Blood flow measuring apparatus

• US 4,787,395 A
• Filed: 02/06/1986
• Issued: 11/29/1988
• Est. Priority Date: 02/08/1985
• Status: Expired due to Term

• Current Assignee: Fukuda Denshi Company Limited
• Original Assignee: Fujitsu Limited
• Inventors: Yanashima, Tadahiko, Watanabe, Ikuo, Amemiya, Shinichi, Miwa, Hirohide
• Primary Examiner(s): Jaworski, Francis J.
• Application Number:
  US06/826,704
• Time in Patent Office: 1,027 Days
• Field of Search: 128/660, 128/661, 128/663, 73/861.75
• US Class Current: 600/455
• CPC Class Codes: A61B 8/06 Measuring blood flow measuring volume flow in general G01F, e.g. G01F1/66, G01F1/72; measuring speed of fluids in general G01P5/00
• CPC Class Codes: A61B 8/486 involving arbitrary m-mode
• CPC Class Codes: G01S 15/8979 Combined Doppler and pulse-echo imaging systems
• CPC Class Codes: G01S 7/52074 Composite displays, e.g. split-screen displays; Combination of multiple images or of images and alphanumeric tabular information

Abstract

A blood flow measuring apparatus provides a two-dimensional blood stream flow velocity distribution diagram which displays a two-dimensional blood stream flow velocity distribution in a region of a living body to be examined and a one-dimensional blood stream flow velocity distribution diagram which displays a one-dimensional blood stream flow velocity distribution in a linear region specified by a line on the examined region with a measuring condition different from the measurement of the two-dimensional blood stream flow velocity distribution. In the present invention, the two-dimensional blood stream flow velocity diagram and the one-dimensional blood stream flow velocity diagram are simultaneously displayed in such a manner that the corresponding portions can be clearly read, and thus the blood stream flow velocity in each portion can be correctly and easily determined.

Claims

1. An improved ultrasound blood flow measuring apparatus which includes a first means for measuring in real time a two-dimensional blood sream flow velocity distribution in a region in a living body by transmission and reception of ultrasonic waves along a plurality of scanning lines and providing data representative thereof, and a second means for measuring a one-dimensional blood stream flow velocity distribution of a linear region along a predetermined line from among said scanning lines in said living body region by transmission and reception of ultrasonic waves ad providing data representative thereof;

the improvement comprising;

means for simultaneously displaying on a single display screen said one-dimensional and said two-dimensional blood stream data,

cursor means for displaying said predetermined line superposed on said living body region data,

wherein said second means includes a processor means and a memory means, said processor means for writing blood stream flow velocity information derived from the reception of ultrasonic waves into a picture memory as said one-dimensional flow representative data, and

said second means being adapted to measure said one-dimensional blood stream flow velocity distribution along said predetermined line for a first number of times per scan, said first means being adapted to measure said two-dimensional blood stream velocity distribution for a second number of times per scan line of said distribution, per scan, said first number being larger than said second number.

2. A blood flow measuring apparatus according to claim 1, further comprising means for alternately operating measurements of said first means and said second means in a time-divisional manner.

3. A blood flow measuring apparatus according to claim 1, further comprising a detecting means for detecting a specified value from any output of said second means for each living body region, and for displaying said output of said second means detected by said detecting means.

4. A blood flow measuring apparatus according to claim 1, further comprising means for displaying an output of said second means as a change of a one-dimensional blood stream flow velocity distribution on a time axis or as superimposed on a displayed picture, by a variation in brightness or a color change.

5. A blood flow measuring apparatus according to claim 1, further comprising means for displaying a B mode diagram superimposed on a two-dimensional blood stream flow velocity distribution diagram.