Ultrasonic imaging of biopsy needle
US5095910A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 18, 1990 |
| Grant date | Mar 17, 1992 |
| Priority date | — |
| Expiry date | Apr 18, 2010 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2090/3929
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A system for imaging a biopsy needle with ultrasound is shown in which the needle tip elicits a Doppler response through controlled reciprocation of the needle tip. In a preferred embodiment the biopsy needle includes a hollow cannula which carries a removable stylet. Means for reciprocating the stylet is coupled to the proximal end of the stylet, and the distal tip of the stylet is reciprocated at the distal end of the cannula. This motion is detected through Doppler interrogation of the body region at which the biopsy is to be performed, and the Doppler response of the needle tip in the image of the body region allows the needle tip to be monitored as it approaches the tissue to be biopsied.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.