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Related Concept Videos

Imaging Biological Samples with Optical Microscopy01:18

Imaging Biological Samples with Optical Microscopy

Optical microscopy uses optic principles to provide detailed images of samples. Antonie van Leeuwenhoek designed the first compound optical microscope in the 17th century to visualize blood cells, bacteria, and yeast cells. In 1830, Joseph Jackson Lister created an essentially modern light microscope. The 20th century saw the development of microscopes with enhanced magnification and resolution.
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Confocal microscopy is an advanced microscopic technique. The prime advantage of the confocal microscope over other microscopy techniques is its ability to block the out-of-focus light from the illuminated samples using pinholes. It is widely used with fluorescence optics to obtain high-resolution, sharp contrast images. Unlike optical microscopes, confocal microscopes use a focused beam of light laser to scan the entire sample surface at different z-planes. These microscopes are, therefore,...

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Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping
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Diffuse optical imaging using spatially and temporally modulated light.

Thomas D O'Sullivan1, Albert E Cerussi, David J Cuccia

  • 1University of California, Irvine, Laser Microbeam and Medical Program (LAMMP), Beckman Laser Institute and Medical Clinic, Irvine, California, USA.

Journal of Biomedical Optics
|August 17, 2012
PubMed
Summary
This summary is machine-generated.

Diffuse optical imaging (DOI) uses modulated near-infrared light for in vivo tissue property measurements. This study details DOI theory, methods, and applications, focusing on photon density wave models.

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Area of Science:

  • Biomedical Optics
  • Medical Imaging
  • Photonics

Background:

  • Diffuse optical imaging (DOI) non-invasively measures tissue properties.
  • Near-infrared light propagation in thick tissues presents challenges.
  • Controlling light propagation using spatial and temporal modulation is key.

Purpose of the Study:

  • To present the theory and methods of diffuse optical imaging (DOI).
  • To focus on model-based techniques for quantitative in vivo measurements.
  • To review clinical and preclinical applications and future outlook of DOI.

Main Methods:

  • Utilizing spatial and temporal modulation of near-infrared light.
  • Applying model-based techniques for quantitative measurements.
  • Emphasizing the scalar photon density wave framework for frequency-domain approaches.

Main Results:

  • Demonstrated quantitative in vivo measurements of endogenous tissue absorption and scattering.
  • Presented the theoretical foundation and instrumentation for DOI.
  • Reviewed successful clinical and preclinical applications.

Conclusions:

  • DOI is a powerful tool for non-invasive tissue characterization.
  • Model-based techniques and photon density wave theory are central to DOI.
  • DOI holds significant promise for future clinical and preclinical applications.