Ultrasonic diagnostic apparatus
US6673020B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 9, 2001 |
| Grant date | Jan 6, 2004 |
| Priority date | — |
| Expiry date | Feb 9, 2021 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/1075
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
To accurately measure wave intensity as an evaluation value using an ultrasonic diagnostic apparatus, a measurement line is set in a tomogram and anterior and posterior walls of a blood vessel are tracked on the measurement line, so that a change waveform concerning a blood vessel diameter is prepared. A tracking gate S is set on the measurement line, so that a blood velocity change waveform is prepared based on echo data concerning a part within the tracking gate S, the change waveform indicating averaged blood velocity. Wave intensity is calculated based on the blood vessel diameter change waveform and the blood velocity change waveform. Prior to the calculation of wave intensity, the blood vessel diameter change waveform is calibrated based on the maximum and minimum blood pressure values into a blood pressure waveform. A beam for Doppler measurement may be set intersecting with the displacement measurement beam.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.