JPH0341934A - Display system for ultrasonic diagnostic device - Google Patents

Abstract

PURPOSE:To allow to coincide time phases of ultrasonic images of a second and a first cine-loops and to improve the reliability of understanding a shape of the heart, etc., by displaying together the ultrasonic image written in a second image memory or the ultrasonic image written in a first image memory. CONSTITUTION:The subject system is provided with a first image memory 1 which writes a frame of an ultrasonic image at every prescribed period, and also, stops new write in accordance with a freeze instruction from an operator. Also, this system is provided with a second image memory 2 for writing a frame of an ultrasonic image corresponding to a time phase of a frame number instructed from the operator in the frames written in a first image memory 1. Moreover, the ultrasonic image written in a second image memory 2 is displayed, or furthermore, the ultrasonic image, etc., written in a first image memory 1 are displayed together. Accordingly, the time phase of the ultrasonic image written in a second image memory 2 is allowed to coincide with the time phase of the ultrasonic image designated by the operator in the ultrasonic image written in a first image memory 1, and the reliability of understanding a shape of the heart, etc., is improved.

Description

[Detailed Description of the Invention] [Summary] Regarding a display method for displaying images of a predetermined time phase of an ultrasound diagnostic device, the image storage time phase of the second cine loop is made to match the time phase of the first one, and the cardiac The first image memory is designed to improve the reliability of shape recognition, etc., and is configured to sequentially write ultrasound image frames generated at predetermined intervals and stop new writing in response to a freeze instruction from the operator. , this first
a second image memory for writing an ultrasound image frame corresponding to the time phase (time phase from the R wave of the electrocardiogram) of the frame number instructed by the operator among the frames written in the image memory; The ultrasonic image written in the second image memory is displayed, or the ultrasonic image written in the first image memory is also displayed together.

[Industrial application field]

The present invention relates to a display method for displaying images of a predetermined time phase of an ultrasonic diagnostic apparatus.

[Prior art and the problem to be solved by the invention] Conventionally, in an ultrasonic diagnostic device, multiple images are sequentially stored, and when the image freezes according to an operator's instruction, the previous 100 images are recorded as a video from this freeze phase. There is a so-called cine loop function that displays images or static images. With this cine loop function, it is now possible to easily select and observe images obtained with optimal tie selection from continuously stored images without having to synchronize with biological signals such as electrocardiograms. . Particularly in color Doppler, which displays blood flow information in two dimensions, this function is essential for observing instantaneous changes in blood flow conditions. In addition, it has two or more of these cine loops and memorizes two cross sections, making it easy to understand the three-dimensional shape of the heart and calculate the cross-sectional area of regurgitation, which is necessary to determine the flow rate of valve regurgitation.

However, there is no guarantee that the time phase in which the first image was captured matches the time phase in which the second image was captured, and the operator must rely on his or her knowledge of the image to grasp the shape. , there was a problem of lack of reliability.

An object of the present invention is to match the image coordination time phase of the second cine loop with the first time phase, thereby improving the reliability of understanding the shape of the heart.

[Means to solve problems]

A means for solving am will be explained with reference to FIG.

No.! In the figure, a first image memory 1 is an image memory in which frames of ultrasound images generated at predetermined intervals are sequentially written, and new writing is stopped in response to a freeze instruction from an operator.

The second image memory 2 stores an ultrasonic image frame corresponding to the time phase (time phase from the R wave of the electrocardiogram) of the frame number specified by the operator among the frames written in the first image memory 1. This is the image memory for writing.

[Effect]

As shown in FIG. 1, the present invention includes a first image memory 1 that sequentially writes frames of ultrasound images generated at predetermined intervals and stops new writing in response to a freeze instruction from an operator; A second image memory 2 in which a frame of an ultrasound image corresponding to the time phase (time phase from the R wave of the electrocardiogram) of the frame number instructed by the operator among the frames written in the first image memory 1 is written.
The ultrasonic image written in the second image memory 2 is displayed, or the ultrasonic image written in the first image memory l is also displayed.

Therefore, the second Cineloop ultrasound ii! The time phase of the ii image (the ultrasound image written in the second image memory 2) is
Ultrasound image of the first cine loop (first image memory 1
It is possible to match the time phase of the ultrasonic image specified by the operator among the ultrasonic images written in the image, thereby improving the reliability of understanding the shape of the heart.

〔Example〕

Next, the configuration and operation of an embodiment of the present invention will be sequentially explained in detail using FIGS. 1 to 3.

In FIG. 1, an electrocardiograph 3 detects an R wave of an electrocardiogram, which is a biological signal.

The internal timing circuit 4 sends a 5can start signal (scan start signal) for starting scanning of a living body by ultrasonic pulse to the ultrasonic transmitting/receiving circuit 7 and the time phase difference detecting circuit 5. This internal timing circuit 4 can be synchronized by the Re5et signal from the delay circuit 6. For example, as shown in FIG. 2 (b) to be described later,
Time tZResat delayed by delay 1d12 from R wave
By manually inputting the signal to the internal timing circuit 4, the relevant Re5et
The 5-can start signal can be started in synchronization with the signal and can be synchronized.

The time phase difference detection circuit 5 stores the ultrasound image in a first image memory l.
When writing to , it detects the amount of delay (time phase difference) between the R wave and the start of the first 5 can signal after this R wave (for example, the delay Wd 11 in Fig. 2 (a) d
L2, d13), this delay amount is
1 and remember it.

