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Author: Prashant Shukla
Publisher: LAP Lambert Academic Publishing
ISBN: 9783848489657
Category : Cancer
Languages : en
Pages : 164
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Book Description
The early detection and subsequent prevention of cancer have been a challenging task for researchers all over the world. Some of the conventional techniques used for the diagnosis of cancer are mammography, ultrasonography, magnetic resonance imaging (MRI), positron emission tomography (PET) and histopathology. In recent years, optical imaging is being developed as powerful techniques for the early and quick diagnosis of cancer. This book provides the information about polarimetric techniques and their applications in diagnosis of cancer in biological tissues. Polarization gating and Mueller decomposition imaging technique were addressed in the detail with their applications on cervical tissues and mimic of tissues (tissue phantoms). Polarization gated imaging can be used to detect mature tumors in the superficial layers. However, Mueller decomposition images have shown promising results about dysplasia in human cervical tissues. These images can be used to discriminate normal cervical tissue against the dysplastic (pre-cancerous) tissue. These results can be useful for clinical purposes and in the research work for diagnostic tools
Author: Prashant Shukla
Publisher: LAP Lambert Academic Publishing
ISBN: 9783848489657
Category : Cancer
Languages : en
Pages : 164
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Book Description
The early detection and subsequent prevention of cancer have been a challenging task for researchers all over the world. Some of the conventional techniques used for the diagnosis of cancer are mammography, ultrasonography, magnetic resonance imaging (MRI), positron emission tomography (PET) and histopathology. In recent years, optical imaging is being developed as powerful techniques for the early and quick diagnosis of cancer. This book provides the information about polarimetric techniques and their applications in diagnosis of cancer in biological tissues. Polarization gating and Mueller decomposition imaging technique were addressed in the detail with their applications on cervical tissues and mimic of tissues (tissue phantoms). Polarization gated imaging can be used to detect mature tumors in the superficial layers. However, Mueller decomposition images have shown promising results about dysplasia in human cervical tissues. These images can be used to discriminate normal cervical tissue against the dysplastic (pre-cancerous) tissue. These results can be useful for clinical purposes and in the research work for diagnostic tools
Author: Lingyan Shi
Publisher: CRC Press
ISBN: 1351797387
Category : Medical
Languages : en
Pages : 444
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Book Description
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.
Author: Valery V. Tuchin
Publisher: CRC Press
ISBN: 1000466302
Category : Science
Languages : en
Pages : 682
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Book Description
Biomedical photonics is currently one of the fastest growing fields, connecting research in physics, optics, and electrical engineering coupled with medical and biological applications. It allows for the structural and functional analysis of tissues and cells with resolution and contrast unattainable by any other methods. However, the major challenges of many biophotonics techniques are associated with the need to enhance imaging resolution even further to the sub-cellular level as well as translate them for in vivo studies. The tissue optical clearing method uses immersion of tissues into optical clearing agents (OCAs) that reduces the scattering of tissue and makes tissue more transparent and this method has been successfully used ever since. This book is a self-contained introduction to tissue optical clearing, including the basic principles and in vitro biological applications, from in vitro to in vivo tissue optical clearing methods, and combination of tissue optical clearing and various optical imaging for diagnosis. The chapters cover a wide range of issues related to the field of tissue optical clearing: mechanisms of tissue optical clearing in vitro and in vivo; traditional and innovative optical clearing agents; recent achievements in optical clearing of different tissues (including pathological tissues) and blood for optical imaging diagnosis and therapy. This book provides a comprehensive account of the latest research and possibilities of utilising optical clearing as an instrument for improving the diagnostic effectiveness of modern optical diagnostic methods. The book is addressed to biophysicist researchers, graduate students and postdocs of biomedical specialties, as well as biomedical engineers and physicians interested in the development and application of optical methods in medicine. Key features: The first collective reference to collate all known knowledge on this topic Edited by experts in the field with chapter contributions from subject area specialists Brings together the two main approaches in immersion optical clearing into one cohesive book
Author: Fred S. Azar
Publisher: Artech House
ISBN: 1596933089
Category : Medical
Languages : en
Pages : 431
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Book Description
Supported with 119 illustrations, this milestone work discusses key optical imaging techniques in self-contained chapters; describes the integration of optical imaging techniques with other modalities like MRI, X-ray imaging, and PET imaging; provides a software platform for multimodal integration; presents cutting-edge computational and data processing techniques that ensure rapid, cost-effective, and precise quantification and characterization of the clinical data; covers advances in photodynamic therapy and molecular imaging, and reviews key clinical studies in optical imaging along with regulatory and business issues.
Author: James G. Fujimoto
Publisher: Oxford University Press
ISBN: 0190287780
Category : Science
Languages : en
Pages : 440
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Book Description
Biomedical optical imaging is a rapidly emerging research area with widespread fundamental research and clinical applications. This book gives an overview of biomedical optical imaging with contributions from leading international research groups who have pioneered many of these techniques and applications. A unique research field spanning the microscopic to the macroscopic, biomedical optical imaging allows both structural and functional imaging. Techniques such as confocal and multiphoton microscopy provide cellular level resolution imaging in biological systems. The integration of this technology with exogenous chromophores can selectively enhance contrast for molecular targets as well as supply functional information on processes such as nerve transduction. Novel techniques integrate microscopy with state-of-the-art optics technology, and these include spectral imaging, two photon fluorescence correlation, nonlinear nanoscopy; optical coherence tomography techniques allow functional, dynamic, nanoscale, and cross-sectional visualization. Moving to the macroscopic scale, spectroscopic assessment and imaging methods such as fluorescence and light scattering can provide diagnostics of tissue pathology including neoplastic changes. Techniques using light diffusion and photon migration are a means to explore processes which occur deep inside biological tissues and organs. The integration of these techniques with exogenous probes enables molecular specific sensitivity.
