US5158070A
Expired / Lapsed
US
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Method for the localized destruction of soft structures using negative pressure elastic waves
Assignee: EDAP International SA
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Filing: 1990-07-18
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Granted: 1992-10-27
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Expires: 2010-07-18
Abstract
Abstract The method for the localized destruction of soft structures using negative pressure elastic waves, comprises the steps of generating at a predetermined rate comprised between a few Hz and 3 KHz, trains of elastic pressure waves, said waves having a frequency between 0.3 and 10 MHz, each of said trains having a duration between 1 microsecond and 1 millisecond and comprising negative going oscillations; focussing said waves into a beam; transmitting and directing said beam onto the target through a liquid coupling medium and adjusting the power of said elastic pressure wave at a predetermined value.
Inventors
- 👤 Jacques Dory
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:56
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/22; A61B17/225; A61B17/2256; A61B17/2258; A61B17/22004; A61N; A61N7/00; A61B2017/00017; A61B2017/00137; A61B2017/00154; A61B2017/00159; A61B2017/00163
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
100 words
A method for the localized destruction of a target having a soft structure, comprising the steps of: i) generating, at a predetermined rate, trains of elastic pressure waves, said waves having a frequency between 3.0 and 10 MHz, each of said trains having a duration between 1 microsecond and 1 millisecond and comprising negative going oscillations; ii) focussing said waves into a beam; iii) transmitting and directing said beam onto the target and iv) adjusting the power of said trains of elastic pressure waves to a particular value which allows reflected energy from said target to be displayed as echoes.
Claim 2
Independent Claim
100 words
A method for the localized destruction of a target having a soft structure, comprising the steps of: i) generating, at a predetermined rate, trains of elastic pressure waves, said waves having a frequency between 3.0 and 10 MHz, each of said trains having a duration between 1 microsecond and 1 millisecond and comprising negative going oscillations; ii) focussing said waves into a beam; iii) transmitting and directing said beam onto the target and iv) adjusting the power of said trains of elastic pressure waves to a particular value which allows reflected energy from said target to be displayed as echoes.
Claim 3
Dependent Claim
29 words
The method as claimed in claim 1, wherein said oscillations comprise positive and negative peaks, the negative peaks having an amplitude substantially larger than that of the positive peaks.
Claim 4
Dependent Claim
69 words
The method as claimed in claim 1, wherein step iv) comprises: iv-a) adjusting said power at a first value substantially lower than said particular value; iv-b) receiving the energy of the elastic pressure waves reflected from the target and displaying echoes from the reflected energy; iv-c) increasing the power until a threshold is reached for which the displayed echoes disappear and iv-d) adjusting the power short of said threshold.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-10-27 | 1996-04-27 | 1996-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-10-27 | 2000-04-27 | 2000-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-10-27 | 2004-04-27 | 2004-10-27 | $7700.00 | Window Closed / Lapsed |