JPS5868788A - Waveform display - 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 a waveform display device that displays time-shifted waveforms on a screen that is displayed in the f-method on a television program.

Although the present invention can be widely applied to a general display device, for convenience of explanation, the following description will be made using a 161-meter ultra-fractional θU diagnosis as an example.

In general, 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 echoes. There are A mode, IS mode, M mode, etc. as modes displayed on the ultrasonic reflected echo fCRT or the like.

Here, the A-mode display shows the time waveform of the reflected wave from the human body as it is; the horizontal axis is time, and the vertical axis is the vibration intensity, that is, the intensity of the reflected wave, which changes as time progresses. This is a time-shifted waveform in which this value changes.

On the other hand, in the B mode reference, the amplitude of the time waveform of the reflection from the human body is modulated in brightness when it is displayed on the C light T, and is displayed as a series of temporally continuous bright spots. The M mode shows the movement of each part in the body by sequentially arranging and displaying the bright lines from the B mode.
This is often used to display the movement of the heart.

By the way, when an M-mode screen is displayed on a CRT using the television scanning method, if it were possible to display an A-mode time-shifted waveform, such as an electrocardiogram, next to the M-mode screen, it would be possible to display a cardiac, etc. It is extremely desirable for the diagnosis of
The scanning method was changed between the television scanning method screen display and the time-shifting art dealer display, and the time-shifted waveform was displayed as a square line similar to the Nunkroskov waveform. However, in this conventional method, the scanning method must be changed on the screen of the same CRT, which complicates the circuit configuration, and for the same reason, there is a drawback that only real-time display is possible.

Furthermore, when the time-shifted waveform is a unitary waveform, only one display is displayed, and sufficient brightness cannot be obtained, making it difficult to see.

This invention has been made in view of the above-mentioned problems in the conventional art. The value XO1 of the address counter corresponding to the reference position to display
and the amplitude value of the time-shifted waveform 1) il, whereas [xn
(When the condition of
By displaying the time-shifted waveform on the screen with the luminance of address The purpose of the present invention is to provide a θU type display device fi that can be used.

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

FIG. 1 shows a θU-shaped display device according to an embodiment of the present invention, which is used in an ultrasonic diagnostic apparatus as shown in FIG. This is an example when the A-mode image of the ultrasonic echo of the upper X1 (H) is displayed simultaneously.
flH21 is an X (horizontal) direction and Y (vertical) direction address counter for television scanning control, and (3) is an address counter for storing the amplitude value of the ultrasonic echo signal as a digital value. +21 address values x, y are input, an echo memory device that outputs the contents of the address, (4) is this echo memory device (
3) Output 1) A latch circuit that latches xl when X=xl, (5) is the address count value X, the output DXl of the latch circuit (4), and the standard of the A-mode image H on the display screen. The address count I1.1iixO of the position is input, and the above X is the condition [xO<x<xO×Dxll
! ], and when satisfied, outputs a digital signal corresponding to a predetermined brightness of the CRT, for example, the maximum brightness; JW signal output 13. ．． (7) is a υ/A converter that converts the output of this OR circuit (6) to υ/A, and (8) is the above-mentioned D/A converter (7)
This is a c tt 'r monitor that displays the output of .

Next, the operation sequence will be explained.

The echo storage device (3) stores the amplitude information of the ultrasonic echo as a digital value, and its contents are read out as primary luminance information Dx, y by inputting the address counter (11t21+). These outputs 1) x and y are latched by the latch circuit (4) when the address value of the X direction address counter (1) becomes xl, and the output Dx of the latch circuit (4) is sent to the comparator circuit (5). is input.

Also, this comparison circuit (5) is inputted with the address value XO of the display reference position of the time-shifted waveform.
The address value X of the X direction address counter (1) is also always (
S) Input 2, the comparison record saving condition [...〈・く・・＋
DxQ] is satisfied or is a sound, and when it is satisfied, the output of the echo storage device (3) is 0.

On the other hand, when there is an output from the echo storage device (3), the output from the comparison circuit (5) is 0, so the OR circuit +61 passes through the non-O output as it is -9,1)/A
A converter (7) converts this into an analog value (which is then added to the CRT monitor 18 as a luminance signal). Therefore, on the monitor 18), an M-mode image (2) of the echo signal is displayed, and an A-mode image (2) of the ultrasonic echo at the position XI of the echo image (2) is displayed.

According to the device of this embodiment having such a configuration, Z, and operation, display is performed using the normal television scanning system, so it is not possible to use CI (Ti) of the normal television scanning system as a display device. In addition, since the display of the A-mode image if is a surface display in which all the shaded areas in the figure glow white, it is very easy to see, and it is easy to see even if the brightness is insufficient even for a single waveform with a short time width. In addition, since no signal processing is required to switch the scanning method between two r+ilI+m, the time display can be performed using LJ functions.

In addition, although the above-mentioned embodiment describes the case where the N1 mode display and the A mode display are displayed in a composite manner in the ultrasonic diagnostic apparatus, the present invention is not limited to this, and the present invention is not limited to this, and the present invention is not limited to this. This can be applied to any case where a time-shifted waveform and a time-shifted waveform are to be displayed in a composite manner.

As described above, according to the present invention, the television scanning method (using the screen and the time-shifted waveform as they are in a synthetic manner and setting all the parts corresponding to the amplitude of the time-shifted waveform at a predetermined brightness) is used. Since the time-shifted waveform is displayed on a plane, it is possible to use CλT of the normal television scanning system, and it can be displayed in real time.Furthermore, since it is displayed on a plane, it is easy to see even old waveforms. be.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a θν type display device according to one embodiment of the present invention, and FIG. 2 is a diagram showing a display screen according to the above embodiment. tl+ +21...X (horizontal) direction, Y (vertical) direction address counter (3)...Echo storage device
(5)...Comparison circuit (7)...I)/A converter, tel...monitor.

Claims (1)

[Claims] (1) A display screen using the television scanning method (this is a waveform display device that synthesizes and displays time-shifted waveforms by vertically aligning their time axes, and has horizontal and vertical directions that control the address of the display screen). an address counter, a storage device storing a luminance signal of a screen to be displayed in the television scanning system, which is address-controlled by the address counter numbers, and a value of the horizontal address counter
, the value of the horizontal address counter at the reference position where the time-shifted waveform on the display screen is to be displayed is XO, and the amplitude value of the time-shifted waveform is Di. ≦X≦xO+1]i] that outputs a signal of a predetermined value when a is added; an L)/A converter that converts the output S of the storage device and the output of the comparison circuit into IJ/A;
A waveform display device comprising: a monitor that displays the output of the I/A converter.