JPS5869545A - Ultrasonic diagnostic apparatus - Google Patents

Abstract

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

Description

[Detailed description of the invention] The present invention relates to an ultrasonic diagnostic apparatus.

Generally, ultrasound diagnostic equipment aims to diagnose the internal tissue structure of the human body by applying ultrasound waves from an ultrasound transducer called a probe to the human body and analyzing the reflected waves from the human body.
Among these, M-mode ultrasound diagnostic equipment displays the depth from the body surface of the examined area on the vertical axis and the movement of the examined area over time on the horizontal axis, and is used for cardiac diagnosis etc. There is.

By the way, the present applicant has proposed that in such an M-mode ultrasonic diagnostic apparatus, not only the M-mode display but also the M-mode
We have already filed an application for a device that has a margin extraction function that extracts characteristic lines from modal echocardiograms and can also quantify cardiac function parameters such as the size of each part of the heart (
(Japanese Patent Application No. 56-49828). However, the above-mentioned device is not capable of automatically determining the deviation value of the digitized cardiac function parameter from the standard value, and it is up to the doctor himself to determine whether the cardiac function parameter is within the normal range.

The present invention provides an ultrasonic diagnostic apparatus having the above-mentioned edge extraction function and the function of quantifying cardiac function parameters, in which an ultrasonic device that can automatically calculate the deviation of the above-mentioned numerical parameters from a standard value is provided. The purpose is to provide diagnostic equipment.

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows an ultrasonic diagnostic apparatus according to an embodiment of the present invention. In the figure, (1) is a probe that emits ultrasonic waves toward a human body, and (2) is a probe that emits ultrasonic waves from the human body that are received by this probe. (3) is an M-mode echocardiogram detection circuit that detects an M-mode echocardiogram from the reflected waves of
A margin extraction/digitization circuit extracts margins from the M-mode echocardiogram output from step 2) and digitizes cardiac function parameters, and (4) was obtained using this margin extraction/digitization circuit (3). A deviation calculation circuit that derives the deviation from the standard value of the two sets of cardiac function parameters, (5) is an M-mode echocardiogram obtained by the M-mode echocardiogram detection circuit (2) above, and a margin extraction/digitization circuit. The feature extraction line obtained in (3) is C1ζT
This display device also displays the deviation calculated by the deviation calculation circuit (4), and displays an abnormality alarm when the deviation value exceeds the normal range.

FIG. 2 shows an example of the configuration of the deviation calculation circuit (4), in which Vin is an analog input of the cardiac function parameter, Eroax and Emin are the upper and lower limit set values of the cardiac function parameter, (41 ) is a first differential amplifier that calculates the difference between the analog human power Vin and the upper limit set value Emax, (42) is a second differential amplifier that calculates the difference between the analog human power Vin and the lower limit set value Emin, (43
) is an inverter that inverts the output of the first differential amplifier (41), vInaX is the output of the inverter (43),
This indicates the upper limit deviation value, vrnax =V
in -Emax. Further, vmin is the output of the second differential amplifier (4), which indicates the lower limit deviation value, and vmin==Emin−V in .

Further, (44) is an OR circuit that uses the output of the inverter (43) and the output of the second differential amplifier (42), and when either of the two inputs is positive, the output Vout
Outputs a positive number.

Next, the operation will be explained.

In this device, when the probe (1) emits ultrasonic waves toward the human body, the ultrasonic waves are reflected by the human body and sent to the probe (1).
), and an M-mode echocardiogram is created from the reflected waves in the M-mode echocardiogram detection circuit (2).

Then, from this λ/l mode echocardiogram, margins are extracted in the margin extraction/digitization circuit (3) and cardiac function parameters are digitized, and the I4 mode echocardiogram is displayed on the display device (5). At the same time, a feature extraction line obtained by edge extraction is also displayed on the display device (5) superimposed on the echogram. Further, the deviation of the digitized cardiac function parameter from its standard value is calculated by the deviation calculation circuit (4), and the deviation value is displayed on the display device (5). When it is not within the range, an abnormality alarm is displayed on the display device (5).

Here, when the deviation calculation circuit (4) has a configuration as shown in Fig. 2, the analog human power Vin of the cardiac function parameter is set to the differential amplifier (41) (4a each with the two-limit setting value E).
The difference between max and lower limit set value Emin is taken, and the first
The output of the differential amplifier (41) is inverted by an inverter (4 groups), and the upper limit deviation vmax = V in −Ema
Deviation of x and lower limit ■m1n= Emin −V in
is required. And these painter difference values vmax, Vm
in is displayed on the display device (5), and if either of the painter's differences is positive, the output (+ut) becomes positive, and an abnormality alarm is displayed on the display device (5).

An example of a cardiac function parameter to be determined here is the end-diastolic short-axis diameter of the left ventricular lumen (the minimum value of the normal range, the standard value, and the maximum value of the normal range (the same applies hereinafter) are 40 and 50.5, respectively.
5Ilj), the end-systolic short-axis diameter of the left ventricular lumen (22, 32
, 44), contraction velocity of the left ventricular posterior wall (29, 47, 72
朋/s) etc.

Therefore, since the present device automatically calculates and displays the deviation value of the cardiac function parameter, even non-specialists can use the present device, and it can be used for screening in mass medical examinations and the like.

In the above embodiment, the deviation calculation circuit has been described as being constituted by a hardware circuit, but it may of course be realized by software arithmetic processing. Further, the deviation output may be typed out on a printer instead of being displayed as an image, and the abnormality alarm may be issued by a buzzer or other means instead of the display device.

As described above, according to the present invention, in an M-mode ultrasonic diagnostic apparatus that has a margin extraction function and is capable of quantifying cardiac function parameters, deviations of numerically expressed cardiac function parameters can be detected. Since a deviation calculation circuit is provided, the device can be used even by a nurse, even if the device is not a doctor, and can therefore be used for screening purposes such as mass medical examinations.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an ultrasonic diagnostic apparatus according to an embodiment of the present invention, and FIG. 2 is a block diagram of the deviation calculation circuit of FIG. 1. (1) Probe, (2) M-mode echocardiogram detection circuit, (3) Edge extraction/digitization circuit, (4) Deviation calculation circuit, (5) Display device (Abnormality alarm device). Agent Shin Kuzuno - (7) Figure 1 Figure 2

Claims (2)

[Claims] (1) A probe that emits ultrasonic waves toward a human body, an M-mode echocardiogram detection circuit that detects an M-mode echocardiogram from the waves reflected from the human body received by the probe, and this M-mode echocardiogram detection circuit. A margin extraction/digitization circuit extracts margins and digitizes cardiac function parameters from the output of the echogram detection circuit, and calculates the deviation from the standard value of the cardiac function parameters obtained by this margin extraction/digitization circuit. What is claimed is: 1. An ultrasonic diagnostic apparatus comprising: a deviation calculation circuit that calculates deviation values; and a display device that displays deviation values obtained by the circuit. (2) The ultrasonic diagnostic apparatus according to claim 1, further comprising an abnormality alarm device that issues an abnormality alarm when the deviation calculated by the deviation calculation circuit exceeds a normal range.