Ultrasonic diagnostic apparatus
US4252025A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 30, 1979 |
| Grant date | Feb 24, 1981 |
| Priority date | — |
| Expiry date | Jul 30, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S15/8995
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Apparatus for the ultrasonic examination of an object comprises: PA1 means for transmitting pulses of ultrasonic energy along a plurality of beams into the object and receiving echoes of the pulses reflected along the beams by acoustic impedance discontinuities within the object, the means directing the beams from a plurality of spaced positions in a single plane relative to the object and along a plurality of beam directions in the single plane at each spaced position; PA1 means for forming a first display of information representative of the position of acoustic impedance discontinuities within the object from the echoes received along the plurality of beams; PA1 means for selecting a point or region within the object intersected by at least one beam direction from different ones of the spaced positions; and PA1 means for determining the shift of echoes from the selected point or region received along the beam in each beam direction caused by divergences of the velocity of propagation of ultrasonic energy through the object in the respective beam direction from a median value, and correlating the determinations of the shift of echoes in each beam direction to obtain information r…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.