deep imaging in tissue and biomedical materials using linear and nonlinear optical methods pdf

Deep imaging in tissue and biomedical materials using linear and nonlinear optical methods pdf

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Computational time-of-flight diffuse optical tomography

Review ARTICLE

Deep Imaging in Tissue and Biomedical Materials: Using Linear and Nonlinear Optical Methods

Computational time-of-flight diffuse optical tomography

Edited by R. Boyd, S. Lukishova, and Y. Shen, Springer, Berlin, 77, chapter downloads as of June Boyd, M.

Review ARTICLE

Shortwave infrared radiation SWIR is the portion of the electromagnetic spectrum from approximately nm to nm. Recent advances in imaging systems have expanded the application of SWIR emitters from traditional fields in materials science to biomedical imaging, and the new detectors in SWIR opened an opportunity of deep tissue imaging. Achieving deep photon penetration while maintaining high resolution is one of the main objectives and challenges in bioimaging used for the investigation of diverse processes in living organisms. The application of SWIR emitters in biological settings is, however, hampered by low quantum efficiency. So far, photoluminescent properties in the SWIR region have not been improved by extending concepts that have been developed for the visible — nm and near-infrared NIR, — nm wavelengths, which indicates that the governing behavior is fundamentally different in the SWIR. The focus of this minireview is to examine the mechanisms behind the low efficiency of SWIR emitters as well as to highlight the progress in their design for biological applications. Several common mechanisms will be considered in this review: a the effect of the energy gap between the excited and ground state on the quantum efficiency, b the coupling of the excited electronic states in SWIR emitters to vibrational states in the surrounding matrix, and c the role of environment in quenching the excited states.

The use of light for probing and imaging biomedical media is promising for the development of safe, noninvasive, and inexpensive clinical imaging modalities with diagnostic ability. The advent of ultrafast lasers has enabled applications of nonlinear optical processes, which allow deeper imaging in biological tissues with higher spatial resolution. This book provides an overview of emerging novel optical imaging techniques, Gaussian beam optics, light scattering, nonlinear optics, and nonlinear optical tomography of tissues and cells. It consists of pioneering works that employ different linear and nonlinear optical imaging techniques for deep tissue imaging, including the new applications of single- and multiphoton excitation fluorescence, Raman scattering, resonance Raman spectroscopy, second harmonic generation, stimulated Raman scattering gain and loss, coherent anti-Stokes Raman spectroscopy, and near-infrared and mid-infrared supercontinuum spectroscopy. The book is a comprehensive reference of emerging deep tissue imaging techniques for researchers and students working in various disciplines. Navigationsleiste aufklappen. Sehr geehrter ZLibrary-Benutzer!

Deep Imaging in Tissue and Biomedical Materials: Using Linear and Nonlinear Optical Methods

Quantitative single-cell analysis enables the characterization of cellular systems with a level of detail that cannot be achieved with ensemble measurement. In this Feature we explore quantitative cellular imaging applications with nonlinear microscopy techniques. We first offer an introductory tutorial on nonlinear optical processes and then survey a range of techniques that have proven to be useful for quantitative live cell imaging without fluorescent labels.

Non-linear optical NLO microscopy has proven to be a powerful tool especially for tissue imaging with sub-cellular resolution, high penetration depth, endogenous contrast specificity, pinhole-less optical sectioning capability. In this review, we discuss label-free non-linear optical microscopes including the two-photon fluorescence TPF , fluorescence lifetime imaging microscopy FLIM , polarization-resolved second harmonic generation SHG and coherent anti-Stokes Raman scattering CARS techniques with various samples. Again, the non-linear signals are very specific to the molecular structure of the sample and its relative orientation to the polarization of the incident light. Thus, polarization-resolved non-linear optical microscopy provides high image contrast and quantitative estimate of sample orientation.

5 comments

  • Alvin P. 15.05.2021 at 18:34

    Request PDF | Deep Imaging in Tissues and Biomedical Materials using Linear and Non-Linear Optical Methods | The use of light for probing and imaging.

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  • Tanja B. 21.05.2021 at 10:45

    Multimodal imaging platforms offer a vast array of tissue information in a single image acquisition by combining complementary imaging techniques.

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