JPH0341935A - Time phase averaging system for ultrasonic diagnostic device - Google Patents

Abstract

PURPOSE:To eliminate the lapse of time in an image and to exactly display an image of a quick motion such as the heart, etc., by displaying an image obtained by bringing some line image data of the present frame, and the same line image data of the frame being preceding to an averaged same time phase. CONSTITUTION:By an arithmetic part 2, etc., some line image data of the present frame, and the same line image data of the frame being preceding by one which read out of an auxiliary memory 1 are brought to an averaged same time phase. By the line image data brought to the time phase averaged, an image is displayed. In this case, the image data of the present frame is written in the auxiliary memory 1, and used at the time of the averaged same time phase averaging the next time. Accordingly, by displaying the image obtained by bringing some line image data of the present frame, and the line image data of the frame being preceding to the averaged same time phase and by the adding, a lapse of time in an image in one screen is eliminated, and an image of a quick motion such as the motion of heart, etc., can be exactly displayed.

Description

[Detailed Description of the Invention] [Summary] Regarding a time phase averaging method that performs time phase averaging of images of an ultrasonic diagnostic device, the time difference between line image data of the current frame and line image data of the previous frame is determined. The purpose is to display the image data after phase averaging, eliminate the temporal difference between images within the screen, and accurately display fast-moving images such as the heart. An auxiliary memory for storing image data is provided, and time phase averaging is performed on the line image data with the current image data and the same line image data of the previous frame read from the auxiliary memory. The image is displayed using the line image data after the conversion.

[Industrial application field]

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

[Prior art and problems to be solved by the invention] Conventionally, ultrasonic diagnostic equipment scans sequentially by changing the ultrasound beam direction, as shown in the sector scan type in Figure 4 (b), and uses the obtained image data. It is displayed as is on the display.

Therefore, as shown in FIG. There is a problem that a time difference occurs between images, making it impossible to accurately display fast-moving images such as those of the heart.

The present invention displays image data after time-phase averaging of line image data of the current frame and line image data of the previous frame, and eliminates temporal differences between images within one screen. The aim is to accurately display fast-moving images such as the heart.

[Means to solve problems]

Means for solving the problem will be explained with reference to FIG.

In FIG. 1, the auxiliary memory 1 is Previous frame This is a memory that stores frame image data.

The calculation unit 2 performs time-phase averaging (time-averaged addition) of the line image data of the current frame image data and the same line image data of the image data of the previous frame read from the auxiliary memory 1. ).

[Effect]

As shown in FIG. Time-phase averaging (time-averaged addition) is performed with the image data, and an image is displayed using the line image data after this time-phase averaging. At this time, the image data of the current frame is written into the auxiliary memory 1 to be used during the next time phase averaging.

Therefore, by displaying an image obtained by time-phase averaging (time-averaged addition) of the line image data of the image data of the current frame and the line image data of the image data of the previous frame, This eliminates temporal differences between images within one screen, making it possible to accurately display fast-moving images such as the heart.

〔Example〕

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

In Figure 1, ultrasound image data is image data obtained by transmitting ultrasound pulses to a living body from an ultrasound transmitter/receiver (not shown), receiving and amplifying the ultrasound pulses reflected and scattered by the living body. be.

The auxiliary memory 1 is a memory that stores ultrasound image data. This auxiliary memory 1 is for taking out the image data of the previous frame and performing temporal averaging.

The calculation unit 21 performs time-phase averaging (time-averaged addition) of the line image data of the current ultrasound image data and the same line image data of the image data of the previous frame read out from the auxiliary memory 1. (described later using FIG. 2).

The memory 3 stores image data after time phase averaging has been performed by the arithmetic unit 2. The image data stored in this memory 3 is sequentially read out, inputted into a TV display system memory, converted into serial video No. 13, and displayed on a display.

FIG. 2 shows a conceptual explanatory diagram of the present invention, where the line number is the line number of the ultrasound image data in FIG. There is. Line image data of current frame image data (0)
or n-1), and the line image data of the image data of the previous frame is expressed as (0)゛ or n-1)
If expressed as ', the line image data of the image data to be obtained after time-phase averaging is (O)° or n-1)', where (0)° or nl)' is expressed by the following formula, I
Find it by calculating I.

