Title:
ULTRASONIC DIAGNOSTIC APPARATUS
Document Type and Number:
Japanese Patent JP3652791
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To reduce errors accompanying a heartbeat by equipping a large amplitude motion analyzing means to track the large amplitude displacement motion of an object based on a heartbeat and a micro-vibration analyzing means to obtain a motion speed waveform of micro-vibration overlapped on the large amplitude displacement motion of the object.
SOLUTION: Ultrasonic waves are irradiated with an ultrasonic transducer 1 toward a body inside from a chest surface and the reflection waves reflected by a heart wall 3 are received by the transducer 1. Ultrasonic signals of the reflected waves are amplified by an amplifier 4 and detected by an orthogonal demodulator 5 and converted by an A/D converter 6 to digital data, and then inputted into a data analyzing processor 7. At the data analyzing processor 7, the instantaneous position of an object is determined using the amplitude and the phase of the detected signals and the large amplitude displacement motion of the object based on the heartbeat is precisely tracked and the motion speed wave form of micro-vibration overlapped on the large amplitude displacement motion of the object is obtained based on the order position of the large amplitude displacement motion of the object.
Inventors:
Nakabachi Noriyoshi
Hiroshi Kanai
Yoshiro Koiwa
Hiroshi Kanai
Yoshiro Koiwa
Application Number:
JP16341896A
Publication Date:
May 25, 2005
Filing Date:
June 24, 1996
Export Citation:
Assignee:
Japan Science and Technology Agency
International Classes:
A61B8/08; G01S15/58; (IPC1-7): A61B8/08
Domestic Patent References:
| JP7079971A | ||||
| JP4150841A | ||||
| JP62266040A |
Other References:
金井浩他,心臓壁振動の非侵襲的計測とその応用,日本音響学会平成8年度春季研究発表会講演論文集=II=,日本,1996年 3月26日,第903-904頁
Attorney, Agent or Firm:
Fumihiro Hasegawa
Akihiko Watanabe
Akihiko Watanabe