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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 14 of 14 for “"B mode ultrasound"”.
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Utilization Of B-Mode Ultrasound As A Body Fat Estimate In Collegiate Football Players
… of the present study was to validate a 7-site ultrasound imaging protocol to predict percent body fat (%BF) in a Division I football team. Body composition was estimated by ultrasound, seven site skinfolds (SKINFOLD), and the three compartment-water (3C-W) model of Siri (1961), using …
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Measuring the absolute concentration of particles in suspension using high frequency B-mode ultrasound imaging
… and incapable of in vivo measurements. An ultrasound-based method has several unique advantages. It can be nondestructive and noninvasive, which allows a much larger portion of the sample to be analyzed, improving the accuracy and decreasing required sample volume. Also, ultrasound methods …
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Detection of muscle damage by B-mode ultrasonography : relationship between echo intensity and histological changes following injection of bupivacaine to rat hind limb muscles
It is reported that the echo intensity of B-mode ultrasound images increases when human elbow flexors are damaged by eccentric exercise. However, it is unknown what causes the increase in echo intensity, and its relationship to histological changes is unexplored. This study tests the hypothesis …
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Machine Learning and Biomechanical Sensing Toward Real-Time In-The-Loop Gait and Joint Health Optimization
… signals from muscle and tendon structures using ultrasound and active acoustics. To achieve this, we (Aim 1) developed a machine learning pipeline for real-time estimation of muscle fascicle lengths from B-mode ultrasound images to enable “muscle-in-the-loop” feedback systems; (Aim 2) introduced …
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Deep Photoacoustic Imaging and Acoustic Cavitation Mapping in Shockwave Lithotripsy
… used in SWL (e.g., C-arm fluoroscopy and B-mode ultrasound) are not sensitive to vascular injuries. To better understand the mechanism of tissue injury and improve treatment safety and efficiency, it is highly desirable to concurrently detect cavitation and vascular injury during SWL. …
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Synchronization of estrus, conception rate, and embryonic mortality in beef cattle following treatment with progesterone-releasing intravaginal devices or melengestrol acetate in conjunction with PGF₂α
… on the final day of treatment. Real time, B-mode, ultrasound with a 7.5 mHz linear-array transducer was used to conduct three ovarian scans at 7-d intervals beginning 7 d prior to initiation of treatment. Jugular blood samples were collected at each scanning period. Serum was harvested and …
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Single Crystal Based Ultrasound Actuated Needle For Regional Anaesthesia and Biopsy
Ultrasound guidance of needle-based regional anaesthesia and tissue biopsy is widely used in clinical practice. Ultrasound imaging has improved the efficacy and reduced some side effects during regional nerve block. However, the presentation and interpretation of real-time ultrasound guided needle …
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System Optimization and Iterative Image Reconstruction in Photoacoustic Computed Tomography for Breast Imaging
… techniques including X-ray mammography, B-mode ultrasound, and MRI suffer from low contrast, low specificity for certain breast types, and additional risks related to ionizing radiation. Though significant works have been done to push the frontier of PACT breast imaging, it is still …
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Computer basiertes Lernprogramm über die physikalisch-technischen Grundlagen der Sonografie beim Kleintier
… „SonoBasics – physical technical basics of ultrasound in small animals“ is based on a concept not realised so far. Many veterinarians lack the knowledge of physical and technical basics of ultrasound and furthermore the colleagues avoid to work up the supposedly boring topic in technical …
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Differential effect of melengestrol acetate or progesterone-releasing intravaginal devices on follicular development, progesterone and estradiol-17β concentrations and patterns of luteinizing hormone release during the bovine estrous cycle
… as untreated controls (n = 14). Real time, B-mode ultrasound, equipped with a 7.5 mHz linear-array transrectal transducer, was used to conduct daily ovarian scans beginning 3 (Study 1) or 9 d (Study 2) after onset of estrus. Jugular venous blood samples (45 ml) were collected coincident with …
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Study of damage to peripheral nerves caused by anaesthetic needles during regional anaesthesia
<b>Background</b>: Ultrasound guidance is strongly recommended for the safe conduct of regional anaesthesia procedures. It is safe, now has adequate spatial resolution and provides real time visualization of local anaesthetic spread. However, the risk of nerve trauma still remains. A recent …
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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 …
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A 3-D Multiparametric Ultrasound Elasticity Imaging System for Targeted Prostate Biopsy Guidance
… serum, clinical guidelines recommend transrectal ultrasound-guided biopsy. However, lesions are often indistinguishable from noncancerous prostate tissue in conventional B-mode ultrasound images, which have a diagnostic sensitivity of about 30%, so the biopsy is not typically targeted to …
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Spatial Coherence-Based Adaptive Acoustic Output Selection for Diagnostic Ultrasound
… 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 unnecessary risk …