(O)°・(0)・・・・・・・・・・・・・・・(1
)(1)' = (n-1)/n X(1)+1
/nX(1)' HHHHH+! 2)(2)°
・(n-2)/nX(2)+2/nX(21'
・ ・ ・ ・ ・ ・(3)(n) '=l
/n x(n)+(n4)/n X(n)'...
...(41) As shown in the above equations (1) to 4, the line image data ((0) to n-1 of the current frame)
)) and the same line image data of the previous frame (
(0) 'soon n-1)') are weighted and added to obtain time-phase averaged line image data ((0) 'none (n-1)°). These obtained line image data ((0) "None (r+-1)"
) is converted into a video signal and displayed on a display, the data can be displayed on the screen as if there is no temporal difference, and even fast-moving images, such as images of the heart, can be displayed accurately.

Next, the configuration and operation of one embodiment of the present invention will be sequentially explained in detail using FIG.

In FIG. 3, the ultrasonic transceiver 4-1 transmits ultrasonic pulses to a living body, receives and amplifies the ultrasonic waves reflected and scattered from the living body, and sends out image data. .

The ultrasonic transmission/reception control unit 4-2 controls the ultrasonic transceiver 4-1 and outputs ultrasonic image data (line image data) for each scanning line. This line image data is converted into digital line image data by A/D and input to the data processing section.

The data processing section is composed of 4-3 to 4-7 and performs time phase averaging.

The auxiliary memory 4-3 stores image data in association with line numbers.

In the ROM 4-4, line image data with a certain line number of the current image data input from the A/D and image data of the previous frame read from the auxiliary memory 4-3 with the same line number are stored in the ROM 4-4. Line image data is used as an address input, and the results of temporal averaging as shown in equations (1) to (4) described above are output as data.

The line memory 4-5 is a memory that stores line image data after being time-phase averaged by the arithmetic ROM 4-4.

The address conversion unit 4-6 performs address conversion of the line image data read from the line memory 4-5, and
This is to write to the memory 4-7.

The TV memory 4-7 is a memory for serially reading out written image data.

The TV display control unit 4-8 converts serial image data read from the TV memory 4-7 into an analog video signal (for example, an RGB video signal) using a D/A.

The TV display 4-9 displays the video signal input from the RV display control section 4-8.

As described above, the values for calculating temporal averaging are written in advance in the 64 calculation ROM 4-4, and the line image data of the image data of the current frame and the value of the previous frame read from the auxiliary memory 4-3 are stored in advance. The same line image data of the image data of the frame is used as an address, and the line image data as a result of time phase averaging is read out and displayed on the TV display 4.
By displaying at -9, it becomes possible to display ultrasound images with no temporal difference within the screen.

〔Effect of the invention〕

As explained above, according to the present invention, time-phase averaging (time-averaged addition) of line image data with image data of the current frame and the same line image data of image data of the previous frame Since the system employs a configuration that displays images that have been processed (inclusive), it is possible to eliminate temporal differences between images within one screen and accurately display fast-moving images such as those of the heart.

[Brief explanation of drawings]

FIG. 1 is a diagram illustrating the principle of the present invention, FIG. 2 is a diagram illustrating the concept of the invention, FIG. 3 is a diagram illustrating the configuration of an embodiment of the present invention, and FIG. 4 is a diagram illustrating the generation of an ultrasound image. In the figure, 1.4-3 is an auxiliary memory, 2 is a calculation unit, 3 is a memory, 4-4 is a calculation ROM, 4-5 is a line memory, 4-
9 represents a TV display. -1 4-2 -3 -4 -5 -6- 7- Ultrasonic transceiver Ultrasonic transmission/reception control section Auxiliary memory Operation ROM Line memory Address conversion section TV memory TV display Configuration diagram of an embodiment of the present invention 1st scan floor (B) 8-mode display (mouth) Ultrasonic image generation explanation

Claims (1)

[Claims] In a time-phase averaging method for time-phase averaging images of an ultrasound diagnostic device, an auxiliary memory (
1), the line image data with the current image data and the same line image data of the previous frame read from the auxiliary memory (1) are time phase averaged, and this time phase averaging is performed. 1. A time phase averaging method for an ultrasonic diagnostic apparatus, characterized in that an image is displayed using line image data obtained after image data is applied.