3 research outputs found

    Looking Forward with Minimally Invasive Ultrasound

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    Minimally invasive procedures are increasingly replacing traditional open surgeries due to their shorter recovery time, reduced patient pain, reduced risk of infection and less trauma. However, since the physician has no direct view of the working field, visualization of these complex interventions is critical for success. Forward-looking (FL) ultrasound image guidance can aid minimally invasive procedures providing visual feedback of the working field, instrument location and treatment progress. Currently there are no clinically available devices that can provide minimally invasive 3D FL imaging. In this thesis we explored several innovative solutions towards miniaturized 3D FL imaging. We looked into methods to solve both hardware and image-related challenges resulting in mainly two approaches. The first approach consists in the realization of a complex multi-element transducer with an optimized design and an efficient interconnection and integration scheme. The second approach consists in the use of s

    Recent Advances in Signal Processing

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    The signal processing task is a very critical issue in the majority of new technological inventions and challenges in a variety of applications in both science and engineering fields. Classical signal processing techniques have largely worked with mathematical models that are linear, local, stationary, and Gaussian. They have always favored closed-form tractability over real-world accuracy. These constraints were imposed by the lack of powerful computing tools. During the last few decades, signal processing theories, developments, and applications have matured rapidly and now include tools from many areas of mathematics, computer science, physics, and engineering. This book is targeted primarily toward both students and researchers who want to be exposed to a wide variety of signal processing techniques and algorithms. It includes 27 chapters that can be categorized into five different areas depending on the application at hand. These five categories are ordered to address image processing, speech processing, communication systems, time-series analysis, and educational packages respectively. The book has the advantage of providing a collection of applications that are completely independent and self-contained; thus, the interested reader can choose any chapter and skip to another without losing continuity
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