Passive ultrasound needle probe locator
US4431006A · kind A · utility
240Cited by
8References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 7, 1982 |
| Grant date | Feb 14, 1984 |
| Priority date | — |
| Expiry date | Jan 7, 2002 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2017/3413
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A solid steel stylet is carried coaxially within a hollow biopsy needle. The stylet carries a matching layer at its tip, such that when the needle and stylet are inserted into the body, ultrasound energy impinging on the needle tip is converted to pressure waves which are conveyed back up the stylet. An ultrasound transducer located outside the body is coupled to receive sonic energy from the stylet, and to convert it to electrical energy for coordination with, and superposition upon the image of the system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.