Title:
超音波診断装置
Document Type and Number:
Japanese Patent JP6829656
Kind Code:
B2
Abstract:
To accurately measure a flow velocity even if the position of a blood vessel is deviated from the center of a sample gate.SOLUTION: A setting part sets a sample gate to an object tissue. A pulse-Doppler measurement part receives a reception signal acquired by repeatedly transmitting an ultrasonic pulse to the object tissue and receiving the reflection wave, extracts a reception signal from the object tissue in the sample gate, and repeats an operation to extract the temporal change in a time axial direction by a predetermined time gate and execute frequency analysis, thereby obtaining a temporal change in a Doppler shift frequency. At this time, the pulse-Doppler measurement part divides the sample gate into a plurality of divided gates in a depth direction of the object tissue and extracts a signal in the divided gates from the reception signal for each of the divided gates. The temporal change is extracted in a time axial direction by a predetermined time gate and is subjected to frequency analysis so as to obtain a temporal change waveform of the Doppler shift frequency.SELECTED DRAWING: Figure 2
Inventors:
Yoshiyuki Kobayashi
Application Number:
JP2017115158A
Publication Date:
February 10, 2021
Filing Date:
June 12, 2017
Export Citation:
Assignee:
株式会社日立製作所
International Classes:
A61B8/06
Domestic Patent References:
| JP4051941A | ||||
| JP3198839A | ||||
| JP2017093813A | ||||
| JP10165400A | ||||
| JP2013118984A | ||||
| JP2182246A | ||||
| JP2001218768A |
Foreign References:
| US5724974 | ||||
| US20130150717 |
Attorney, Agent or Firm:
Patent Business Corporation Sannozaka Patent Office