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 “"Transducer arrays"”.
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Multiplexer Design for a Multi-Array Ultrasonic Imaging System
… be directly interfaced with multiple ultrasound transducer arrays. A high-voltage multiplexer is designed to allow a 128-signal DAQ to interface with up to eighteen 128-signal arrays in a time-multiplexed manner. The multiplexer is then implemented as part of a novel conformable multi-array …
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Fabrication of Ultrasound Transducers and Arrays Integrated within Needles for Imaging Guidance and Diagnosis
… the use of a biopsy needle with an integrated transducer that is capable of minimally invasive and high-resolution ultrasound imaging is proposed. Such a design would overcome the compromise between resolution and penetration depth which is associated with the use of a probe on the skins …
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Methods to Investigate Hyperthermia Induced By Tumor Treating Fields
… of alternating electric fields using insulated transducer arrays placed directly on the skin in the region surrounding the tumor. TTF’s is a non-invasive application of low-intensity (1-3 V/cm), intermediate-frequency (100-500 kHz) alternating electric fields. The predominant mechanism by which …
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Development of Electronic Systems for Ultrasonic Particle Manipulation
… acoustic fields generated by ultrasound arrays for trapping individual particles and groups of particles at length scales from hundreds of µm to a few mm.<br/><br/>This thesis explores and demonstrates particle trapping and manipulation with electronically-controlled miniaturized …
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Piezoelectric single crystal based one-dimensional phased array for breast tissue imaging
… and operator-dependent. Replacing rigid transducers with conformable ultrasound transducer arrays can allow image acquisition on curved body parts, improve image quality, and enable functions such as long-term monitoring. In this thesis, I propose a conformable ultrasound breast patch …
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Development of Ultrasonic Devices for Microparticle and Cell Manipulation
… with high frequency (> 20 MHz) ultrasonic transducers for the investigation of biological cells and complex ultrasonic transducer array systems to explore the feasibility of electronically controlled 2-D and 3-D manipulation. Piezoelectric and passive materials, fabrication techniques, …
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Photoacoustic Microscopy and Photoacoustic Computed Tomography Using High-frequency Linear Array Ultrasonic Transducers
… optical illumination and an ultrasonic transducer array, significantly increasing the imaging speed. We present a reflection-mode 1D multifocal OR-PAM system based on a 1D microlens array that provides multiple foci as well as an ultrasonic transducer array that receives the excited …