Dual frequency ultrasound transducer including an ultrahigh frequency transducer stack and a low frequency ultrasound transducer stack
US11465176B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 22, 2020 |
| Grant date | Oct 11, 2022 |
| Priority date | — |
| Expiry date | Oct 31, 2040 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB06B1/0688
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A dual frequency ultrasound transducer includes a high frequency ultrasound array and a low frequency transducer positioned behind or proximal to the high frequency ultrasound array. In one embodiment, a dampening material is positioned between a rear surface of the high frequency array and the a front surface of the low frequency array. The dampening preferably is high absorbing of signals at the frequency of the high frequency array but passes signals at the frequency of the low frequency transducer with little attenuation. In additional, or alternatively, the low frequency can angled with respect to the plane of the high frequency transducer to reduce inter-stack multipath reflections. Beamforming delays compensate for the differences in physical distances between the elements of the low frequency transducer and the plane of the high frequency transducer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.