Ultrasonic transducers for medical diagnostic imaging
نویسندگان
چکیده
منابع مشابه
Capacitive micromachined ultrasonic transducers for medical imaging and therapy.
Capacitive micromachined ultrasonic transducers (CMUTs) have been subject to extensive research for the last two decades. Although they were initially developed for air-coupled applications, today their main application space is medical imaging and therapy. This paper first presents a brief description of CMUTs, their basic structure, and operating principles. Our progression of developing seve...
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dynamic ranges in excess of 100 dB are attainable in pulseecho operation using commercially available discrete mmponents. Transmission experiments through aluminum and composite plates verify more than 100 dB dynamic range and demonstrate the ability of cMUTs to image defects in air at 2.5 MHz. W e also present a variation on cMUT design which improves the useful bandwidth of the device, permit...
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Singulation of MEMS is a critical step in the transition from wafer-level to die-level devices. As is the case for capacitive micromachined ultrasound transducer (CMUT) ring arrays, an ideal singulation must protect the fragile membranes from the processing environment while maintaining a ring array geometry. The singulation process presented in this paper involves bonding a trench-patterned CM...
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A capacitive micromachined ultrasonic transducer structure for use in underwater imaging is designed, fabricated and tested in this paper. In this structure, a silicon dioxide insulation layer is inserted between the top electrodes and the vibration membrane to prevent ohmic contact. The capacitance-voltage (C-V) characteristic curve shows that the transducer offers suitable levels of hysteresi...
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Interface Electronics for Ultrasonic Transducers by Hao-Yen Tang Doctor of Philosophy in Engineering Electrical Engineering and Computer Sciences University of California, Berkeley Professor Bernhard E. Boser, Chair Ultrasound has long been used for medical imaging. Recent advances of miniaturized MEMS ultrasonic transducers new applications such as gesture recognition, personal fitness devices...
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ژورنال
عنوان ژورنال: Biomedical Engineering Letters
سال: 2017
ISSN: 2093-9868,2093-985X
DOI: 10.1007/s13534-017-0021-8