Optically guided patient positioning techniques

Sanford L. Meeks, Wolfgang A. Tome, Tywla R. Willoughby, Patrick A. Kupelian, Thomas H. Wagner, John M. Buatti, Francis J. Bova

Research output: Contribution to journalArticle

65 Citations (Scopus)

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.

Original languageEnglish (US)
Pages (from-to)192-201
Number of pages10
JournalSeminars in Radiation Oncology
Volume15
Issue number3
DOIs
StatePublished - Jul 2005
Externally publishedYes

Fingerprint

Patient Positioning
positioning
markers
Radiotherapy
optical tracking
radiation therapy
Optical Devices
Mathematics
Anatomy
Tomography
X-Rays
Radiation
Light
anatomy
mathematics
rigid structures
linkages
Therapeutics
point sources
rooms

ASJC Scopus subject areas

  • Oncology
  • Radiology Nuclear Medicine and imaging
  • Radiological and Ultrasound Technology
  • Radiation

Cite this

Meeks, S. L., Tome, W. A., Willoughby, T. R., Kupelian, P. A., Wagner, T. H., Buatti, J. M., & Bova, F. J. (2005). Optically guided patient positioning techniques. Seminars in Radiation Oncology, 15(3), 192-201. https://doi.org/10.1016/j.semradonc.2005.01.004

Optically guided patient positioning techniques. / Meeks, Sanford L.; Tome, Wolfgang A.; Willoughby, Tywla R.; Kupelian, Patrick A.; Wagner, Thomas H.; Buatti, John M.; Bova, Francis J.

In: Seminars in Radiation Oncology, Vol. 15, No. 3, 07.2005, p. 192-201.

Research output: Contribution to journalArticle

Meeks, SL, Tome, WA, Willoughby, TR, Kupelian, PA, Wagner, TH, Buatti, JM & Bova, FJ 2005, 'Optically guided patient positioning techniques', Seminars in Radiation Oncology, vol. 15, no. 3, pp. 192-201. https://doi.org/10.1016/j.semradonc.2005.01.004
Meeks SL, Tome WA, Willoughby TR, Kupelian PA, Wagner TH, Buatti JM et al. Optically guided patient positioning techniques. Seminars in Radiation Oncology. 2005 Jul;15(3):192-201. https://doi.org/10.1016/j.semradonc.2005.01.004
Meeks, Sanford L. ; Tome, Wolfgang A. ; Willoughby, Tywla R. ; Kupelian, Patrick A. ; Wagner, Thomas H. ; Buatti, John M. ; Bova, Francis J. / Optically guided patient positioning techniques. In: Seminars in Radiation Oncology. 2005 ; Vol. 15, No. 3. pp. 192-201.
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