JPS5991949A - M-mode 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 M-mode ultrasonic diagnostic apparatus.

Generally, ultrasound diagnostic equipment aims to diagnose the internal tissue structure of the human body by applying ultrasound waves to the human body from an ultrasonic transducer called a probe and analyzing the reflected waves from the human body.
Among them, M-mode ultrasound diagnostic equipment measures the depth from the surface of the human body on the vertical axis and time on the horizontal axis, and measures temporal changes in each part of the human body, that is, the state of movement of each part, using CRT. This display waveform is especially used as an M-mode echocardiogram for diagnostic observation of cardiac function.
Information on the end systole (hereinafter abbreviated as ED) and end systole (hereinafter abbreviated as ES) is particularly useful information in the diagnostic observation of the cardiac function.

In the figure, it is generally known that the wave corresponds to the second heart sound that appears next to the first heart sound that corresponds to the wave in the electrocardiogram.

Therefore, conventionally, when diagnosing and observing the ED and ES information of an M-mode echocardiogram, the echocardiogram, phonocardiogram, and electrocardiogram are displayed on the same CRT with their time phases synchronized, and the electrocardiogram as described above is displayed on the same CRT. The characteristic waveforms of ED and ES in a phonocardiogram were used to be visually observed by a specialist observer for diagnostic observation.

Figure 1 shows an image displayed on a CRT when diagnosing and observing ED and ES in an M-mode echocardiogram using such a conventional device. Figure B#i is a phonocardiogram; C is an electrocardiogram. CI is Tsukuba in the above electrocardiogram, and the apex of Tsukuba C1 temporally corresponds to ED, and the first heart sound Bl appears on the phonocardiogram B at the same time as this Tsukuba C1, and the first heart sound Bl appears next. The second heart sound B2 temporally corresponds to ES.

However, with such conventional devices, the observer
Diagnosis and observation must be performed by visually viewing the image on T, which not only complicates the work, but also poses a problem in that high accuracy cannot be obtained.

The present invention was made in view of the problems of the conventional devices as described above, and is provided in an M-mode ultrasonic diagnostic device that displays an electrocardiogram and a phonocardiogram along with ultrasonic echo images. Provides an ultrasound diagnostic device that enables easy and highly accurate diagnosis and observation by automatically detecting the second heart sound and the timing of ventricular end diastole (ED) and end systole (ES). It is intended to.

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

FIG. 2 shows an M-mode ultrasonic diagnostic apparatus according to an embodiment of the present invention.
2) is an image memory that stores the output of this amplification/detector ill as digital data, 131° (4) is an amplifier that amplifies the heart sound and electrocardiogram waveform, respectively, and (5) is the apex of wave C1 and the phonocardiogram in the electrocardiogram. ED detecting the timing of ED and ES by detecting the second heart sound B2 of
ES detection circuit, (6) is this ED/ES detection circuit (5)
A timing decoder provides the timing of ED and ES obtained by the above to the image memory (2), (7) is an arithmetic processing circuit that arithmetic processes the digital data in the image memory (2), (8) is a phonocardiogram, The signal display processing circuit (9) performs signal processing to display electrocardiograms and ultrasound echo images as images, respectively, and (9) is the arithmetic processing circuit described above. r (71) and C for displaying the output of the signal display processing circuit (8) on the CRT.
It is an RT display device.

Also, Figure 3 shows the ED and ES detection circuit (5) in Figure 2 above.
) is shown, and in the figure, 6υ is a differential circuit that differentiates the electrocardiogram waveform, and @ indicates that the differential waveform by this differential circuit is 0.
The pulse generator that generates a pulse that becomes "H" for a predetermined period of time when the differential waveform changes beyond a predetermined reference value, that is, at the point of rotation, outputs @H" only when the differential waveform is above a predetermined reference value. This is a discrimination and gate circuit that outputs a heart sound waveform. Also, (Found) is a detection circuit that detects a heart sound waveform, and (To) is a heart sound detection circuit that outputs "H'" only when the output of this detection circuit (Foundation) is above a predetermined value. The gate circuit, the mark is the first AND circuit that uses the output of the above discrimination and gate circuit (to) and the output of the heart sound gate circuit (to), (5η is this first ANDN)
0 circuit power and the output of the above 0 cross pulse generator @2
This is a second AND circuit that is manually operated and generates an ED detection pulse at its output, and furthermore, a pulse forming circuit that forms a pulse that becomes ``H'' only when the output of the above-mentioned detection circuit (incorporated) exceeds a predetermined value. circuit, (to) this pulse forming circuit (branch)
and the output of the above-mentioned discrimination and gate circuit, and an exclusive OR (
This is a circuit (hereinafter referred to as EXOR).

Next, the operation will be explained.

The cardiac waveform, electrocardiographic waveform, and ultrasonic echo signal are amplified or amplified and detected by amplifiers +31 and +41 and an amplification/detector (1), respectively, and sent to a signal display processing circuit (8).
2, where it is converted into a video signal. At the same time, the amplified heart sounds and electrocardiogram waveforms are detected by the ED and ES detection circuits (5
) detects the apex of the electrocardiogram R#CI and the timing of the second heart sound B2 of the phonocardiogram, that is, the timing of ED and ES, and the timing decoder (6) stores the ultrasonic echoes as digital data. image memory (2).

