Measuring and testing – Vibration – By mechanical waves
Patent
1978-08-24
1981-03-10
Michell, Robert W.
Measuring and testing
Vibration
By mechanical waves
128660, G01N 2900
Patent
active
042546621
ABSTRACT:
In an ultrasonic imaging system including an array of ultrasonic oscillators, ultrasonic beams are electronically scanned by sequentially selecting a plurality of oscillator sets for beam transmission and reception. For one transmission of ultrasonic waves, at least two receiver oscillator sets having at least some oscillators in common are simultaneously selected, and the respective outputs from the oscillators in the at least two receiver oscillator sets are phase-adjusted so that echoes received by the at least two receiver oscillator sets effectively correspond to echoes substantially emanating from at least two respective different points on a depth level distanced from the plane of the oscillator array by a predetermined depth, whereby at least two signals and hence at least two successive scan lines relating to the echoes from those respective different points are produced. As a result, improved line resolution and rapid line acquisition can be obtained.
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Ueda, M. et al., "Dynamic Focussing UTS Transducers Using Analog Switch Phase Shifters", Elec. & Comm. in Japan, vol. 58-A, No. 12, (1976, Dec.).
Katakura Kageyoshi
Kondo Toshio
Kuroda Masao
Ono Sekijyuro
Hitachi Medical Corporation
Jaworski Francis J.
Michell Robert W.
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