http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0323968-A4
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_bd70a66b63f6d3b9b8f4b9c8e5bc9b7c |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01S15-8984 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/A61B8-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01S15-588 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01F1-663 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01S15-582 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/A61B8-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01F1-66 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01S15-58 |
| filingDate | 1987-08-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_83375804523dc1085aa67a6ee0e3a407 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_948b7169bcdc51d7eb1e1876ca67581d |
| publicationDate | 1990-02-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | EP-0323968-A4 |
| titleOfInvention | METHOD AND APPARATUS FOR MEASURING BLOOD FLOW IN VOLUME. |
| abstract | A non-invasive ultrasonic volume blood measurement system includes a transducer probe assembly (10) having an inner and a concentric outer element (14, 16). Both are used to insonify a lumen area and to generate received signals representative of wide and narrow beams. The signals are processed simultaneously to produce respective Doppler power spectrums. Phase quadrature signals are generated for determining flow direction, and an AGC circuit (94) provides output signals controlling the amplitude of both spectrums for accurate computation of beam power ratio. A mean frequency estimator circuit (100) determines flow velocity at the lumen area, and a recording thereof is observed by the operator to ensure correct placement of the probe assembly (10) for insonifying a desired lumen area. Thereafter, a processing/controlling unit (22) determines volume blood flow by multiplying the determined flow velocity by the ratio of the obtained powers in the wide and narrow beams. |
| priorityDate | 1986-09-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 30.