Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 17 of 17 for “"Diagnostic ultrasound"”.
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Technology strategy : the case of the diagnostic ultrasound industry
Thesis (Ph. D.)--Massachusetts Institute of Technology, Sloan School of Management, 1987.
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Spatial Coherence-Based Adaptive Acoustic Output Selection for Diagnostic Ultrasound
… guidelines for maximum acoustic output for diagnostic ultrasound imaging through metrics such as intensity, Mechanical Index (MI), and Thermal Index (TI). However, even within these guideline values, if the acoustic exposure levels used do not benefit image quality, they represent an …
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In Vitro Effects of Actively Delivered Coencapsulated Curcumin and Cisplatin Nanoliposomes on Squamous Oral Carcinoma
… controlled release of the drugs loaded within. Diagnostic ultrasound energy was then employed as a tool to achieve controlled release from the newly developed multidrug carriers at a frequency of 7.5 MHz and four different power intensities depending on the pulse repetition time. The optimal …
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A novel method of producing microbubbles for targeted drug delivery.
Microbubbles, currently employed in diagnostic ultrasound as a contrast agent, have a potential new application as vehicles for targeted drug delivery, which could revolutionise medicine by eliminating side-effects. A new device is developed which outperforms all existing devices in terms of …
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Real time motion tracking in image guided focused ultrasound intervention
Focused ultrasound surgery (FUS) or high intensity focused ultrasound (HIFU), is a promising technique for less- or non-invasively destroying unhealthy tissue deep inside the body, without damage to the skin or surrounding tissues. The procedure has been performed under both diagnostic ultrasound …
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Descriptive analysis of the musculoskeletal case load referred for ultrasound imaging in an Auckland imaging practice : a case study
BACKGROUND: Musculoskeletal ultrasound (MSK US) imaging provides visualisation of a large number of superficial anatomical structures including nerves, joints, ligaments, tendons and muscles. The utility of ultrasound has been compared to other common imaging techniques such as Magnetic Resonance …
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Labview controlled study of the propagation properties of ultrasound in synthetic fog environment
Diagnostic ultrasound employs pulsed, high frequency sound waves that are reflected back from body tissues and processed by ultrasound receivers to create characteristic images in varied applications such as cardiology, obstetrics and gynecology neurology and urology. Ultrasound intensity is …
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Conoscenza e consapevolezza sugli effetti biologici degli ultrasuoni nella pratica clinica in Italia: risultati di una inchiesta con questionario tra ecografisti della socetà italiana di ultrasonologia in medicina e biologia (S.I.U.M.B.)
Background New potential hazards in the use of ultrasound (US) are implied in new diagnostic applications of US, such as contrast enhanced US. Aim To assess the level of awareness and knowledge on safety issues of clinical use of US among physicians who are members of the Italian National Society …
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Ultrasonic absorption in soft and hard fetal tissues
Although the use of ultrasound as a diagnostic modality in obstetrics has become ubiquitous, concern that harmful effects may occur under special circumstances continues. A physical mechanism by which biological effects could occur is the deposition of heat in the tissue as a result of the energy …
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Ultrasound stimulated acoustic emission for monitoring thermal surgery
Therapeutic ultrasound describes a non-invasive surgical technique by which high-energy ultrasound is delivered to malignant tissue. This method must be monitored in order to ensure that the correct tissues are treated and that the tissues are treated with the proper dose. Typically, therapeutic …
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The Achilles tendon : an evaluation of the healing processes occuring with chronic pathology; using a prospective comparison study of conservative treatment regimes and micro-current application
… assessment by the subject and assessment by diagnostic ultrasound. Subjects were assessed at three, six and twelve month intervals post entry into the study. Forty eight subjects, twenty four in each group completed the study. A statistical analysis was performed, calculating the differences …
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Distinguishing characteristics of thoracic medial paraspinal structures determined as abnormal by palpation
… palpation has been proposed to be an important diagnostic finding in osteopathic medicine. The pathophysiology of tissues at sites detected as abnormal by palpation and reported as tender by the subject (AbPT) is speculative, because evidence of objective characteristics that distinguish …
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Backscatter Spatial Coherence for Ultrasonic Image Quality Characterization: Theory and Applications
<p>Adaptive ultrasound systems, designed to automatically and dynamically tune imaging parameters based on image quality feedback, represent a promising solution for reducing the user-dependence of ultrasound. The efficacy of such systems, however, depends on the ability to accurately and reliably …
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The Potential for Ultrasonic Image-Guided Therapy Using a Diagnostic System
<p>Ultrasound can be used for a variety of therapeutic purposes. High-intensity focused ultrasound (HIFU) has progressed over the past decade to become a viable therapeutic method and is valuable as a non-invasive alternative to many surgical procedures. Ultrasonic thermal therapies can also be …
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The Mechanism of Action of Hyaluronan Therapy as a Treatment for Osteoarthritis and the Assessment of Osteoarthritic Articular Cartilage Using Ultrasound
… and tissue level, and (2) whether quantitative ultrasound imaging can detect early degenerative changes in articular cartilage before irreversible osteoarthritic damage develops. By combining molecular characterisation, ex vivo cartilage experiments, and advanced ultrasound imaging, the research …