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 7 of 7 for “"Ultrasonic detection"”.
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Computational Techniques for Advancing Photoacoustic Microscopy
… modality that combines optical excitation and ultrasonic detection, has attracted considerable attention in basic and translational research. PAM not only enables in vivo label-free vascular imaging at the microscopic level, but also facilitates the assessment of hemodynamics and oxygen …
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Development of High-speed Photoacoustic Imaging technology and Its Applications in Biomedical Research
… optical imaging and the deep penetration from ultrasonic imaging, and provides rich optical-absorption–based images. PAT has been widely used in extracting structural and functional information from both ex vivo tissue samples to in vivo animals and humans with different length scales by …
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Photoacoustic Tomography of Diabetes and Reporter Genes
… which combines light absorption contrast with ultrasonic detection to achieve deep imaging of normally obscured absorbing molecules in tissue. PAT's inherent background free, super-depth imaging capability makes it particularly well suited for functional and molecular studies. When using …
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Minimally invasive capacitive micromachined ultrasonic transducers array For biomedical applications
… to medical diagnosis and treatment. The ultrasonic transducer plays an important role in determining the resolution, sensitivity, as well as other critical diagnostic capabilities of an ultrasonic detection or imaging system. Currently piezoelectric ultrasonic transducers dominate the …
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Evaluation of ceramic candle filters degradation and damage location using four-point bending tests
… the conventional acoustic emission or acoustic-ultrasonic detection capability. A virgin Refractron filter and twelve Schumacher filters which were previously tested under high pressure and high temperature at a demonstration power plant were evaluated. The acoustic signatures of the ceramic …
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Real time defect detection in welds by ultrasonic means
… system has been developed to detect weld defects ultrasonically whilst welding is in progress. This system, including a flash analogue to digital converter and built-in memories to store sampled data, a peak characters extractor and a welding process controller, enabled welding processes to be …
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Advancing Photoacoustic Imaging Technology with Compact Source, Fluorescence Co-registration, Spectral Encoding, Matrix Detection and FRET
… biomedical imaging modality that can provide 3D ultrasonically scalable images of biological tissue ranging from organelles to organs. Pure optical imaging modalities (e.g., optical coherence tomography and diffuse optical tomography) encounter a fundamental limitation of either penetration or …