Ultrasonic imaging method and apparatus for generating pulse width modulated waveforms with reduced harmonic response
US5833614A · kind A · utility
86Cited by
39References
30Claims
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Key dates
| Filing date | Jul 15, 1997 |
| Grant date | Nov 10, 1998 |
| Priority date | — |
| Expiry date | Jul 15, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S15/8915
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An improvement to the method for harmonic imaging including the steps of (a) transmitting ultrasonic energy at a fundamental frequency and (b) receiving reflected ultrasonic energy at a harmonic of the fundamental frequency is provided. The transmitting step includes the step of transmitting a waveform comprising at least a sequence of at least a first and second pulse characterized by first and second pulse durations, respectively, where the second pulse duration is different than the first duration. This arrangement can reduce harmonic energy in the waveform.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.