Title:
PERFUSION PARAMETER MEASURING METHOD, PERFUSION IMAGE GENERATING METHOD AND ULTRASONOGRAPH
Document Type and Number:
Japanese Patent JP3712510
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To precisely measure a parameter expressing the degree of the activity of perfusion by destroying bubbles with the measurement of signal intensity in a state where the bubbles exist and then measuring the signal intensity of ultrasonic echo from a measuring point, thereby obtaining the shortest time satisfying a specific inequality.
SOLUTION: A PD mode processing part 5 generating picture data based on the power of the doppler component of ultrasonic echo is provided and a central processing part 6 generates a display picture according to obtained picture data. At this time, the signal intensity gk of ultrasonic echo is measured in a state where the bubbles as a contrast medium sufficiently exists at a measuring point in an examinee body and bubbles is destroyed by ultrasonic beam transmitted for measuring. Next, the signal intensity gk+ of ultrasonic echo from the measuring point is measured again after the lapse of a time Tk to obtain a shortest time Tkmin meeting the equality of gk+>w.gk when a comparing coefficient (w) is made 0<w<1. Then, the parameter expressing the degree of the activity of perfusion is decided based on the shortest time.
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Inventors:
Lee Taobao
Application Number:
JP25959897A
Publication Date:
November 02, 2005
Filing Date:
September 25, 1997
Export Citation:
Assignee:
GE Yokogawa Medical System Co., Ltd.
International Classes:
A61B8/06; G01S15/89; (IPC1-7): A61B8/06
Domestic Patent References:
| JP7178095A | ||||
| JP8196537A | ||||
| JP8336527A | ||||
| JP9164138A |
Attorney, Agent or Firm:
Ari Chika Genshiro