Measuring and testing – Vibration – By mechanical waves
Patent
1978-05-02
1980-04-15
Michell, Robert W.
Measuring and testing
Vibration
By mechanical waves
128660, 367 46, 367900, 367 87, G01N 2900
Patent
active
041977505
ABSTRACT:
The apparatus comprises an ultrasonic transducer for the purpose of scanning an examination subject, and an image display device for representation of the ultrasonic information signals in the form of a display image. In accordance with the illustrative disclosure, an arrangement of electric frequency filters is associated with the ultrasonic transducer, said frequency filters manifesting a frequency response which is essentially the inverse of the frequency response being imposed on the ultrasonic impulses by the attenuating examination subject in the ultrasonic-transmit path. The imaging apparatus finds application particularly in medical ultrasonic diagnosis.
REFERENCES:
patent: 3033029 (1962-05-01), Weighart
patent: 3076177 (1963-01-01), Lawrence et al.
patent: 3150327 (1964-09-01), Taylor
patent: 3162756 (1964-12-01), Lawrence
patent: 3287695 (1966-11-01), Taylor
patent: 3309914 (1967-03-01), Weighart
patent: 3805596 (1974-04-01), Klahr
patent: 4016750 (1977-04-01), Green
patent: 4057049 (1977-11-01), Hill
Wells, P. N. T., "Electronically Controlled Attenuators," in Physical Principles of Ultrasonic Diagnosis, Academic Press, London & N.Y., 1969, pp. 110-116.
Jaworski Francis J.
Michell Robert W.
Siemens Aktiengesellschaft
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