Noninvasive diffuse optical measurement of blood flow and blood oxygenation for monitoring radiation therapy in patients with head and neck tumors: A pilot study

Ulas Sunar, Harry Quon, Turgut Durduran, Jun Zhang, Juan Du, Chao Zhou, Guoqiang Yu, Regine Choe, Alex Kilger, Robert Lustig, Laurie Loevner, Shoko Nioka, Britton Chance, Arjun G. Yodh

Research output: Contribution to journalArticlepeer-review

Abstract

This pilot study explores the potential of noninvasive diffuse correlation spectroscopy (DCS) and diffuse reflectance spectroscopy (DRS) for monitoring early relative blood flow (rBF), tissue oxygen saturation (StO2), and total hemoglobin concentration (THC) responses to chemo-radiation therapy in patients with head and neck tumors. rBF, St O2, and THC in superficial neck tumor nodes of eight patients are measured before and during the chemo-radiation therapy period. The weekly rBF, StO2, and THC kinetics exhibit different patterns for different individuals, including significant early blood flow changes during the first two weeks. Averaged blood flow increases (52.7±9.7)% in the first week and decreases (42.4±7.0)% in the second week. Averaged StO2 increases from (62.9±3.4)% baseline value to (70.4±3.2)% at the end of the second week, and averaged THC exhibits a continuous decrease from pretreatment value of (80.7±7.0) [μM] to (73.3 ±8.3) [μM] at the end of the second week and to (63.0±8.1) [μM] at the end of the fourth week of therapy. These preliminary results suggest daily diffuse-optics-based therapy monitoring is feasible during the first two weeks and may have clinical promise.

Original languageEnglish (US)
Article number064021
JournalJournal of biomedical optics
Volume11
Issue number6
DOIs
StatePublished - Nov 2006

Keywords

  • Blood flow
  • Diffuse optics
  • Head and neck tumors
  • Therapy monitoring
  • Tissue oxygenation

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Atomic and Molecular Physics, and Optics
  • Biomedical Engineering

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