Ultrasonic blood flow measuring apparatus
US4416286A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 6, 1981 |
| Grant date | Nov 22, 1983 |
| Priority date | — |
| Expiry date | Feb 6, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2291/02836
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An ultrasonic blood flow measuring apparatus comprising: PA1 an ultrasonic probe for transmitting an ultrasonic beam into a tissue under examination in response to an electrical driving pulse and for receiving an ultrasonic echo reflected from the tissue to convert the same into an electrical signal; PA1 a pulse generator arrangement for generating the electrical driving pulse of said probe; PA1 a detector circuit for detecting a tomogram signal from the electrical signal; PA1 a Doppler signal processing circuit for extracting Doppler frequency shift components due to velocity of a blood flow in the tissue from the electrical signal; PA1 a marker signal generator for generating marker signals indicative of a location where velocity of the blood flow is measured and a direction of the ultrasonic beam which contains the Doppler frequency shift components; PA1 an arithmetic circuit for calculating an angle .theta. defined between a direction of the blood flow and the direction of the ultrasonic beam which contains the Doppler frequency shift components; PA1 a divider circuit for obtaining the velocity of the blood flow in accordance with the Doppler frequency shift components and the …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.