The delay amount F#I6 is for generating a Re5et signal and inputting it to the internal timing circuit 4 at the time when the signal is delayed by a specified delay amount from the R wave. As a result, for example, an ultrasonic image with a simultaneous phase of 9° is obtained with frame number 9, which waits for a period delayed by the number of frames (2 in the figure) multiplied by the delay of 1 frame in the delay 31d 12 in Figure 2 (b). It becomes possible to write a series of images into the second image memory 2.

The ultrasonic transmitting/receiving circuit 7 sends out ultrasonic pulses in the 5-can start signal interval, receives and amplifies the signals reflected from the living body, and sends out an ultrasonic image.

The ultrasonic probe 8 transmits and receives ultrasonic pulses.

Display diagram &89 shows an ultrasound image read out from the first image memory 15 and second image memory 2 and displayed on the CRTIO.

CRTIO displays ultrasound images.

The main cputt executes various ff, lI? based on programs not shown in the figure. It performs Il. The Frz instruction is a freeze instruction, and is a signal for stopping writing to the first image memory l, as shown in FIG. 2(a) FRZ signal.

FIG. 2 shows an explanatory diagram of the operation of the present invention.

FIG. 2(A) shows "FRZ instruction" in FIG. 0, which shows how an ultrasound image is written to the first image memo +71.

shows the point in time when the operator gave the freeze instruction from the keyboard.The 24 frames (corresponding to about two cycles worth of frames) consisting of 7 frame numbers 1 to 24 are shown backwards from this FRZ instruction. 1 is written and stored in the image memory 1 asynchronously with the R wave. When writing this,
The amount of delay between the R wave and the first 5-can signal sent after the R wave is stored as dll, d12, and d13. Further, a diagonally shaded frame number 9 in the figure is a frame of a time phase that the operator has specified to be displayed from among frame numbers 1 to 24 stored in the first image memory 1.

FIG. 2(B) shows the manner in which the ultrasound image of the time phase specified by the operator is written into the second image memory 2.
d12'' is the shaded part that represents the amount of delay between the R wave with the period of frame number 9 that you specified to display in Figure 2 (a) and the first 5 can signal sent after this R wave. , an ultrasound image whose time phase coincides with frame number 9 in FIG. 2 (a) is written into the second image memory 2.

Next, the operation of the configuration shown in FIG. 1 will be described in detail in accordance with the order shown in the flowchart of FIG. 3 and with reference to FIG.

In FIG. 3, ■ indicates real-time display. As shown in FIG. 2 (a), an ultrasound image generated in real time is displayed on the CRTIO.

@, executes a freeze instruction. This is done by notifying the Frz instruction from the keyboard etc. to the main CPU I and executing the command shown in Figure 2 (
As shown in b), it indicates that writing to the first image memory 1 is stopped at the time of the FRZ instruction.

0, the operator specifies a cine frame (for example, frame number 9). This means that, as shown in FIG. This indicates that the ultrasonic image of the time phase of frame number 9 is designated to be written into the second image memory 2.

[Phase] reads the specified 9th Delay amount. This is the Delay between the R wave with the period of frame number 9 in Figure 2 (A) and the first 5 can signal sent after this R wave.
Indicates that layfftd12 is to be read.

(2) specifies the delay amount to the delay circuit 6;

This is the period Del of frame number 9 read out in ■.
Only aytd12 is 1' when delayed from R wave? ese
Indicates that the t signal is specified to be sent.

[Phase] outputs the Re5et signal. This indicates that the delay circuit 6 outputs the Re5et signal to the internal timing circuit 4 at the time of delay by Delayild12 specified by ■.

In (2), the internal 24477 circuit 4 starts scanning in synchronization with the output of the [phase] Re5et signal.

[Phase] writes the ultrasound image into the second image memory 2 (see FIG. 2 (b)).

[Phase] is displayed. As shown on the right, this is the ultrasound image (second
(b) Ultrasonic image of frame number 9) is displayed on the CRTIO, or this ultrasonic image and a real-time ultrasonic image are drawn and displayed simultaneously as image 2.

〔Effect of the invention〕

As explained above, according to the present invention, an ultrasound image that matches the time phase of a designated ultrasound image written in the first image memory 1 is written into the second image memory 2, and this Since the configuration is such that the ultrasound image written in the second image memory 2 is displayed, and the ultrasound image written in the first image memory 1 is also displayed, the second cine loop The operator of the ultrasound image (the ultrasound image written into the first image memory 1) of the first cine loop determines the time phase of the ultrasound image (the ultrasound image written into the second image memory 2). It is possible to match the time phase of the specified ultrasound image, and it is possible to improve the reliability of understanding the shape of the heart.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of an embodiment 1I of the present invention, FIG. 2 is a diagram illustrating the operation of the present invention, and FIG. 3 is a flowchart illustrating the operation of the present invention. In the figure, 1 is a first image copying mechanism, 2 is a second image memory,
3 is an electrocardiograph, 4 is an internal timing circuit, 5 is a time phase difference detection circuit, 6 is a delay circuit, 7 is an ultrasound transmitting/receiving circuit, 8 is an ultrasound probe, 9 is a display circuit, 10 is a CRT, 11 is a main CPU represents.

Claims (1)

[Claims] In a display method for displaying images of a predetermined time phase of an ultrasound diagnostic apparatus, frames of ultrasound images generated at predetermined intervals are sequentially written, and new writing is performed in response to a freeze instruction from an operator. The first image memory (1) to stop the process, and the time phase (time phase from the R wave of the electrocardiogram) of the frame number specified by the operator among the frames written to this first image memory (1). A second image memory (2) in which a frame of a corresponding ultrasound image is written, and the ultrasound image written in the second image memory (2) can be displayed or further stored in the first image memory (1). A display method for an ultrasonic diagnostic apparatus characterized by being configured to display a written ultrasonic image, etc.