as subject signatures such as those for respiration, speech, swallow and nod.
authors.affiliation: Electrical Engineering Department in the Erik Jonsson School of Engineering and Computer Science at The University of Texas at Dallas, Richardson, Texas 75225, USA. dlm@utdallas.edu
authors.forename: Duncan L
authors.initials: DL
authors.lastname: Macfarlane
authors.forename: Chester R
authors.initials: CR
authors.lastname: Wildey
mesh_terms: D000465:Algorithms; D057918:Fiducial Markers; D006257:Head; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods*; D009068:Movement; D010781:Photography / Q000295:instrumentation*