Download or read book Fully Integrated CMOS Ultrasound Transceiver Chip for High frequency High resolution Ultrasonic Imaging Systems written by In Soo Kim and published by . This book was released on 2009 with total page 157 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ultrasound techniques are common for diagnostic imaging and often supersede X-ray imaging in medical sectors. Recently studies for imaging smaller organs or surfaces, such as skin, the gastrointestinal tract, and intravascular blood vessels, have emerged utilizing ultrasounds with frequencies over 20 MHz. A need remains for better clinical ultrasound imaging for detecting tumors and micro-sized tissues in vivo without the use of biopsy. In addition, a recent demand for portable ultrasound imaging systems in medical services has emerged. However, conventional ultrasound imaging systems have complicated electronics and high voltage transducers connected via bulky and expensive cables. Thus, over two decades many researchers have tried to miniaturize ultrasound imaging systems, and applied mixed-signal IC design techniques for integrating the front-end electronics on a single IC chip. However, no one has yet achieved an ultrasound imaging system with a fully integrated, custom-designed front-end IC chip that combines transmitters and receivers with high-resolution A/D converters and high-capacity on-chip memory devices. The proposed CMOS ultrasound transceiver chip enables development of portable high-resolution, high-frequency ultrasonic imaging systems. The transceiver chip design incorporates closed-coupled thin film ultrasound transducer array which operates with a 3.3 V power supply. In addition, a prototype chip, supported by digital beamforming system architecture, contains 16 receive and transmit channels with preamplifiers, Time-Gain compensation amplifiers, multiplexed Analog-to-Digital (A/D) converter with 3 Kbyte on-chip SRAM, and 50-MHz resolution time-delayed excitation pulse generators. By utilizing a shared A/D converter architecture, the numbers of A/D converters and SRAMs are reduced to one, although typical digital beamforming systems need 16 A/D converter for 16 receive channels. The carefully designed preamplifier minimizes stray capacitance and resistance between the transducers and the transceiver chip for ease of impedance matching and shows 100 MHz bandwidth at a gain of 20 dB. The VGA shows 23 dB linear gain, control range with 250 MHz bandwidth. The implemented TIQ ADC (Threshold Quantization Inverter A/D converter) achieves fast data conversion speed. Specified 6-bit resolution at a conversion speed of 250 MS/s was achieved. Further, this study presents a highly efficient TIQ comparator design methodology based on an analytical model for TIQ ADCs. The TIQ technique has gained importance in high speed flash A/D converters due to their fast data conversion speeds. The key to TIQ comparators' designs is to generate different-sized TIQ comparators for an n-bit A/D converter; however, this technique is difficult and time-consuming for a higher-bit A/D converter. Thus, this thesis suggests a design algorithm based on MOSFET's current SPICE model, and a customized program that automatically generates the TIQ comparators. The proposed methodology improves TIQ ADC design accuracy by 55% and reduces design time by approximately by 75%. To substantiate the technology, ultrasound signal acquisition experiments include pitch mode, catch mode, and pitch-catch mode tests, using the thin film ultrasound transducer arrays and the high frequency composite transducer arrays. The experimental results demonstrate the viability of the proposed chip architecture and designs, and the feasibility of the proposed ultrasound imaging system.
Download or read book Ultrasound in Dermatology written by Peter Altmeyer and published by Springer. This book was released on 1992 with total page 480 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A High Resolution Ultrasonic Imaging System written by Scott William Easterbrook and published by . This book was released on 1985 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Measuring the Skin written by Pierre G. Agache and published by Springer Science & Business Media. This book was released on 2004-07-15 with total page 814 pages. Available in PDF, EPUB and Kindle. Book excerpt: Measuring the Skin presents all techniques devoted to non-invasive normal or diseased skin measurement. As opposed other books, this text embraces old and new validated techniques for all skin suborgans and functions. The book is ideal as a small encyclopedia since it provides the answer to any question concerning skin measurement. Each technique is discussed to help select the most appropriate one for each special case. Another novel feature is that the book bases the skin investigation on the physiology and anatomy. Each chapter is preceded by a compendium of current knowledge on the structure or function dealt with. The book may also be used as a research tool. It contains a novel, and presently unique list of more than 400 physical and biological skin constants, which are all referenced.
Download or read book In vivo Ultrasonic Imaging of Skin Using Plastic Film Transducers written by C. J. Hacking and published by . This book was released on 1991 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Advances in Acoustic Microscopy and High Resolution Imaging written by Roman Gr. Maev and published by John Wiley & Sons. This book was released on 2013-02-04 with total page 393 pages. Available in PDF, EPUB and Kindle. Book excerpt: Novel physical solutions, including new results in the field of adaptive methods and inventive approaches to inverse problems, original concepts based on high harmonic imaging algorithms, intriguing vibro-acoustic imaging and vibro-modulation technique, etc. were successfully introduced and verified in numerous studies of industrial materials and biomaterials in the last few years. Together with the above mentioned traditional academic and practical avenues in ultrasonic imaging research, intriguing scientific discussions have recently surfaced and will hopefully continue to bear fruits in the future. The goal of this book is to provide an overview of the recent advances in high-resolution ultrasonic imaging techniques and their applications to biomaterials evaluation and industrial materials. The result is a unique collection of papers presenting novel results and techniques that were developed by leading research groups worldwide. This book offers a number of new results from well-known authors who are engaged in aspects of the development of novel physical principles, new methods, or implementation of modern technological solutions into current imaging devices and new applications of high-resolution imaging systems. The ultimate purpose of this book is to encourage more research and development in the field to realize the great potential of high resolution acoustic imaging and its various industrial and biomedical applications.
