Diffuse Reflectance Spectroscopy
Diffuse Reflectance Spectroscopy - Related Videos
06:50
Diffuse Reflectance Spectroscopy: Getting the Capillary Refill Test Under One's Thumb
0 Views •
Cited by 4 •
2017
This protocol describes how the use of diffuse polarization spectroscopy can improve the clinical usefulness of the capillary refill test. We suggest a more detailed analysis of the course of the capillary refill in healthy volunteers using diffuse reflectance spectroscopy videos and new informatic endpoints.
09:25
Agarose-based Tissue Mimicking Optical Phantoms for Diffuse Reflectance Spectroscopy
0 Views •
Cited by 32 •
2018
Here, we demonstrate how agarose-based tissue-mimicking optical phantoms are made and how their optical properties are determined using a conventional optical system with an integrating sphere.
10:31
Diffuse Reflectance Infrared Spectroscopic Identification of Dispersant/Particle Bonding Mechanisms in Functional Inks
0 Views •
Cited by 11 •
2015
Formulation of stable, functional inks is critical to expanding the applications of additive manufacturing. In turn, knowledge of the mechanisms of dispersant/particle bonding is required for effective ink formulation. Diffuse Reflectance Fourier Transform Infrared Spectroscopy (DRIFTS) is presented as a simple, inexpensive way to gain insight into these mechanisms.
02:16
Multispectral Diffuse Reflectance Imaging of Rat Cerebral Blood Flow and Tissue Structure
0 Views •
2025
Source: Nishidate, I., et al. Simultaneous Evaluation of Cerebral Hemodynamics and Light Scattering Properties of the In Vivo Rat Brain Using Multispectral Diffuse Reflectance Imaging. J. Vis. Exp. (2017)This video demonstrates the use of multispectral diffuse reflectance imaging to analyze cerebral blood flow, oxygen levels, and tissue structure changes in an anesthetized rat, providing insights into brain hemodynamics and morphology under varying conditions.
06:21
Diffuse Optical Spectroscopy for the Quantitative Assessment of Acute Ionizing Radiation Induced Skin Toxicity Using a Mouse Model
0 Views •
Cited by 13 •
2016
We present a diffuse optical spectroscopic (DOS) approach that provides quantitative optical biomarkers of skin response to radiation. We describe DOS instrumentation design, optical parameters extraction algorithms and the animal handling procedures required to yield representative data from a pre-clinical mouse model of radiation induced erythema.
FAQs
The measured spectrum reflects the combined effects of wavelength-dependent absorption and scattering. Chemical components influence how much light is absorbed, while structural features affect how photons are redirected before reaching the detector. Interpreting both contributions helps relate spectral changes to material composition and microstructural condition rather than treating intensity changes as evidence of a single factor.
Because detected photons originate from surfaces or near-surface regions, the measurement emphasizes properties within that optical sampling region. This makes the technique useful when surface condition or shallow tissue characteristics are relevant, but it also means that deeper features may contribute less strongly. In bioengineering, sampling depth therefore affects how tissue and construct measurements should be interpreted.
Broadband illumination records responses across multiple wavelengths, allowing wavelength-dependent changes in absorption and scattering to be examined together. Selected-wavelength illumination restricts the measurement to chosen spectral regions and can simplify targeted monitoring. The appropriate choice depends on whether the experiment requires a broader characterization of the sample or focused observation of specific optical responses.
The wavelength-dependent intensity provides optical information linked to the sample’s chemical and structural components. Changes in that response can support characterization of tissue, biomaterials, or engineered constructs and can help track biological processes. Since absorption and scattering both contribute, the spectrum is most useful as a combined optical signature of the measured region.
A typical measurement illuminates the sample with broadband or selected-wavelength light, collects diffusely reflected photons with a detector, and examines how intensity varies with wavelength. The resulting spectrum is then related to the sample’s absorbing and scattering properties. Minimal sample preparation supports rapid measurements, which is useful when repeated observations or screening are needed.
It can obtain optical information from tissue through reflected light without requiring the sample to be removed or extensively prepared. The measured response can reflect chemical and structural characteristics in near-surface regions, supporting tissue characterization and monitoring of biological processes. Its rapid measurement capability also makes it relevant to the development of biomedical sensing tools.
Measurements can be applied to biomaterials and engineered constructs to assess their optical responses and monitor changes associated with their chemical or structural components. In bioengineering, this supports characterization during research and contributes to quality-control approaches. The same measurement strategy can also assist development of optical tools for biomedical and research applications.