Then, the data stored in the image memory (2) is processed by the arithmetic processing circuit (7) using the timing information of the ED and ES, and the cardiac function parameters are converted into numerical values. This arithmetic processing circuit (7) calculates, for example, the size of the heart, the heart rate, the ejection fraction indicating how much blood is ejected per stroke, and the ED.

The size, speed, etc. of the heart at the time of ES are calculated.

The various cardiac function parameter data obtained by the arithmetic processing circuit (7) in this way are output from the signal display processing circuit (8), such as the M-mode echocardiogram, phonocardiogram, and cardiac (
The operation of the ED and ES detection circuit (5) will be described in more detail below.

This ED and ES detection time 1 @ 151 focuses on the fact that the apex of the cardiac ridge wave C1 corresponds to the ED and the second heart sound of the phonocardiogram corresponds to the ES, as described above, and detects these. By this, the above-mentioned ED and ES are detected.

First, the electrocardiogram waveform a input to this device as shown in FIG. (To) is compared with a predetermined reference value VO,
The discrimination and gate circuit outputs @H1 only when the differential waveform is higher than the reference value VQ, that is, when it is a λ wave. In addition, the zero pulse generator receives the differential waveform, and the time point bo at which the differential waveform crosses zero is
That is, at the peak of the R wave, a pulse that becomes "Ho" for a predetermined period of time is output.

The heart waveform C shown in the one-way diagram 1c) is detected by a detection circuit (incorporated) and becomes a waveform d as shown in the diagram 1dl.

Then, at the gate circuit #I & (to) the detected waveform d, when the waveform d is greater than or equal to a predetermined value, the pulse forming circuit ends.
A pulse of H''' is generated.The output of this heart sound gate circuit (to) is input to the first AND circuit vIr (5bl) together with the output of the discrimination and gate circuit.

Therefore, this 1st AND circuit (to) outputs 1H'' when it detects a heart sound that is an electrocardiogram R wave and is greater than a predetermined value.Then, the output of this %1AND circuit (to) is from the above 0 to a. A second AND with the output of the pulse generator @
The signal is input to the circuit 6η, so that an ED detection pulse is obtained from the second AND circuit at the time when a heart sound equal to or higher than a predetermined value is detected at the peak of the wave in the electrocardiogram.

Further, the output of the pulse forming circuit (to) and the output of the discrimination and gate circuit (to) are input to the EXOR circuit (to), so that the output of the EXOR circuit (to) is An ES detection pulse is obtained when a heart sound of a predetermined value or higher is detected and an electrocardiogram R wave is not detected.

Therefore, according to the present device 1, the timing of El) and ES can be automatically detected, and this timing can be used to quantify cardiac function parameters, such as echocardiogram, phonocardiogram,
These cardiac function parameters can be displayed on the CRT together with the electrocardiogram, allowing even non-specialists to easily and accurately diagnose.

2. In addition to the M-mode ultrasonic diagnostic apparatus of the above embodiment, as shown by the broken line in FIG. 2, a marker generator α [
A mark indicating the timing of ED and ES may be displayed in the display image on the CRT.
In this way, in addition to the same effect as above, C
The ED and ES portions in the displayed image on the RT can be clearly distinguished, and even in an ultrasonic diagnostic apparatus that does not have an image memory (2), the timing of the ED and ES can be clearly displayed on the CRT.

Here, in the above embodiment, in addition to detecting the timing of ED and ES, this timing information is further used to quantify the cardiac function parameters, and this is displayed on the CRT together with the ultrasound echo image, electrocardiogram, and phonocardiogram. Although the case where they are displayed has been described, the cardiac function parameters may not be digitized automatically, but may be digitized by the observer from the displayed image on the CRT as needed.

As described above, according to the present invention, an M-mode ultrasonic diagnostic apparatus that displays a magnetocardiogram and a phonocardiogram along with ultrasound echoes detects the top of the wave on the electrocardiogram and the second heart sound on the phonocardiogram, and Since the timings of end-diastole and end-systole are automatically detected, there is an effect that diagnosis can be easily and accurately performed.

[Brief explanation of drawings]

FIG. 1 is a diagram showing a display image of an M-mode ultrasound diagnostic device, FIG. 2 is a block diagram of the M-mode ultrasound diagnostic device according to an embodiment of the present invention, and FIG. 3 is an EL diagram of the device f. )・A diagram showing an example of the circuit configuration of the ES detection circuit, and FIG. 4 is a signal waveform diagram of the device. (2)...Image memory, A...Ultrasonic echogram, C
... Cardiogram, CI ... λ wave, B ... Phonocardiogram, B2 ... Second heart sound, (5) ... ED, ES detection circuit, (8) ... Signal display Processing circuit, +9)...C
RT display is vague. Agent Shin Kuzuno - Figure 1

Claims (1)

[Claims] (1) An image memory that stores reflected ultrasound echoes from the human body as digital data, and a ventricular end-diastole (E
D) and ED to detect the timing of end systole (ES)
, an ES detection circuit, a signal display processing circuit that performs signal processing to display images of a phonocardiogram, an electrocardiogram, and an ultrasonic echo image, and the output of the signal display processing circuit is connected to C1L.
1. An M-mode ultrasonic diagnostic apparatus comprising: a CRT display device for displaying images on a T.