Near-infrared time-resolved spectroscopy system for tissue oxygenation monitor

2000 ◽  
Author(s):  
Motoki Oda ◽  
Yutaka Yamashita ◽  
Tetsuhisa Nakano ◽  
Akihiro Suzuki ◽  
Keiji Shimizu ◽  
...  
Keyword(s):  
Near Infrared ◽  
Tissue Oxygenation ◽  
Time Resolved ◽  
Time Resolved Spectroscopy ◽  
Spectroscopy System

Near-infrared time-resolved spectroscopy system for tissue oxygenation monitor

1999 ◽  
Author(s):  
Motoki Oda ◽  
Yutaka Yamashita ◽  
Tetsuhisa Nakano ◽  
Akihiro Suzuki ◽  
Keiji Shimizu ◽  
...  
Keyword(s):  
Near Infrared ◽  
Tissue Oxygenation ◽  
Time Resolved ◽  
Time Resolved Spectroscopy ◽  
Spectroscopy System

scholarly journals A Versatile Setup for Time-Resolved Functional Near Infrared Spectroscopy Based on Fast-Gated Single-Photon Avalanche Diode and on Four-Wave Mixing Laser

2019 ◽  
Vol 9 (11) ◽  
pp. 2366 ◽  
Author(s):  
Laura Di Sieno ◽  
Alberto Dalla Mora ◽  
Alessandro Torricelli ◽  
Lorenzo Spinelli ◽  
Rebecca Re ◽  
...  
Keyword(s):  
Infrared Spectroscopy ◽  
Near Infrared Spectroscopy ◽  
Near Infrared ◽  
Single Photon ◽  
Wave Mixing ◽  
Functional Near Infrared Spectroscopy ◽  
Time Resolved ◽  
Diffusive Medium ◽  
Spectroscopy System

In this paper, a time-domain fast gated near-infrared spectroscopy system is presented. The system is composed of a fiber-based laser providing two pulsed sources and two fast gated detectors. The system is characterized on phantoms and was tested in vivo, showing how the gating approach can improve the contrast and contrast-to-noise-ratio for detection of absorption perturbation inside a diffusive medium, regardless of source-detector separation.

scholarly journals Brown adipose tissue density measured by near-infrared time-resolved spectroscopy in Japanese, across a wide age range

2018 ◽  
Vol 23 (06) ◽  
pp. 1 ◽  
Author(s):  
Sayuri Fuse ◽  
Shinsuke Nirengi ◽  
Shiho Amagasa ◽  
Toshiyuki Homma ◽  
Ryotaro Kime ◽  
...  
Keyword(s):  
Adipose Tissue ◽  
Brown Adipose Tissue ◽  
Near Infrared ◽  
Time Resolved ◽  
Time Resolved Spectroscopy ◽  
Tissue Density ◽  
Brown Adipose ◽  
Age Range

Optical Analysis of the Cirrhotic Liver by Near-Infrared Time-Resolved Spectroscopy

Surgery Today ◽  
2004 ◽  
Vol 34 (5) ◽  
pp. 424-428 ◽  
Author(s):  
Toshiyuki Kitai ◽  
Toshihiro Nishio ◽  
Mitsuharu Miwa ◽  
Yoshio Yamaoka
Keyword(s):  
Near Infrared ◽  
Cirrhotic Liver ◽  
Optical Analysis ◽  
Time Resolved ◽  
Time Resolved Spectroscopy

Human Brown Fat Assessed By Simple Noninvasive Near-infrared Time-resolved Spectroscopy

2014 ◽  
Vol 46 ◽  
pp. 626
Author(s):  
Shinsuke NIrengi ◽  
Takeshi Yoneshiro ◽  
Takeshi Saiki ◽  
Sayuri Aita ◽  
Mami Matsushita ◽  
...  
Keyword(s):  
Near Infrared ◽  
Brown Fat ◽  
Time Resolved ◽  
Time Resolved Spectroscopy

Time-resolved multi-channel optical system for assessment of brain oxygenation and perfusion by monitoring of diffuse reflectance and fluorescence

2014 ◽  
Vol 22 (1) ◽  
Author(s):  
D. Milej ◽  
A. Gerega ◽  
M. Kacprzak ◽  
P. Sawosz ◽  
W. Weigl ◽  
...  
Keyword(s):  
Near Infrared ◽  
Tissue Oxygenation ◽  
Brain Perfusion ◽  
Clinical Tool ◽  
Brain Tissue Oxygenation ◽  
Signal Processing Algorithm ◽  
Time Resolved ◽  
Fluorescence Measurements ◽  
Instrument Construction

AbstractTime-resolved near-infrared spectroscopy is an optical technique which can be applied in tissue oxygenation assessment. In the last decade this method is extensively tested as a potential clinical tool for noninvasive human brain function monitoring and imaging. In the present paper we show construction of an instrument which allows for: (i) estimation of changes in brain tissue oxygenation using two-wavelength spectroscopy approach and (ii) brain perfusion assessment with the use of single-wavelength reflectometry or fluorescence measurements combined with ICG-bolus tracking. A signal processing algorithm based on statistical moments of measured distributions of times of flight of photons is implemented. This data analysis method allows for separation of signals originating from extra- and intracerebral tissue compartments. In this paper we present compact and easily reconfigurable system which can be applied in different types of time-resolved experiments: two-wavelength measurements at 687 and 832 nm, single wavelength reflectance measurements at 760 nm (which is at maximum of ICG absorption spectrum) or fluorescence measurements with excitation at 760 nm. Details of the instrument construction and results of its technical tests are shown. Furthermore, results of in-vivo measurements obtained for various modes of operation of the system are presented.

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