Journal article
Optically Guided Patient Positioning Techniques
Seminars in radiation oncology, Vol.15(3), pp.192-201
2005
DOI: 10.1016/j.semradonc.2005.01.004
PMID: 15983944
Abstract
Optical tracking determines an object’s position by measuring light either emitted or reflected from the object. The hallmark of optical tracking systems is their high spatial resolution and measurement in real time; such systems can resolve the position of a point source within a fraction of a millimeter and report at a rate of 10 Hz or faster. Several systems have been developed for radiation therapy, all of which track infrared markers attached to the patient’s external surface. The positions of the optical markers relative to the target volume, together with the desired marker positions relative to treatment isocenter, are determined during computed tomography simulation. In the treatment room, the real marker positions are measured relative to isocenter; rigid-body mathematics then determine marker displacements from their desired positions and hence target displacement from isocenter. Real-time feedback allows one to correct the patient’s position. The first systems were used for intracranial stereotaxis radiotherapy; rigid arrays of optical markers were attached to the patient via a biteplate linkage. Subsequent systems for extracranial radiotherapy tracked external markers to determine patient position and/or gate the radiation beam based on patient motion. Lastly, optical tracking has been integrated with ultrasound or stereoscopic x-ray imaging to determine the position of internal anatomy targets relative to isocenter.
Details
- Title: Subtitle
- Optically Guided Patient Positioning Techniques
- Creators
- Sanford L Meeks - Department of Radiation Oncology, M.D. Anderson Cancer Center Orlando, Orlando, FLWolfgang A Tomé - Department of Human Oncology, University of Wisconsin Medical School, Madison, WITywla R Willoughby - Department of Radiation Oncology, M.D. Anderson Cancer Center Orlando, Orlando, FLPatrick A Kupelian - Department of Radiation Oncology, M.D. Anderson Cancer Center Orlando, Orlando, FLThomas H Wagner - Department of Radiation Oncology, M.D. Anderson Cancer Center Orlando, Orlando, FLJohn M Buatti - Department of Radiation Oncology, University of Iowa, Iowa City, IAFrancis J Bova - Department of Neurosurgery, University of Florida, Gainesville, FL
- Resource Type
- Journal article
- Publication Details
- Seminars in radiation oncology, Vol.15(3), pp.192-201
- Publisher
- Elsevier Inc
- DOI
- 10.1016/j.semradonc.2005.01.004
- PMID
- 15983944
- ISSN
- 1053-4296
- eISSN
- 1532-9461
- Language
- English
- Date published
- 2005
- Academic Unit
- Radiation Oncology; Neurosurgery; Otolaryngology
- Record Identifier
- 9984040469702771
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