Results 251 to 260 of about 132,248 (302)
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Journal of Diagnostic Medical Sonography, 2015
Diagnostic medical ultrasound transducers have evolved through the years and have contributed significantly to improved patient care. This article discusses the history and types of transducers and the elements that have changed over time. There has been a sharp transition from natural to human-made elements and from one to many in a single transducer.
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Diagnostic medical ultrasound transducers have evolved through the years and have contributed significantly to improved patient care. This article discusses the history and types of transducers and the elements that have changed over time. There has been a sharp transition from natural to human-made elements and from one to many in a single transducer.
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Transducers in medical ultrasound. Part 4: transducer safety
Ultrasonics, 1986Transducer safety encompasses a wide spectrum of topics. It may range from mechanical construction reliability to biological effects created by ultrasound radiation. In this Paper the electrical and acoustical safety aspects are summarized and initial experience with sterilization of echocardiographic transducers for peroperative cardiac scanning is ...
P N, Wells, N, de Jong, N, Bom, J, Somer
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Focussing ultrasound transducer
The Journal of the Acoustical Society of America, 1991A focussing transducer for the destruction of objects internal to a patient's body by pulses of ultrasonic waves. The transducer comprises a concave transducer surface which is divided into areas and there is a control means which can selectively activate the areas of the transducer so that the waveform arriving at the focus can adjusted.
Helmut Wurster, Werner Krauss
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Miniature ultrasound transducer
The Journal of the Acoustical Society of America, 2004An ultrasonic transducer (108) for use in medical imaging comprises a substrate (300) having first and second surfaces. The substrate (300) includes an aperture (301) extending from the first surface to the second surface. Electronic circuitry (302) is located on the first surface. A diaphragm (304) is positioned at least partially within the aperture (
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Flexible Ultrasound Transducer Array
The Journal of the Acoustical Society of America, 2011A transducer array includes two or more sub-arrays that move relative to each other. Position sensors on each of the sub-arrays provide spatial coordination for beamforming and/or image forming to yield extended field of view and high image resolution. The adaptable transducer array, such as mounted on a flexible transducer housing, allows the array to
Jian-Hua Mo, Xuan-Ming Lu
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All-optical ultrasound transducer
SPIE Proceedings, 2007Recent advances in fabrication techniques have accelerated development of optical generation and detection of ultrasound, a promising technology to construct high-frequency arrays for high resolution ultrasound imaging. A two-dimensional (2-D) gold nanostructure has been fabricated to optically generate high frequency ultrasound.
Y. Hou +5 more
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Expandable ultrasound transducer array
The Journal of the Acoustical Society of America, 2009A foldable transducer array is unfolded or deployed for use, providing a larger radiating surface. While folded, the transducer array has a smaller width or volume for insertion into and withdrawal from the patient.
Walter T. Wilser, John Paul Mohr
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The Journal of the Acoustical Society of America, 2003
By bonding a conductive first matching layer 14 to the acoustic radiation surface side, which is the bottom side, of a belt-shape piezoelectric element on both faces with electrodes provided, and using a dicing machine to form divided grooves 16 , an array of piezoelectric elements 6, 6, . . . , 6 is formed in the element array direction.
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By bonding a conductive first matching layer 14 to the acoustic radiation surface side, which is the bottom side, of a belt-shape piezoelectric element on both faces with electrodes provided, and using a dicing machine to form divided grooves 16 , an array of piezoelectric elements 6, 6, . . . , 6 is formed in the element array direction.
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2006
Abstract The history of transducer development for medical imaging and therapeutic applications is closely coupled with the invention of transduction mechanisms and the development of transducer materials. Six transduction mechanisms can be identified as originating in the 19th century: Electromagnetic: In the presence of a static or ...
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Abstract The history of transducer development for medical imaging and therapeutic applications is closely coupled with the invention of transduction mechanisms and the development of transducer materials. Six transduction mechanisms can be identified as originating in the 19th century: Electromagnetic: In the presence of a static or ...
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The Journal of the Acoustical Society of America, 2006
A miniaturized ultrasound transducer (e.g. less than 4 mm×4 mm×10 mm) is provided and is operable in small spaces, such as within a surgical field and placed upon, within, attached to, embedded within, etc. structures, organs or devices. The ultrasound transducer may be mounted onto or incorporated into a holding device to foster easily manipulation of
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A miniaturized ultrasound transducer (e.g. less than 4 mm×4 mm×10 mm) is provided and is operable in small spaces, such as within a surgical field and placed upon, within, attached to, embedded within, etc. structures, organs or devices. The ultrasound transducer may be mounted onto or incorporated into a holding device to foster easily manipulation of
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