Author: Charlotte Joanna Maughan Jones
Publisher:
ISBN:
Category :
Languages : en
Pages : 194
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Book Description
The ability to non-invasively estimate the optical properties of biological tissues in vivo would enable the advancement of quantitative optical based techniques such as photoacoustic imaging. It has, to date, proven difficult to make such an estimation for large three-dimensional tissue sections and small animals using optical approaches. To overcome this limitation, the correlation between the optical scattering properties, and the dark field x-ray phase contrast (XPCi), or "x-ray scattering" signal has been investigated. To do this, phantoms with unknown x-ray scattering, but controlled optical scattering were designed, and manufacturing methods developed, to enable simultaneous manufacture of phantoms suitable for either x-ray or optical imaging. Phantoms consisted of agarose, gel wax or silicone embedded with either TiO2 powder or silica microspheres. The x-ray phantoms were imaged using the edge illumination (EI) system at UCL. Due to the very low scattering and high absorption of many of the samples, along with the imperfect absorption of the masks in the EI system, existing scatter retrieval methods were unable to accurately determine the scattering properties of the phantoms. A novel, more sensitive x-ray scatter retrieval method was thus developed to overcome these problems. The optical scattering of phantoms was retrieved using a spectrophotometer combined the inverse adding doubling method. The optical and x-ray scattering of the phantoms was thus compared which did not reveal any correlation between the two. In order to assess a correlation between optical and x-ray scattering in biological tissue, Optical coherence tomography (OCT) was investigated as a method of determining the optical scattering properties. Along with the use of a controlled "calibration phantom", the optical properties of such tissues were determined. Finally, biological tissue samples were imaged using both OCT and EI-XPCi, and the optical and x-ray scattering properties compared, with no correlation observed.
Author: Xunbin Wei
Publisher: Springer Nature
ISBN: 9811576270
Category : Medical
Languages : en
Pages : 309
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Book Description
The book introduces readers to the basic principle of optical imaging technologies. Focusing on human disease diagnostics using optical imaging methods, it provides essential information for researchers in various fields and discusses the latest trends in optical imaging. In recent decades, there has been a huge increase in imaging technologies and their applications in human diseases diagnostics, including magnetic resonance imaging, x-ray computed tomography, and nuclear tomographic imaging. This book promotes further developments to extend optical imaging to a wider range of disease diagnostics. It is a valuable resource for researchers and students in the field of biomedical optics, as well as for clinicians.
Author: Khushbu Dipak Patel
Publisher:
ISBN:
Category : Diagnostic imaging
Languages : en
Pages : 58
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Book Description
In vivo fluorescence imaging is an emerging technique with potential for usage in non-invasive cancer screening, surveillance, real-time surgical guidance, and staging. Fluorescence imaging uses the interaction of non-ionizing optical radiation with endogenous fluorophores or fluorescent labels to provide real-time wide-field images of tissue structure and/or functional components. When imaging in vivo, excitation light must travel through overlying tissue to reach the fluorescent target and emitted fluorescence must then propagate back through the overlying tissue in order to be imaged onto a camera. Recently, fluorescent contrast agents have been developed with excitation and emission wavelengths in the near infrared (NIR) spectrum (~700 - 1,000 nm) in order to minimize attenuation and maximize the measured signal from tissue. While several clinical trials have shown the potential benefits of NIR contrast agents over visible fluorophores, there may still be room for improvement by moving to even longer wavelengths. As scattering is reduced as wavelength increases, some researchers are investigating fluorophores that emit in the short-wave infrared (SWIR) wavelength region (~1,000 - 2,300 nm). This study focuses on examining optical transmission and image contrast at NIR wavelengths and SWIR wavelengths to determine which wavelength region may be optimal for development of fluorescent contrast agents. Transmission and contrast measurements were performed on both tissue simulating phantoms and real biological tissues using 780 nm, 980 nm, and 1550 nm wavelengths. From the experiments conducted, it appears that fluorophore emissions should be chosen based on the goals of the specific application. For an application that requires simple detection of signal, near infrared wavelengths will be better as they can be detected with higher signal levels. For an application that focuses on imaging fluorophore-labeled tissues, short-wave infrared wavelengths will be the better option as they provided better image contrast.
Author: Rongguang Liang
Publisher: Springer Science & Business Media
ISBN: 3642283918
Category : Science
Languages : en
Pages : 391
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Book Description
This book provides an introduction to design of biomedical optical imaging technologies and their applications. The main topics include: fluorescence imaging, confocal imaging, micro-endoscope, polarization imaging, hyperspectral imaging, OCT imaging, multimodal imaging and spectroscopic systems. Each chapter is written by the world leaders of the respective fields, and will cover: principles and limitations of optical imaging technology, system design and practical implementation for one or two specific applications, including design guidelines, system configuration, optical design, component requirements and selection, system optimization and design examples, recent advances and applications in biomedical researches and clinical imaging. This book serves as a reference for students and researchers in optics and biomedical engineering.
Author: Ruikang K. Wang
Publisher: Taylor & Francis
ISBN: 1439895821
Category : Science
Languages : en
Pages : 726
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Book Description
Despite a number of books on biophotonics imaging for medical diagnostics and therapy, the field still lacks a comprehensive imaging book that describes state-of-the-art biophotonics imaging approaches intensively developed in recent years. Addressing this shortfall, Advanced Biophotonics: Tissue Optical Sectioning presents contemporary methods and