Download or read book Bioengineering of the Skin written by Klaus-Peter Wilhelm and published by CRC Press. This book was released on 2006-09-27 with total page 542 pages. Available in PDF, EPUB and Kindle. Book excerpt: Spanning the many advancements that have taken place in the field since the First Edition of this book was published, this Second Edition emphasizes the imaging of the skin in its entirety, rather than focusing solely on surface layers. The Second Edition includes new chapters on technologies such as in vivo confocal laser scanning microscopy, Rama
Download or read book Photoacoustic Tomography written by Minghua Xu and published by CRC PressI Llc. This book was released on 2014-09-30 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Recent Developments in Therapies and Diagnostic Tools for Melanoma and Non melanoma Skin Cancer written by Taku Fujimura and published by Frontiers Media SA. This book was released on 2021-04-13 with total page 129 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Advances in Acoustic Microscopy written by Andrew Briggs and published by Springer Science & Business Media. This book was released on 2013-11-11 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the second volume of Advances in Acoustic Microscopy. It continues the aim of presenting applications and developments of techniques that are related to high-resolution acoustic imaging. We are very grateful to the authors who have devoted considerable time to preparing these chapters, each of which describes a field of growing importance. Laboratories that have high-performance acoustic microscopes are frequently asked to examine samples for which the highest available resolution is not necessary, and the ability to penetrate opaque layers is more significant. Such applications can be thought of as bridging the gap be tween acoustic microscopy at low gigahertz frequencies, and on the one hand nondestructive testing of materials at low megahertz frequencies and on the other hand medical ultrasonic imaging at low megahertz frequencies. Commercial acoustic microscopes are becoming increasingly available and popular for such applications. We are therefore delighted to be able to begin the volume with chapters from each of those two fields. The first chapter, by Gabriele Pfannschmidt, describes uses of acoustic microscopy in the semiconductor industry. It provides a splendid balance to the opening chapter of Volume 1, which came from a national research center, being written from within a major European electronics industry itself. Dr Pfann schmidt describes the use of two quite different types of acoustic microscopes, and points out the advantages of each for specific purposes.
Download or read book Biomedical Index to PHS supported Research written by and published by . This book was released on 1990 with total page 1060 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book High Resolution Ultrasonic Scanning of Animal and Human Tissue in Vivo written by Roberta L. Roswell and published by . This book was released on 1977 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book High Resolution Ultrasonic Imaging System written by Ashley Harford Goode and published by . This book was released on 1989 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Handbook of Cosmetic Science and Technology written by André O. Barel and published by CRC Press. This book was released on 2009-03-03 with total page 890 pages. Available in PDF, EPUB and Kindle. Book excerpt: Edited by a team of experienced and internationally renowned contributors, the updated Third Edition is the standard reference for cosmetic chemists and dermatologists seeking the latest innovations and technology for the formulation, design, testing, use, and production of cosmetic products for skin, hair, and nails.New features in the Third Editi
Download or read book Bioengineering and the Skin written by and published by . This book was released on 1988 with total page 428 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Imaging in Dermatology written by Michael R. Hamblin and published by Academic Press. This book was released on 2016-07-29 with total page 562 pages. Available in PDF, EPUB and Kindle. Book excerpt: Imaging in Dermatology covers a large number of topics in dermatological imaging, the use of lasers in dermatology studies, and the implications of using these technologies in research. Written by the experts working in these exciting fields, the book explicitly addresses not only current applications of nanotechnology, but also discusses future trends of these ever-growing and rapidly changing fields, providing clinicians and researchers with a clear understanding of the advantages and challenges of laser and imaging technologies in skin medicine today, along with the cellular and molecular effects of these technologies. - Outlines the fundamentals of imaging and lasers for dermatology in clinical and research settings - Provides knowledge of current and future applications of dermatological imaging and lasers - Coherently structured book written by the experts working in the fields covered
Download or read book Small Animal Imaging written by Fabian Kiessling and published by Springer. This book was released on 2017-05-22 with total page 871 pages. Available in PDF, EPUB and Kindle. Book excerpt: This textbook is a practical guide to the use of small animal imaging in preclinical research that will assist in the choice of imaging modality and contrast agent and in study design, experimental setup, and data evaluation. All established imaging modalities are discussed in detail, with the assistance of numerous informative illustrations. While the focus of the new edition remains on practical basics, it has been updated to encompass a variety of emerging imaging modalities, methods, and applications. Additional useful hints are also supplied on the installation of a small animal unit, study planning, animal handling, and cost-effective performance of small animal imaging. Cross-calibration methods and data postprocessing are considered in depth. This new edition of Small Animal Imaging will be an invaluable aid for researchers, students, and technicians involved in research into and applications of small animal imaging.
