Title :
Optical Sensor Position Indicator for Neonatal MEG
Author :
Urban, Erich ; Wakai, Ronald T.
Author_Institution :
Dept. of Med. Phys., Univ. of Wisconsin, Madison, WI, USA
Abstract :
We have developed an inexpensive PC camera-based system to measure sensor position and to track head motion during magnetoencephalography recordings. The system employs mirrors to triangulate the position of markers using a single camera. Sensor position measurement and head tracking can be performed without the need to manually digitize markers or fiducial points. The system is capable of measuring relative 3-D position within the required volume of interest with an accuracy of ~450 μm and can be constructed for approximately $150.
Keywords :
biomedical optical imaging; magnetoencephalography; medical image processing; neurophysiology; optical sensors; position measurement; stereo image processing; PC camera-based system; fiducial points; head motion; head tracking; magnetoencephalography; neonatal MEG; optical sensor position indicator; stereo imaging; Accuracy; Calibration; Cameras; Head; Magnetic heads; Mirrors; Position measurement; Biomedical optical imaging; magnetoencephalography (MEG); stereo image processing; Artifacts; Brain Mapping; Equipment Design; Equipment Failure Analysis; Head Movements; Humans; Imaging, Three-Dimensional; Magnetoencephalography; Optical Devices; Prenatal Diagnosis; Reproducibility of Results; Sensitivity and Specificity; Transducers;
Journal_Title :
Biomedical Engineering, IEEE Transactions on
DOI :
10.1109/TBME.2011.2171960
