Results 241 to 250 of about 173,652 (295)

Ultrasonic scatterer, ultrasonic imaging method and ultrasonic imaging apparatus

The Journal of the Acoustical Society of America, 2008
The ultrasonic scatterer of the invention comprises gas-containing particles having an average particle size of 0.01 μm to 10 μm, the ultrasonic imaging method of the invention comprises transmitting an ultrasonic wave continuing for ten cycles or more; transmitting an ultrasonic wave continuing for four cycles or more and less than ten cycles after a ...
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Ultrasonic imaging of neoplasms

Cancer, 1976
Reflected ultrasound scanning (echography) is rapidly developing into a prime tool for tumor diagnosis, outlining, and detection. The principles of echographic diagnosis of neoplasms, the accepted uses in detection and diagnosis, as well as some of the principles of internal and contour patterns are discussed.
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Noise in ultrasonic imaging

Ultrasonics, 1980
The feasibility of noise measurement in medical ultrasonic imaging has been studied and a theoretical evaluation of stochastic noise influence upon the perceived image has been undertaken. The influence of noise on a perceived image has been calculated by considering the light intensity perception characteristic of the human eye and it has been found ...
Viculin, Tomislav, Vojnović, Božidar, Breyer, Branko   +2 more
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Ultrasonic imaging method and ultrasonic imaging apparatus

The Journal of the Acoustical Society of America, 2004
Since a number of ultrasonic beams which are transmitted within unit time is increased, an ultrasonic imaging method is capable of obtaining image information in a high frame rate or improving resolution of the image information. In an ultrasonic imaging method of transmitting an ultrasonic beam toward a measurement target located within an object ...
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Digitization of Ultrasonic Images

Radiology, 1970
Abstract The authors describe a method for digitizing diagnostic ultrasonic data using a system originally constructed for use with radioisotope scan data. A commercial ultrasonic unit drives the transducer and amplifies the preliminary echo signal. The output signals from the ultrasonic unit are fed to a programmable digital logic interface coupled to
J J, Erickson, A B, Brill
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Ultrasonic Reflex Transmission Imaging

Ultrasonic Imaging, 1985
Reflex Transmission Imaging (RTI) is a new imaging method by which orthographic transmission images can be made using augmented B-mode equipment. Conventional transmission imaging requires acoustic coupling to large areas on both sides of the body, whereas RTI can be performed from one side with a single, small transducer probe.
P S, Green, M, Arditi
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Ultrasonic Transmission Speckle Imaging

Ultrasonic Imaging, 1981
Speckle interferometry, as developed during the past decade for optical astronomy, is adapted to ultrasonic imaging through water and animal tissue. Experimental results are presented illustrating not only Labeyrie's original idea, but also speckle holography and our recently devised shift-and-add technique. Both incoherent and coherent processing are
R H, Bates, B S, Robinson
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Ultrasonic Imaging Using Optoelectronic Transmitters

Ultrasonic Imaging, 1998
Conventional ultrasound scanners utilize electronic transmitters and receivers at the scanner with a separate coaxial cable connected to each transducer element in the handle. The number of transducer elements determines the size and weight of the transducer cable assembly that connects the imaging array to the scanner.
C D, Emery, H C, Casey, S W, Smith
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Ultrasonic colour flow imaging

Physics in Medicine and Biology, 1994
Real-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, 2013
A 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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