Journal of biomedical optics.
Publisher:
Published by SPIE--the International Society for Optical Engineering in cooperation with International Biomedical Optics Society,
Frequency: Monthly, 2011-
Country: United States
Language: English
Author(s):
Society of Photo-Optical Instrumentation Engineers., International Biomedical Optics Society.
Start Year:1996 -
ISSN:
1083-3668 (Print)
1560-2281 (Electronic)
1083-3668 (Linking)
1560-2281 (Electronic)
1083-3668 (Linking)
Impact Factor
3.5
2023
| NLM ID: | 9605853 |
| (DNLM): | SR0085918(s) |
| (OCoLC): | 32795913 |
| Coden: | JBOPFO |
| LCCN: | sn 95007415 |
| Classification: | W1 JO564TD |
Method to calibrate phase fluctuation in polarization-sensitive swept-source optical coherence tomography. We present a phase fluctuation calibration method for polarization-sensitive swept-source optical coherence tomography (PS-SS-OCT) using continuous polarization modulation. The method uses a low-voltage broadband polarization modulator driven by a synchronized sinusoidal burst waveform rather than an asynchronous waveform, together with the removal of the global phases of the measured Jones matrices by the use of matrix normalization. This makes it possible to average the measured Jones matrices to remove the artifact due to the speckle noise of the signal in the sample without introducing aux...
Infrared spectroscopy reveals both qualitative and quantitative differences in equine subchondral bone during maturation. The collagen phase in bone is known to undergo major changes during growth and maturation. The objective of this study is to clarify whether Fourier transform infrared (FTIR) microspectroscopy, coupled with cluster analysis, can detect quantitative and qualitative changes in the collagen matrix of subchondral bone in horses during maturation and growth. Equine subchondral bone samples (n = 29) from the proximal joint surface of the first phalanx are prepared from two sites subjected to different loading conditions. Three age groups are studied: newborn (0 days old), immature (5 to 11 months ol...
Kerr-gated time-resolved Raman spectroscopy of equine cortical bone tissue. Picosecond time-resolved Raman spectroscopy in equine cortical bone tissue is demonstrated. Using 400-nm pulsed laser excitation (1 ps at 1 kHz) it is shown that Kerr cell gating with a 4-ps window provides simultaneously time-resolved rejection of fluorescence and time-resolved Raman scatter enabling depth profiling through tissue. The Raman shifts are the same as those observed by conventional cw Raman spectroscopy using deep-red or near-infrared lasers. The time decay of Raman photons is shown to fit an inverse square root of time function, suggesting propagation by a diffusive mechanism. U...
Articular Cartilage Optical Properties in the Spectral Range 300-850 nm. Measurements of absolute total reflectance were recorded from weight-bearing (n=9) and nonweight-bearing (n=9) equine articular cartilage specimens from 300 to 850 nm using a spectrophotometer with integrating sphere attachment. Following correction of measured spectra for interfacial reflections and edge losses, Kubelka-Munk theory was applied to estimate absorption and scattering coefficient, one-dimensional light intensity distribution, and light penetration depth. Kubelka-Munk absorption coefficients ranged from ∼7 cm-1 at 330 nm to ∼1 cm-1 at 850 nm. A localized absorption peak wa...