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pro vyhledávání: '"Lazar A. Shifrin"'
Autor:
Lazar A. Shifrin
Publikováno v:
SPIE Proceedings.
This paper presents a theoretical framework of a new time-domain method for estimating the slope of ultrasonic attenuation ((beta) ) in reflection. The proposed method has two main advantages: high accuracy and technical simplicity.© (1994) COPYRIGH
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::50de67082681a36410e8d1d7a9275dd9
https://doi.org/10.1117/12.174277
https://doi.org/10.1117/12.174277
Autor:
Lazar A. Shifrin
Publikováno v:
The Journal of the Acoustical Society of America. 130:3180
A low noise variable gain amplifier and method for processing received signals in an ultrasound medical imaging system is disclosed. Unlike solutions known from the prior art, the signals are amplified by a binary-coded gain amplifier having its ampl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4720406291dcf92e6e16332864034aab
https://doi.org/10.1121/1.3662381
https://doi.org/10.1121/1.3662381
Autor:
Lazar A. Shifrin
Publikováno v:
The Journal of the Acoustical Society of America. 117:1708
A digital-to-analog converter that outputs positive and negative portions of the desired bi-polar waveform as a representative unipolar waveform (e.g. absolute value of the bi-polar waveform) is connected to a switch. The switch selects between curre
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4683c4edf1a41f82407868e84a6b6459
https://doi.org/10.1121/1.1920057
https://doi.org/10.1121/1.1920057
Autor:
Lazar A. Shifrin
Publikováno v:
The Journal of the Acoustical Society of America. 115:964
A system and method of processing received signals in an ultrasound imaging system is disclosed. In the system, the received signals are amplified by means of a gain controlled amplifier, and the gain of the amplifier is varied, by varying the load c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1232770ea0254ad554282ba206c21372
https://doi.org/10.1121/1.1697805
https://doi.org/10.1121/1.1697805
Publikováno v:
The Journal of the Acoustical Society of America. 113:697
A three-state, pulse width modulated, bipolar waveform is constructed by summing a first component with an inverted, time-shifted version of the first component. By properly selecting the time interval for the time shift of the second component, freq
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bf909157e697e8c706d288517475601f
https://doi.org/10.1121/1.1560311
https://doi.org/10.1121/1.1560311
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