Ultrasonic beamforming with improved signal-to-noise ratio using orthogonal complementary sets
US6113545A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 11, 1999 |
| Grant date | Sep 5, 2000 |
| Priority date | — |
| Expiry date | Jan 11, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S15/8959
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Signal-to-noise ratio in medical ultrasound imaging is improved by using Golay-encoded excitation of a transducer array. Two orthogonal Golay pairs of sequences are transmitted to respective transmit focal zones. Start of transmission of the Golay pair to the second zone is delayed until shortly after the start of transmission of the Golay pair to the first transmit focal zone such that the two pairs of firings are overlapped in time. The receive filtering follows two parallel paths, one for each focal zone. Each decoding filter (also used for bandpass filtering) supplies its output signal to a vector summer, the output signal of which is multiplexed to conventional B-mode processing (envelope detection, logarithmic compression and edge-enhancement filter), followed by scan conversion for display.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.