Vector Doppler system for stroke screening
US5738097A · kind A · utility
12Cited by
1References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 8, 1996 |
| Grant date | Apr 14, 1998 |
| Priority date | — |
| Expiry date | Nov 8, 2016 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B8/06
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A pulse Doppler system for determining blood flow velocity in a blood vessel in a body, in particular the carotid artery. A sample region covering a section of the artery is investigated, using two spaced transmitters, one with a frequency of 3 MHz and the other with a frequency of 4.5 MHz. The received echo beams are then processed to determine the component blood velocities for each frequency. The two component values are then resolved into a true blood flow velocity for the sample region. That information is used to produce a color-coded velocity map of the artery, which may be conveniently displayed to the operator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.