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Biomedical Optics Express

Biomedical Optics Express

  • Editor: Joseph A. Izatt
  • Vol. 3, Iss. 2 — Feb. 1, 2012
  • pp: 259–272

Noninvasive diffuse optical monitoring of head and neck tumor blood flow and oxygenation during radiation delivery

Lixin Dong, Mahesh Kudrimoti, Ran Cheng, Yu Shang, Ellis L. Johnson, Scott D. Stevens, Brent J. Shelton, and Guoqiang Yu  »View Author Affiliations

Biomedical Optics Express, Vol. 3, Issue 2, pp. 259-272 (2012)

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This study explored using a novel diffuse correlation spectroscopy (DCS) flow-oximeter to noninvasively monitor blood flow and oxygenation changes in head and neck tumors during radiation delivery. A fiber-optic probe connected to the DCS flow-oximeter was placed on the surface of the radiologically/clinically involved cervical lymph node. The DCS flow-oximeter in the treatment room was remotely operated by a computer in the control room. From the early measurements, abnormal signals were observed when the optical device was placed in close proximity to the radiation beams. Through phantom tests, the artifacts were shown to be caused by scattered x rays and consequentially avoided by moving the optical device away from the x-ray beams. Eleven patients with head and neck tumors were continually measured once a week over a treatment period of seven weeks, although there were some missing data due to the patient related events. Large inter-patient variations in tumor hemodynamic responses were observed during radiation delivery. A significant increase in tumor blood flow was observed at the first week of treatment, which may be a physiologic response to hypoxia created by radiation oxygen consumption. Only small and insignificant changes were found in tumor blood oxygenation, suggesting that oxygen utilizations in tumors during the short period of fractional radiation deliveries were either minimal or balanced by other effects such as blood flow regulation. Further investigations in a large patient population are needed to correlate the individual hemodynamic responses with the clinical outcomes for determining the prognostic value of optical measurements.

© 2012 OSA

OCIS Codes
(170.0170) Medical optics and biotechnology : Medical optics and biotechnology
(170.3660) Medical optics and biotechnology : Light propagation in tissues
(170.3880) Medical optics and biotechnology : Medical and biological imaging
(170.6480) Medical optics and biotechnology : Spectroscopy, speckle

ToC Category:
Optics in Cancer Research

Original Manuscript: October 28, 2011
Revised Manuscript: December 15, 2011
Manuscript Accepted: January 1, 2012
Published: January 4, 2012

Virtual Issues
January 20, 2012 Spotlight on Optics

Lixin Dong, Mahesh Kudrimoti, Ran Cheng, Yu Shang, Ellis L. Johnson, Scott D. Stevens, Brent J. Shelton, and Guoqiang Yu, "Noninvasive diffuse optical monitoring of head and neck tumor blood flow and oxygenation during radiation delivery," Biomed. Opt. Express 3, 259-272 (2012)

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