Ultrasonic diagnostic apparatuses and methods therefor
US5511423A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 11, 1994 |
| Grant date | Apr 30, 1996 |
| Priority date | — |
| Expiry date | Jul 11, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S7/52063
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An ultrasonic diagnostic apparatus which improves the bearing resolution by dynamically changing the weighting performed on the amplitude of transmitted ultrasonic waves and/or a received wave signal. This weighting is changed with reference to the magnitude of the received wave signal. The resolution in the bearing direction is improved by increasing the wave number of the ultrasonic wave to be transmitted and by weighting the ultrasonic wave, whereas the resolution in the distance direction is prevented from being degraded as much as possible, thus making the bearing resolution substantially equal to the distance resolution. Since controlling the wave number is comparable to control of a frequency band, similar effects can also be produced by combining the control of the frequency band of a received wave signal with the weighting.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.