Quantitative in-vivo measurements of blood oxygen saturation using multiwavelength photoacoustic imaging

2007 ◽  
Author(s):  
J. Laufer ◽  
E. Zhang ◽  
P. Beard
Keyword(s):  
Oxygen Saturation ◽  
Photoacoustic Imaging ◽  
Blood Oxygen ◽  
Blood Oxygen Saturation ◽  
In Vivo Measurements

scholarly journals Optical Measurement of Blood Oxygen Saturation of Dental Pulp

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Satoko Kakino ◽  
Shinya Kushibiki ◽  
Azusa Yamada ◽  
Zenzo Miwa ◽  
Yuzo Takagi ◽  
...  
Keyword(s):  
Light Intensity ◽  
Oxygen Saturation ◽  
Dental Pulp ◽  
Optical Measurement ◽  
Blood Oxygen ◽  
Arterial Pulse ◽  
Blood Oxygen Saturation ◽  
Visible Wavelengths

The applicability of arterial pulse oximetry to dental pulp was demonstrated using in vitro and in vivo measurements. First, porcine blood of known oxygen saturation (SO2) was circulated through extracted human upper incisors, while transmitted-light plethysmography was performed using three different visible wavelengths. From the light intensity waveforms measured in vitro, a parameter that is statistically correlated to SO2 was calculated using the pulsatile/nonpulsatile component ratios of two wavelengths for different SO2. Then, values were measured in vivo for living incisors, and the corresponding SO2 values were calculated using the results of in vitro measurements. The estimated SO2 values of the upper central incisors measured in vivo were from 71.0 to 92.7%. This study showed the potential to measure the oxygen saturation changes to identify the sign of pulpal inflammation.

In vivo MRI measurement of fetal blood oxygen saturation in cardiac ventricles of fetal sheep: A feasibility study

2010 ◽  
Vol 64 (1) ◽  
pp. 32-41 ◽  
Author(s):  
Ulrike Wedegärtner ◽  
Hendrik Kooijman ◽  
Jin Yamamura ◽  
Michael Frisch ◽  
Christoph Weber ◽  
...  
Keyword(s):  
Oxygen Saturation ◽  
Feasibility Study ◽  
Blood Oxygen ◽  
Fetal Blood ◽  
Blood Oxygen Saturation ◽  
Fetal Sheep ◽  
Cardiac Ventricles
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