Dr. Xiaoxia Li Profile

Dr. Xiaoxia Li

at Tianjin Univ

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Publications (7)

Proceedings Article | 9 November 2010 Paper

Measurements of retinal temperature increase during photodynamic therapy for choroidal neovascularization

Hongxia Chen, Zaifu Yang, Ying Gu, Xiaoxia Li, Youquan Zhao, Luyong Zhang, Haixia Qiu

Proceedings Volume 7845, 78452Q (2010) https://doi.org/10.1117/12.870650

KEYWORDS: Temperature metrology, Photodynamic therapy, Retina, Tissues, Laser therapeutics, Laser damage threshold, Injuries, Eye models, Laser safety, Thermal effects

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Proceedings Article | 27 October 2006 Paper

A new near-infrared spectrometer developed for dynamic spectroscopy

Gang Li, Yu-liang Liu, Ling Lin, Xiao-xia Li, Yan Wang

Proceedings Volume 6047, 604720 (2006) https://doi.org/10.1117/12.710917

KEYWORDS: Spectroscopy, Blood, Arteries, Near infrared, Signal processing, Near infrared spectroscopy, Infrared spectroscopy, Tissues, Absorption, Process modeling

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Proceedings Article | 27 October 2006 Paper

Laser-induced heat source distribution in bio-tissues

Xiaoxia Li, Shifu Fan, Youquan Zhao

Proceedings Volume 6047, 604708 (2006) https://doi.org/10.1117/12.709808

KEYWORDS: Laser scattering, Scattering, Laser tissue interaction, Light scattering, Monte Carlo methods, Absorption, Laser therapeutics, Diffusion, Tissue optics, Signal attenuation

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Proceedings Article | 27 October 2006 Paper

Optical properties of the tissue effects upon the dynamic spectrum

Xiaoxia Li, Gang Li, Ling Lin, Yuliang Liu, Yan Wang, Xiumei Guo

Proceedings Volume 6047, 604704 (2006) https://doi.org/10.1117/12.709741

KEYWORDS: Scattering, Blood, Tissue optics, Transmittance, Monte Carlo methods, Diffuse reflectance spectroscopy, Tissues, Arteries, Absorption, Lithium

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Proceedings Article | 27 October 2006 Paper

Development of online NIR urine analyzing system based on AOTF

Feng Wan, Zhendong Sun, Xiaoxia Li

Proceedings Volume 6047, 60471W (2006) https://doi.org/10.1117/12.710906

KEYWORDS: Near infrared, Light, Collimation, Analytical research, Statistical analysis, Light sources, Mirrors, Spectrophotometry, Transducers, Sensors

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Proceedings Article | 10 June 2006 Paper

Bio-tissue temperature measuring for laser medicine

Xiaoxia Li, Shifu Fan, Youquan Zhao

Proceedings Volume 6344, 63441T (2006) https://doi.org/10.1117/12.693606

KEYWORDS: Temperature metrology, Laser tissue interaction, Infrared radiation, Laser therapeutics, Natural surfaces, Carbon dioxide lasers, Skin, Nd:YAG lasers, Thermal effects, In vivo imaging

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Temperature is an intuitionistic indicator of laser and tissue thermal interaction. It can be used as verification of theory prediction as well as online clinic indicator. Temperature measuring is an indispensable tool in laser and tissue photo-thermal theory research. A computer-assistant noninvasive or minimally invasive temperature measuring system, which can be used in laser medicine, was introduced. Combined infrared radiation thermometer and miniature thermocouple, the surface irradiating point and inner temperature can be monitored synchronously. This system has some necessary advantages for in vivo tissue temperature measuring. The infrared radiation thermometer temperature range is 0~200°C and 1mV/°C analog voltage output signal can be tntered to computer. Inside LED red light and aiming sound can assure the distance between thermometer and measuring point to be the focus distance of 25mm and measuring circle has the least diameter of 2.5mm. The mini K-thermocouples were made by ourselves, their temperature range is 25~500°C, the diameter of 0.4mm, and the response time is rapid up to 0.1s. They are convenient for precision orientation in the organisms. Multichannel temperature measuring can reduce the measurement error and be able for distribution measuring. Integrated temperature sensor LM35 and numerical computation is used to compensate the cold port temperature of the thermocouples. The numerical computation can also revise the nonlinearity error with the least squares method quintic polynomial fitting, which excels to the circuit method. Calibration results with glycerin and mercury thermometer showed the absolute error value is less than 0.45°C within 26-98°C. The real time temperatures of murine skin tissue irradiated by CO₂ and Nd:YAG laser were measured. Such a system is suitable to high precision, large range, minute point, rapid response and real time tissue temperature measuring in laser applications. The saved data can be used for later analysis and compared with the thermal transferring theory model and calculation.

Proceedings Article | 18 January 2005 Paper

Dynamic spectrum in frequency domain on nonnvasive in vivo measurement of blood spectrum

Xiaoxia Li, Gang Li, Ling Lin, Yuliang Liu, Yan Wang, Yunfeng Zhang

Proceedings Volume 5630, (2005) https://doi.org/10.1117/12.574198

KEYWORDS: Blood, Tissue optics, Scattering, Spectroscopy, Tissues, Near infrared, Glucose, Absorption, Light scattering, Near infrared spectroscopy

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