JPS6373943A - Ultrasonic blood flow velocity profile diagnostic apparatus - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Summary] In an ultrasonic diagnostic apparatus equipped with a function of measuring a one-dimensional distribution (profile) of blood flow velocity in a living body, a circuit for controlling the display direction of the blood flow velocity profile; By providing means for applying a profile direction control signal to control the circuit, the velocity direction of the blood flow velocity profile is changed in accordance with the blood velocity direction that the operator imagines from the B-mode image. be.

[Industrial application field]

The present invention relates to an ultrasonic diagnostic apparatus having a function of measuring a blood flow velocity profile in a living body, and more particularly to a control method that allows the display of the measured blood flow velocity profile in the flow velocity direction to be reversed.

Ultrasonic diagnostic equipment equipped with a Doppler measurement function uses pulsed (4) Doppler measurement (measuring temporal changes in blood flow velocity in a specific beam direction and at a specific location (depth) in a B-mode image. ), continuous wave (or) Doppler measurement (measured by combining temporal changes in blood flow velocity at each depth in a specific beam direction of the B-mode image), and color Doppler measurement (measured by combining temporal changes in blood flow velocity at each depth in a specific beam direction of the B-mode image). There are measurement methods such as measuring the blood flow velocity distribution and displaying it in a different color for each velocity.

When diagnosing a living body using an ultrasonic diagnostic device, usually the color Doppler measurement described above is used to obtain an overall picture of the blood flow velocity distribution, and then the diagnosis is performed by performing pulsed Doppler measurement on a specific region. Because there is a problem with operability such as repeating pulsed Doppler measurement during color Doppler measurement, for example, the applicant has applied B.
A Doppler measurement method (see Japanese Patent Application No. 60-259459) that displays a one-dimensional distribution of blood flow velocity (referred to as a profile) in a specific beam direction of a mode image has been put into practical use.

However, until now, the display direction of the blood flow velocity profile has been fixed, and the operator can simultaneously
The direction of the blood flow velocity in the in-vivo organ that is the measurement target as imagined from the mode image may not always match, so a blood flow velocity profile diagnostic device that can flexibly control the display direction in the direction that the operator imagines is needed. I'm starting to be able to do it.

[Prior art and problems to be solved by the invention] FIG. 4 is a diagram explaining a conventional display method for blood velocity profile measurement, in which (a) shows an example of the configuration, and (b) shows a display method. An example is given.

First, the profile data analyzed by the blood flow velocity profile analyzer 1 based on the ultrasound reflection information is the blood flow velocity profile data for each depth direction within the blood vessel in the beam direction from the ultrasound probe set in the living body. The data is temporarily stored in the buffer memory 2 as flow velocity data (for example, blood flow velocity data in the bit direction and depth data in the word direction).

Here, the scan converter 4 converts the buffer memory 2
(the above-mentioned depth direction address and frequency direction (velocity direction) address) and the address of the display memory 3 are simultaneously generated by a specific function means, thereby generating the blood stored in the buffer memory 2. The flow velocity profile data is enlarged or reduced, stored in a display memory, and displayed on the display 5.

However, in the conventional method, the generation of addresses in the frequency direction for the buffer memory 2 is fixed, so when the blood flow velocity profile is displayed in the blood flow velocity profile table in the same direction, the solid line on the left side is This display method was used because it was easier to understand empirically by approaching the ultrasonic probe (TOWARD (indicated by T)).

However, with such a fixed display method, depending on the measurement site, the direction of blood flow velocity within a given organ in the living body may be opposite to what the operator imagines, making it difficult to understand. There was a problem.

SUMMARY OF THE INVENTION In view of the above-mentioned conventional drawbacks, it is an object of the present invention to provide a method for flexibly reversing the display direction of a blood flow velocity profile in accordance with each Doppler measurement method.

c. Means for Solving Problem] FIG. 1 is a diagram showing an example of the configuration of a blood flow velocity profile display control system of the present invention.

In the present invention, a buffer memory 2 that temporarily stores profile data from a blood velocity profile analyzer l and a scan converter 4 that simultaneously generates an address for a display memory 3 are provided on the output side in the frequency direction for the buffer memory 2. An inverter 6 that inverts the address (that is, speed direction), and a multiplexer (M
PX) 7 and the multiplexer (?'1PX)
The configuration is such that the output of 7 is used as an actual read address for the buffer memory 2.

[Effect]

That is, according to the present invention, in an ultrasonic diagnostic apparatus having a function of measuring a one-dimensional distribution (profile) of blood flow velocity in a living body, a circuit for controlling the display direction of the blood flow velocity profile; By providing a means for providing a profile direction control signal that controls the blood flow velocity, the blood flow velocity can be moved in the direction that corresponds to the direction that the operator imagines from the B-mode image.
Since the blood flow velocity profile is displayed, the blood flow velocity imagined by the operator can be matched with the blood flow direction in the profile, and Doppler measurement results can be displayed in reverse for ultrasonic diagnosis. It has the effect of allowing equipment to be constructed.

(Example〕 Embodiments of the present invention will be described in detail below with reference to the drawings.

