JPS6154413B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a B-mode image display system for displaying B-mode images, that is, tomographic images, and
Regarding ultrasonic diagnostic equipment equipped with an M-mode image display system for displaying (ultrasound cardiography), etc., in particular, recording time phase setting when recording any one frame of a B-mode display image by photographing, etc. This relates to display improvements.

In this type of ultrasound diagnostic apparatus, when recording one frame of a B-mode tomographic image by photographing, for example, setting the synchronization timing for instantaneous imaging of one frame of a dynamic ultrasound tomographic image that changes moment by moment in real time. The reference signal during ECG
(electrocardiograph) This is done by setting an arbitrary time phase for the waveform.

Conventionally, the setting time phase marker for setting the above-mentioned time phase and confirming the set time phase is displayed using a non-marker near the B-mode image B as a reference signal on the B-mode display image, as shown in FIG. Fade display (For example, a display method used to prevent the displayed waveform from fading sequentially on the display surface of a CRT ~ cathode ray tube ~, making it difficult to observe the waveform. For example, the waveform corresponding to the sweep time) Display signals are temporarily stored in memory, and then updated one after another, compressed in time, and read out repeatedly at high speed to display frozen waveforms without "fading" on the screen, for example, in a flowing manner.B mode display The bright line of the ECG waveform _R1 (often used as a reference signal waveform display on the screen) was blanked to create a break in the waveform, and this was used as marker _M1 . In addition, on an M mode display image, for example, a UCG display image, as shown in FIG.
PPM (pulse position
modulation ~ pulse position modulation) displayed ECG
Apply blanking to waveform R ₂ in the same way as above and add markers.
It was displaying _M2 . (PPM display; waveforms are displayed by displaying bright spots PPM-processed with reference signals on the scanning line of the UCG image U) However, in this case, the ECG waveform R ₁ on the B-mode display image Regardless of marker M ₁ of ECG waveform R 2, marker _{M 2 of} ECG waveform R 2 on the UCG display image
The marker itself is not very easy to see, and on top of that, the marker
There was a problem in that it was difficult to fully understand the phase relationship between M ₂ and the UCG image U. In other words, although it is extremely meaningful for diagnosis to accurately grasp the state in which one frame of a B-mode tomographic image is recorded on the UCG image and the ECG waveform as a reference signal, it is not clear. It is difficult to obtain sufficient information for diagnosis. Moreover, the ECG is displayed on the UCG display image.
Not only other reference signals such as PCG
(phonocardiograph), pulse waves, etc. may also be displayed on the same time axis, and it is desirable to be able to easily and clearly understand the interrelationship with these.

The present invention has been made based on the above circumstances, and it is possible to display the time phase of an instantaneous (one frame) recording of a B-mode image on an M-mode display image, making the correlation between the time phase and the M-mode image extremely clear. The purpose of the present invention is to provide an ultrasonic diagnostic device that can display images.

That is, the feature of the present invention is that, for example, as shown in the display image shown in FIG.
In order to indicate the recording time phase of instantaneous (one frame) recording of the B-mode tomographic image on the mode display image plane F,
Time phase setting marker M ₃ in the form of a line such as a bright line
The purpose of the present invention is to provide a marker display system for displaying.

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

FIG. 4 shows the main part of an embodiment in which a marker display system is incorporated into an M mode display system.
In the figure, 1 is an ECG amplifier that amplifies the ECG signal from the human body H, and 2 is a comparator that compares the ECG signal from ECG amplifier 1 with the Y-axis sweep signal for M mode display to obtain a rectangular wave pulse. , 3 is a differentiating circuit that extracts a sufficiently narrow pulse synchronized with the leading edge of the rectangular wave pulse outputted from the comparator 2 and obtains a PPM signal; For example, a synchronization pulse generation circuit detects the QRS wave and generates a synchronization pulse synchronized with (waveform repetition of) the ECG wave, 5 is a synchronization pulse generation circuit 4
6 is a time phase setting circuit for appropriately delaying the output pulse of, for example, by adjusting the variable resistor VR ₁ and outputting a pulse of an arbitrary time phase with respect to the ECG waveform. This is an OR circuit composed of a NOR gate 61 and an inverter 62, assuming that both output pulses are "L" (low level). In this case, the output pulse of the time phase setting circuit 5 shall have an appropriate pulse width, and this output pulse is also given to a 1-frame recording system related to the B-mode display system to determine the recording time phase (for example, when taking a photograph). used to control shutter timing). Further, the output of the OR circuit 6 is logically combined into an M mode display system as a Z signal (luminance modulation signal) and displayed.

The operation in such a configuration will be described below.

