Results 251 to 260 of about 174,201 (277)
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Ultrasonic colour flow imaging
Physics in Medicine and Biology, 1994Real-time ultrasonic colour flow imaging, which was first demonstrated to be feasible only about a decade ago, has come into widespread clinical use. Ultrasound is scattered by ensembles of red blood cells. The ultrasonic frequency that gives the best signal-to-noise ratio for backscattering from blood depends on the required penetration. The frequency
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ULTRASONIC IMAGING APPARATUS AND METHOD FOR ULTRASONIC IMAGING
The Journal of the Acoustical Society of America, 2013A ultrasonic imaging apparatus comprises an ultrasonic probe including a plurality of ultrasonic transducers which perform ultrasonic transmission and reception to an object, a transceiver unit configured to obtain an ultrasonic signal from the object by driving the plurality of ultrasonic transducers, an ultrasonic data generation unit configured to ...
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The Journal of the Acoustical Society of America, 2011
An ultrasonic image boundary extracting apparatus capable of accurately extracting outlines of tissues based on reception signals respectively output from ultrasonic transducers by receiving ultrasonic echoes. The ultrasonic image boundary extracting apparatus includes: an analysis unit for obtaining an interrelationship among plural reception signals ...
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An ultrasonic image boundary extracting apparatus capable of accurately extracting outlines of tissues based on reception signals respectively output from ultrasonic transducers by receiving ultrasonic echoes. The ultrasonic image boundary extracting apparatus includes: an analysis unit for obtaining an interrelationship among plural reception signals ...
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The Journal of the Acoustical Society of America, 2006
In order to capture an ultrasonic image of high quality using ultrasound having a low sound pressure that does not break a contrast agent, scanning is performed during a pause period of intermittent scanning, using ultrasound that has a sound pressure insufficient to break the contrast agent and has undergone predetermined modulation; pulse compression
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In order to capture an ultrasonic image of high quality using ultrasound having a low sound pressure that does not break a contrast agent, scanning is performed during a pause period of intermittent scanning, using ultrasound that has a sound pressure insufficient to break the contrast agent and has undergone predetermined modulation; pulse compression
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Ultrasonic image generating apparatus and ultrasonic image generating method
The Journal of the Acoustical Society of America, 2004The ultrasonic image generating system has an ultrasonic beam output device which outputs a beam to a predetermined subject area, a receiving device which receives the reflected wave from the area, an image generating device which generates an image from the reflected wave and a beam output direction controller which performs control of changing the ...
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The Journal of the Acoustical Society of America, 1981
A portable ultrasonic scanning module is disclosed which includes a fluid-tight enclosure having a window at about the front thereof and a reflective scanner at about the rear thereof and generally facing the window. A transducer is mounted in the enclosure frontwardly of the reflective scanner with the ultrasound-emitting face of the transducer ...
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A portable ultrasonic scanning module is disclosed which includes a fluid-tight enclosure having a window at about the front thereof and a reflective scanner at about the rear thereof and generally facing the window. A transducer is mounted in the enclosure frontwardly of the reflective scanner with the ultrasound-emitting face of the transducer ...
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The Journal of the Acoustical Society of America, 2011
Disclosed are a system and method of selecting one or more operational parameters of an ultrasonic imaging system. In particular, methods and means are disclosed for automatically or semi-automatically determining a best operating frequency, or for determining whether a system should operate in a fundamental imaging mode or a harmonic imaging mode.
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Disclosed are a system and method of selecting one or more operational parameters of an ultrasonic imaging system. In particular, methods and means are disclosed for automatically or semi-automatically determining a best operating frequency, or for determining whether a system should operate in a fundamental imaging mode or a harmonic imaging mode.
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The Journal of the Acoustical Society of America, 1989
An ultrasonic imaging device includes an ultrasonic probe with a plurality of vibrators arranged linearly for transmitting ultrasonic beams to an object and receiving the reflected ultrasonic beams from the object. A driving unit is constructed to control the plurality of vibrators using a time control which employs delay lines to transmit ultrasonic ...
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An ultrasonic imaging device includes an ultrasonic probe with a plurality of vibrators arranged linearly for transmitting ultrasonic beams to an object and receiving the reflected ultrasonic beams from the object. A driving unit is constructed to control the plurality of vibrators using a time control which employs delay lines to transmit ultrasonic ...
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The Journal of the Acoustical Society of America, 1989
Ultrasonic imaging apparatus including ultrasonic transducers for emitting acoustic wave beams of various apertures, apparatus for directing two acoustic wave beams of substantially different focusing distances on the same beam direction, circuitry for receiving the reflected waves corresponding to the beam directions, apparatus for modulating the ...
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Ultrasonic imaging apparatus including ultrasonic transducers for emitting acoustic wave beams of various apertures, apparatus for directing two acoustic wave beams of substantially different focusing distances on the same beam direction, circuitry for receiving the reflected waves corresponding to the beam directions, apparatus for modulating the ...
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The Journal of the Acoustical Society of America, 1994
A phased array sector scanning ultrasonic imaging system produces simultaneously, and samples, three receive beams for each transmitted ultrasonic pulse directed upon flowing reflectors. Flow velocity is measured in the cross range direction using a correlation technique while flow velocity in the range direction is simultaneously measured using a ...
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A phased array sector scanning ultrasonic imaging system produces simultaneously, and samples, three receive beams for each transmitted ultrasonic pulse directed upon flowing reflectors. Flow velocity is measured in the cross range direction using a correlation technique while flow velocity in the range direction is simultaneously measured using a ...
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