The above-mentioned FIG. 1 is a diagram showing an example of the configuration of the blood flow velocity profile display control method of the present invention, and FIG. 2 is a block diagram showing the profile direction control signal input means of the present invention. FIG. 3 is a diagram showing an example of a profile display of the present invention, and the inverter 6 and multiplexer 0PX) 7 in FIG. 1 are necessary means to implement the present invention.

Note that the same reference numerals refer to the same objects throughout the plan.

Hereinafter, with reference to FIG. 1 and FIGS. 2 and 3, the display control method of the blood flow velocity profile direction of the present invention will be explained.

First, Fig. 2(a) shows the simplest control procedure, in which the central processing unit (C
The control information is input to the central processing unit (PU) 10.
U) This is a method in which the profile direction control signal explained in FIG. 1 above is output from 10 onwards.

In Figure 2(b), the operator uses the full keyboard (KB).
It follows the measurement site information input from 11, and generally,
The directions in which blood flow can be detected are limited to some extent, and when displaying a B-mode image for Doppler measurement, the above measurement site information is often input to record the direction from which the image is taken. .

Therefore, based on this measurement site information, the central processing unit (C
PU) 10 determines the most suitable profile display direction for the measurement site and generates the profile direction control signal.

FIG. 2(c) shows a blood flow velocity detector in the direction perpendicular to the beam of the ultrasonic beam emitted from the ultrasonic probe (for example, -1
Based on cross-correlation detection filed in Publication No. 00236)12
and 1 normal beam direction blood flow velocity detector (one point F
The central processing unit (CPII) 10 determines the direction display logic (a) shown in FIG. This is how it occurs.

In FIG. 3, (a) shows the profile display logic, and (b) shows the corresponding B-mode image, "
T(VARD) indicates the flow of blood in the direction of approaching the ultrasound probe.

The profile display logic shown in figure (a) above, for example,
The logic shown in the first quadrant is that if the blood flow velocity component (A) in the direction perpendicular to the beam is in the right direction, and the blood flow velocity component (B) in the beam direction is in the direction approaching the ultrasound probe. , the right side of the blood flow velocity profile display is the TOt4ARD mentioned above.
”.The following will be displayed in the same way.

As described above, the present invention enables the central processing unit (CPU) of the ultrasonic diagnostic apparatus to perform a The feature is that the direction of the blood flow velocity profile to be displayed on the display (whether to display it sideways or inverted) is determined by the blood flow velocity profile direction control signal.

〔Effect of the invention〕

As described above in detail, the ultrasonic blood flow velocity profile diagnostic device of the present invention is an ultrasonic diagnostic device having a function of measuring a one-dimensional distribution (profile) of blood flow velocity in a living body. A circuit for controlling the display direction of the flow velocity profile is provided, and by providing a profile direction control signal to control the circuit, the blood velocity direction can be set in a direction that matches the direction that the operator imagines from the B-mode image.
Since it is designed to display blood flow velocity profiles, it is possible to match the blood flow velocity direction that the operator imagines with respect to the blood flow flowing through internal organs in the living body to the blood flow velocity direction of the measured and displayed profile. This has the effect of making it possible to construct an ultrasonic diagnostic device capable of diagnosing a living body based on accurate blood flow.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an example of the configuration of a blood flow velocity profile direction display control method according to the present invention. FIG. 2 is a block diagram showing the profile direction control signal input means of the present invention. FIG. 3 is a diagram showing an example of profile display according to the present invention. FIG. 4 is a diagram illustrating a conventional display method for blood flow velocity profile measurement. It is. In the drawing, 1 is a blood flow velocity profile analyzer. 2 is buffer memory. 3 is display memory. 4 is a scan converter. 5 is the display. 6 is an inverter. 7 is a multiplexer (MPX). 10 is the central processing unit (CPU), and 11 is the full keyboard (KB). 12 is a blood flow velocity detector in the direction perpendicular to the beam. Engineering 3 is a one-point FFT blood flow velocity detector. are shown respectively. Control mark 7 Yurei (θ) Kiokuguchi month's brochu Yri L display, -rwo・] Measuring water scale diagram Fig. 3

Claims (2)

[Claims] (1) In an ultrasonic diagnostic apparatus that measures the one-dimensional distribution of blood flow velocity in a living body and displays a profile of the blood flow velocity on a display means with a line corresponding to a specific ultrasound beam as an axis, a control unit (10) that generates a profile direction control signal that specifies the direction of blood flow velocity profile display; and a control unit (10) that inverts the display direction of the one-dimensional blood flow velocity distribution about a line corresponding to the ultrasound beam. An ultrasonic blood flow velocity profile diagnostic apparatus comprising: a circuit (6, 7); and the inversion circuit (6, 7) is controlled by the blood velocity profile direction control signal. (2) The profile direction control signal is transmitted to the control device (1
0), the blood flow velocity (A) in the direction perpendicular to the beam, and
The ultrasonic blood flow velocity profile diagnostic device according to claim 1, wherein the ultrasonic blood flow velocity profile is generated based on the beam direction blood velocity (B).