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EBookClubs

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Book Beamforming in Medical Ultrasound Imaging

Download or read book Beamforming in Medical Ultrasound Imaging written by Babak Mohammadzadeh Asl and published by Springer Nature. This book was released on 2023-11-28 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book deals with the concept of medical ultrasound imaging and discusses array signal processing in ultrasound. Signal processing using different beamforming techniques in order to achieve a desirable reconstructed image and, consequently, obtain useful information about the imaging medium is the main focus of this book. In this regard, the principles of image reconstruction techniques in ultrasound imaging are fully described, and the required processing steps are completely expanded and analyzed in detail. Simulation results to compare the performance of different beamformers are also included in this book to visualize their differences to the reader. Other advanced techniques in the field of medical ultrasound data processing, as well as their corresponding recent achievements, are also presented in this book. Simply put, in this book, processing of medical ultrasound data from different aspects and acquiring information from them in different manners are covered and organized in different chapters. Before going through the detailed explanation in each chapter, it gives the reader an overview of the considered issue and focuses his\her mind on the challenge ahead. The contents of the book are also presented in such a way that they are easy for the reader to understand. This book is recommended for researchers who study medical ultrasound data processing.

Book Ultrasound B mode Imaging Beamforming and Image Formation Techniques

Download or read book Ultrasound B mode Imaging Beamforming and Image Formation Techniques written by Giulia Matrone and published by MDPI. This book was released on 2019-10-04 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ultrasound medical imaging stands out among the other diagnostic imaging modalities for its patient-friendliness, high temporal resolution, low cost, and absence of ionizing radiation. On the other hand, it may still suffer from limited detail level, low signal-to-noise ratio, and narrow field-of-view. In the last decade, new beamforming and image reconstruction techniques have emerged which aim at improving resolution, contrast, and clutter suppression, especially in difficult-to-image patients. Nevertheless, achieving a higher image quality is of the utmost importance in diagnostic ultrasound medical imaging, and further developments are still indispensable. From this point of view, a crucial role can be played by novel beamforming techniques as well as by non-conventional image formation techniques (e.g., advanced transmission strategies, and compounding, coded, and harmonic imaging). This Special Issue includes novel contributions on both ultrasound beamforming and image formation techniques, particularly addressed at improving B-mode image quality and related diagnostic content. This indeed represents a hot topic in the ultrasound imaging community, and further active research in this field is expected, where many challenges still persist.

Book Doppler Ultrasound

Download or read book Doppler Ultrasound written by David H. Evans and published by . This book was released on 1989-03-27 with total page 330 pages. Available in PDF, EPUB and Kindle. Book excerpt: A description of the physical principles upon which Doppler ultrasound is based and the instrumentation and processing necessary to measure and record the flows from within the body. Clinical applications are surveyed to demonstrate the method's potential and illustrate technical data.

Book Real time Software based Ultrasound Image Formation for Array Transducer Systems

Download or read book Real time Software based Ultrasound Image Formation for Array Transducer Systems written by William A. Steelman and published by . This book was released on 2013 with total page 103 pages. Available in PDF, EPUB and Kindle. Book excerpt: Noninvasive and multi-purposed, with uses ranging from fetal monitoring to cancer detection, medical ultrasound is one of the most widely utilized diagnostic tools in medicine today. Recent trends to proliferate its use and improve patient care require that ultrasound systems become more portable and less expensive. However, high resolution images needed in medical ultrasound rely on multichannel ultrasonic transducers requiring expensive, dedicated hardware to perform beamforming. This dissertation explores the reduction of hardware requirements for multi-channel ultrasound image formation through the use of software-based beamforming. First, the requirements and computational complexity of software-based ultrasound image formation are investigated. Then, a new beamforming algorithm is presented, introducing sparse upsampling as a means to reduce computational complexity. Performance and noise implications of this new algorithm are also investigated. Finally, a framework for parallelizing beamforming and other image processing functions is introduced. This framework is used to implement real-time, software-based ultrasound image formation for an annular array use case. This new beamforming algorithm, used in conjunction with the parallel processing framework eliminates the need for hardware-based beamforming, reducing the overall cost and complexity of multichannel ultrasound probes.

Book Doppler Ultrasound and Its Use in Clinical Measurement

Download or read book Doppler Ultrasound and Its Use in Clinical Measurement written by Peter Atkinson and published by . This book was released on 1982 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Clinical Applications of Doppler Ultrasound

Download or read book Clinical Applications of Doppler Ultrasound written by Kenneth J. W. Taylor and published by Lippincott Williams & Wilkins. This book was released on 1988 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book High Frequency Ultrasound Beamforming for a Minimally Invasive Endoscopic Probe

