Ultrasonic diagnostic apparatus
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United States of America Patent
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-
Jun 24, 1997
Grant Date -
N/A
app pub date -
Dec 8, 1994
filing date -
Feb 22, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
There is provided an ultrasonic diagnostic apparatus in which a plurality of piezoelectric transducers are arranged in a predetermined direction so as to transmit and receive ultrasonic waves to obtain a tomographic image on the inside of the subject. The ultrasonic diagnostic apparatus adopts such a scheme that a sector scan is electronically performed, and is capable of preventing deterioration of an image by reducing an influence of reflection of the ultrasonic waves from the ribs, and forming a good image improved in resolution. An intersection of scan lines at at least receiving end is set up between rib-to-rib which are located at the position deeper than the body surface of the subject. An aperture for transmitting and receiving of ultrasonic waves along the scan line of the central part of the sector configuration is wider than that along the scan line of the edge portion of the sector configuration.
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