Lithotripsy system using ultrasound to locate calculi
US5067493A · kind A · utility
6Cited by
11References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 11, 1990 |
| Grant date | Nov 26, 1991 |
| Priority date | — |
| Expiry date | Jul 11, 2010 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B17/2256
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A calculi locator is provided having at least one ultrasound transducers in combination with a shock wave generator. The ultrasound transducer is rotatable about the longitudinal axis of a reflector of the shock wave generator. The shock wave generator includes a target focal point. The transducer is used to assure positional coincidence of the true location of the calculi and of the target focal point. Alternatively, either a mathematical correction unit is used or iterative measurements are used to correct for refraction errors in the location of the imaged calculi.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.