By a News Reporter-Staff News Editor at Health & Medicine Week -- Research findings on Health and Medicine are discussed in a new report. According to news reporting originating in Chicago, Illinois, by NewsRx journalists, research stated, "The spatial and temporal tracking performance of a commercially available 3D optical surface imaging system is evaluated for its potential use in frameless stereotactic radiosurgery head tracking applications. Both 3D surface and infrared (IR) marker tracking were performed simultaneously on a head phantom mounted on an xyz motion stage and on four human subjects."
The news reporters obtained a quote from the research from the University of Chicago, "To allow spatial and temporal comparison on human subjects, three points were simultaneously monitored, including the upper facial region (3D surface), a dental plate (IR markers), and upper forehead (IR markers). For both static and dynamic phantom studies, the 3D surface tracker was found to have a root mean squared error (RMSE) of approximately 0.30 mm for region-of-interest (ROI) surface sizes greater than 1000 vertex points. Although, the processing period (1/fps) of the 3D Surface system was found to linearly increase as a function of the number of ROI vertex points, the tracking accuracy was found to be independent of ROI size provided that the ROI was sufficiently large and contained features for registration. For human subjects, the RMSE between 3D surface tracking and IR marker tracking modalities was 0.22 mm left-right (x-axis), 0.44 mm superior-inferior (y-axis), 0.27 mm anterior-posterior (z-axis), 0.29 degrees pitch (around x-axis), 0.18 degrees roll (around y-axis), and 0.15 degrees yaw (around z-axis). 3D surface imaging has the potential to provide submillimeter level head motion tracking."
According to the news reporters, the research concluded: "This is provided that a highly accurate camera-to-LINAC frame of reference calibration can be performed and that the reference ROI is of sufficient size and contains suitable surface features for registration."
For more information on this research see: Spatial and temporal performance of 3D optical surface imaging for real-time head position tracking. Medical Physics, 2013;40(11):156-163. Medical Physics can be contacted at: Amer Assoc Physicists Medicine Amer Inst Physics, Ste 1 No 1, 2 Huntington Quadrangle, Melville, NY 11747-4502, USA. (American Association of Physicists in Medicine - www.aapm.org; Medical Physics - online.medphys.org/)
Our news correspondents report that additional information may be obtained by contacting R.D. Wiersma, University Chicago, Dept. of Radiat & Cellular Oncol, Chicago, IL 60637, United States. Additional authors for this research include S.L. Tomarken, Z. Grelewicz, A.H. Belcher and H. Kang (see also Health and Medicine).
Keywords for this news article include: Chicago, Illinois, United States, Health and Medicine, North and Central America
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