Download or read book High Frequency Ultrasound Beamforming for a Minimally Invasive Endoscopic Probe written by Christopher Samson and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Many surgeries are trending toward minimally-invasive procedures to reduce patient recovery times and produce fewer complications. These procedures are characterized by having small surgical openings, making it difficult to use medical imaging equipment not specifically designed to fit into small openings. Clinicians use laparoscopes or other optical microscopes as the primary tools for endoscopic surgeries, but these tools only provide imaging at the surface and lack depth-resolved information that would be of utmost value. Recently, a high-frequency endoscopic phased-array imaging probe has been developed which provides an unprecedented combination of depth-resolved imaging resolution with a minimally-invasive form factor (2.5 x 3.0 mm). This technology has the potential to provide enhanced image guidance capabilities to a wide array of surgical applications. To be suitable for medical imaging applications we developed a suitable electronic imaging system, commonly referred to as a beamformer, to support this imaging probe. This system was the world's first real-time beamformer for high-frequency phased array imaging and uses a newly developed variable sampling scheme termed the 'One Sample per Pixel' technique for image formation. This hardware and imaging technique generate high-quality ultrasonic images in real-time. We improved on the system's capabilities by implementing ultrafast imaging techniques that greatly increased the system's usefulness while simultaneously developing a new ultrafast imaging technique for sector imaging called sparse orthogonal diverging wave imaging (SODWI), which offers a variety of advantages over similar techniques. These capabilities were applied to functional ultrasound imaging in a preclinical setting where we were able to detect the neurological activation of auditory structures in rats, in particular, the inferior colliculus. This functional ultrasound experiment was performed through a 3.5 x 6.0 mm opening, which is smaller than any previous functional ultrasound experiments in the literature. Future directions for developing the system and new applications of these technologies are described.

Book Energy Scalable Systems for 2D and 3D Low power Ultrasound Beamforming

Download or read book Energy Scalable Systems for 2D and 3D Low power Ultrasound Beamforming written by Bonnie Kit Ying Lam and published by . This book was released on 2017 with total page 125 pages. Available in PDF, EPUB and Kindle. Book excerpt: In traditional ultrasound imaging systems, bulky and power-intensive mainframes are used to process the high number of waveforms acquired in parallel from a large transducer array. The computational power of these systems scales linearly with transducer count. However, there exist applications where basic functionality in low-power conditions may be favorable to an "all-or-nothing" system that only produces a high resolution image when enough power is supplied. This thesis presents systems designed to support energy-scalability at run-time, enabling the user to make the tradeoff between power and performance. First, a system-level energy model for a receive-side digital beamforming system is presented. Power-performance tradeoffs for the analog front-end, analog-to-digital converter, and digital beamformer are analyzed individually and then combined to account for the performance dependency between the functional components. These considerations inform a recommendation on design choices for the end-to-end system. Second, this thesis describes an energy-scalable 2-D beamformer that provides user-controlled run-time tradeoff between image quality and energy consumption. Architectural design choices that enable three operating modes are discussed. A test chip was fabricated in 65-nm low power CMOS technology. It can operate with functional correctness at 0.49 V, with a measured power of 185 [mu]W in real-time operation at 0.52 V. Finally, a software-based energy-scalable 3-D ultrasound beamformer is implemented on an embedded supercomputer. The energy consumption and corresponding imaging quality are measured and compared.

Book Development of Integrated Optical Coherence Tomography Ultrasound System for Intravascular Imaging

Download or read book Development of Integrated Optical Coherence Tomography Ultrasound System for Intravascular Imaging written by Jiechen Yin and published by . This book was released on 2011 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt: Optical coherence tomography (OCT) is a noninvasive, noncontact imaging modality that uses coherent gating to obtain high-resolution cross-sectional images of the microstructure of biological tissues. Recently, OCT has been considered as a promising technique for intravascular imaging, since it provides direct visualization of vessel walls with resolutions of 1-2 orders higher than intravascular ultrasound (IVUS). However, there are two major drawbacks for OCT: limited penetration depth makes it difficult to image the whole depth of atherosclerotic plaques and clearance of blood is required since the presence of blood can seriously attenuate OCT signals. OCT and ultrasound (US) are complementary in the application of intravascular imaging. This research focuses on the development of an integrated OCT-US system for the application of intravascular imaging. By combining the two imaging modalities, the system is capable of offering simultaneous OCT and ultrasound images in real-time, thus allowing for images with both high resolution and a deep imaging depth which will significantly improve diagnostic accuracy in the detection of atherosclerosis. OCT-US probes that combine OCT optical components and US transducers have been developed. Different probe designs have been realized based on different applications; and the latest version of the miniature design aimed at human coronary artery imaging has a maximum outer diameter of only 0.69mm. A rotary joint that combines a fiber optic rotary joint and electrical slip ring has been developed, so that both optical and electrical signals can be transmitted between the stationary and rotary parts of the system. The integrated imaging system provides real-time simultaneous OCT and US data acquisition, processing and image display by using a single two-channel data acquisition board and a home-developed OCT-US program. In vitro human coronary specimen imaging and in vivo animal studies have been performed to demonstrate the feasibility of our OCT-US system in the application of intravascular imaging. Last but not least, a 3-dimensional high speed endoscopic OCT system has been developed for the application of airway imaging. In vivo animal studies of smoke-induced early airway injury were performed using this system. Image processing software has been successfully developed for motion artifact removal, image reconstruction and quantitative analysis of airway thickness.