The ECG signal obtained from the human body H is given to the synchronization pulse generation circuit 4 via the ECG amplifier 1, and the synchronization pulse generation circuit 4 detects the QRS wave and generates a synchronization pulse in synchronization with the QRS wave. This synchronization pulse is given from the synchronization pulse generation circuit 4 to the time phase setting circuit 5, delayed by a time according to the setting value of the variable resistor VR ₁ for time phase setting, and output as a time phase setting pulse. On the other hand, comparator 2 compares the ECG signal from ECG amplifier 1 with the Y-axis sweep signal for M mode display, and uses the ECG signal to perform PWM control.
A (pulse width modulation) pulse train is created, which is further detected by a differentiating circuit 3 in the leading edge position of the pulse and converted into a PPM modulated pulse train. In other words, these comparator 2 and differentiation circuit 3 constitute a PPM modulation circuit, and as shown in FIGS. 5a and 5b, a sufficiently narrow pulse is generated at the intersection of the Y sweep waveform and the ECG waveform.
A PPM modulated signal using the ECG signal as a modulating wave is output. The time phase setting pulse outputted from the time phase setting circuit 5 and the PPM pulse outputted from the differentiating circuit 3 are ORed together in an OR circuit 6 and outputted as a Z signal of M mode display. When the brightness is modulated only by the PPM modulation pulse output from the differentiating circuit 3, the ECG waveform is displayed as shown in FIG. Since the phase setting pulses are logically synthesized, the signal output from the OR circuit 6 has a waveform as shown in FIG. 7a, and the setting time phase of the ECG waveform _R3 is A time phase setting marker _M3 consisting of a bright line (raster) is displayed at the position over the entire M mode display image plane. This is further logically combined with the original Z signal for displaying the M mode image, and a time phase setting marker _M3 is displayed on the M mode image as shown in FIG.

In this way, the linear time phase setting marker _M3 is displayed on the M-mode display image, so that the timing of recording one frame of the B-mode image can be very clearly grasped on the M-mode (UCG) image. In particular, it has great diagnostic significance in that it clarifies the correlation between changes in M-mode images and the set time phase.

In addition, the above-mentioned time phase setting pulse is also given to the B-mode image display system, and the display timing of the time phase marker for the ECG reference signal waveform on the B-mode display screen and the recording timing of instantaneous (one frame) photography of the B-mode image, etc. Used as a signal.

As described above, the present invention provides an ultrasonic diagnostic apparatus that can very clearly display the time phase of instantaneous recording of a B-mode image on an M-mode display image, and the correlation between the time phase and the M-mode image. can be provided.

Furthermore, according to the present invention, M mode (UCG)
On the display image, a linear marker indicating the instantaneous recording time phase of the B-mode image is displayed across the M-mode image and other reference signal (ECG, etc.) waveforms, so the marker, that is, the B-mode image Not only the phase relationship between the instantaneous recording time phase and the M-mode image, but also the mutual relationship between the M-mode image on the M-mode display image and other reference signal (ECG, etc.) waveforms, and these M-mode images.
The phase relationship between the mode image and other reference signal (ECG, etc.) waveforms and the time phase indicated by the marker can be easily and clearly grasped.

It goes without saying that the present invention is not limited to the embodiments described above and shown in the drawings, but can be implemented with various modifications without changing the gist thereof.

For example, in the above embodiment, bright lines are displayed by directly unblanking the raster scan of the M mode display, but bright line-like display may be performed using other methods.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an example of a B-mode display screen, FIG. 2 is a diagram showing an example of an M-mode display screen in a conventional device, and FIG. 3 is a diagram showing an M-mode display screen according to an embodiment of the present invention. FIG. 4 is a block diagram showing the configuration of an embodiment of the present invention, and FIG. 5a
and b are waveform diagrams for explaining the state of PPM modulation in the same embodiment, FIG. 6 is a diagram for explaining the PPM display in the same embodiment, and FIGS. FIG. 3 is a diagram for explaining an obtained signal waveform diagram and a display image based on the diagram. 1... ECG amplifier (ECG amplifier), 2... Comparator, 3... Differential circuit, 4... Synchronous pulse generation circuit, 5... Time phase setting circuit, 6... OR circuit.

Claims (1)

[Claims] 1. In an ultrasonic diagnostic apparatus equipped with a B-mode image display system for displaying a B-mode image and an M-mode image display system for displaying an M-mode image with at least one reference signal waveform, the Any one of the B-mode images obtained by the mode image display system
A time phase setting means for setting a recording time phase for recording a frame, and a time phase set by the time phase setting means to be used as an M mode image and a reference signal displayed on the display screen of the M mode image display system. 1. An ultrasonic diagnostic apparatus comprising marker display means for displaying a linear time phase setting marker spanning over a waveform.