27 February 2018 Factors affecting measurement of optic parameters by time-resolved near-infrared spectroscopy in breast cancer
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Abstract
The purpose of this study was to evaluate the effects of the thickness and depth of tumors on hemoglobin measurements in breast cancer by optical spectroscopy and to demonstrate tissue oxygen saturation (SO2) and reduced scattering coefficient (μs′) in breast tissue and breast cancer in relation to the skin-to-chest wall distance. We examined 53 tumors from 44 patients. Total hemoglobin concentration (tHb), SO2, and μs′ were measured by time-resolved spectroscopy (TRS). The skin-to-chest wall distance and the size and depth of tumors were measured by ultrasonography. There was a positive correlation between tHb and tumor thickness, and a negative correlation between tHb and tumor depth. SO2 in breast tissue decreased when the skin-to-chest wall distance decreased, and SO2 in tumors tended to be lower than in breast tissue. In breast tissue, there was a negative correlation between μs′ and the skin-to-chest wall distance, and μs′ in tumors was higher than in breast tissue. Measurement of tHb in breast cancer by TRS was influenced by tumor thickness and depth. Although SO2 seemed lower and μs′ was higher in breast cancer than in breast tissue, the skin-to-chest wall distance may have affected the measurements.
© 2018 Society of Photo-Optical Instrumentation Engineers (SPIE)
Nobuko Yoshizawa, Nobuko Yoshizawa, Yukio Ueda, Yukio Ueda, Tetsuya Mimura, Tetsuya Mimura, Etsuko Ohmae, Etsuko Ohmae, Kenji Yoshimoto, Kenji Yoshimoto, Hiroko Wada, Hiroko Wada, Hiroyuki Ogura, Hiroyuki Ogura, Harumi Sakahara, Harumi Sakahara, } "Factors affecting measurement of optic parameters by time-resolved near-infrared spectroscopy in breast cancer," Journal of Biomedical Optics 23(2), 026010 (27 February 2018). https://doi.org/10.1117/1.JBO.23.2.026010 . Submission: Received: 25 October 2017; Accepted: 2 February 2018
Received: 25 October 2017; Accepted: 2 February 2018; Published: 27 February 2018
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