JPH02274236A - Ultrasonic diagnosis device - Google Patents

Abstract

PURPOSE:To enable the turning display of a tomogram image with a relatively simple constitution and in a short processing time by making (n+1) with the addition of (f) to a sound ray number (n) during saving in memory as a sound line number N in the sound ray memory. CONSTITUTION:When an operator enters a rotational angle theta, CPU 2 sets an offset (f) in an offset register 3, and effective regions (N1 ana N2) and (r1 and r2) in an address register 6. As a result, the sound ray data D of an actual sound ray number (n) is saved as a sound ray number N in sound ray memory 5. In transferring data from the sound ray memory 5 to a video memory 11, only the sound ray data D of sound ray numbers becomes effective due to a mask part 10, and interpolation is made substantially only in the aforesaid effective regions. In addition, X and Y coordinates are made to correspond to N and (r) addresses in an address conversion part 8, and the sound ray data is written in the video memory 11. As a result, a displayed image shows a tomogram image vertically directed and turned by theta.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an ultrasonic diagnostic apparatus, and more particularly to an ultrasonic diagnostic apparatus that can rotate a tomographic image within a screen.

[Conventional technology] An example of a conventional ultrasonic diagnostic apparatus is shown in FIG.

In this ultrasonic diagnostic apparatus 51, a detection section 21 including a probe, a transmitting/receiving section, etc. performs a sector scan as shown in FIG. 9, and obtains sound ray data D for each sound ray.

Therefore, as shown in FIG. 10, the sound ray data D is output from the detection unit 21 for each sound ray number n and in order of the depth r on the sound ray.

The address conversion unit 31 converts the sound ray number n and the distance r on the sound ray into X, Y coordinate values of the display screen, and converts the sound ray number n and the distance r on the sound ray into the frame memory 3.
Enter 2. Therefore, the frame memory 32 contains the first
As shown in FIG. 1, sound ray data D is stored corresponding to the X and Y coordinates of the display screen.

The sound ray data D stored in the frame memory 32 corresponds to the X and Y coordinates of the monitor 34, so it is read out as is and displayed on the screen of the monitor 34.

Note that the interpolator 33 interpolates the portion between each sound ray data D.

Problems to be Solved by the Invention] In the conventional device 51 described above, the center line of the sector is oriented in the vertical direction of the screen. Therefore, when the probe is pointed straight down, the direction of the center line of the sector and the vertical direction of the tomographic image match, so the vertical direction of the screen and the vertical direction of the tomographic image also match.
there is no problem.

However, when the probe is oriented diagonally, the direction of the center line of the sector does not match the vertical direction of the tomographic image, so the vertical direction of the screen and the vertical direction of the tomographic image also do not match, which may cause confusion for the observer. .

Therefore, as shown in FIG. 12, it is conceivable to rotate the tomographic image by the same angle θ as the angle of the probe. In any case, the single-fold layer image rotation method that performs the loess conversion has problems in that the configuration is complicated and the processing time is long.

SUMMARY OF THE INVENTION An object of the present invention is to provide an ultrasonic diagnostic apparatus that has a relatively simple configuration and can rotate and display tomographic images in a short processing time.

[Means for Solving the Problems] The ultrasound diagnostic apparatus of the present invention is an ultrasound diagnostic apparatus that displays a tomographic image on a screen using a sector method or a convex method, and generates an offset f according to a rotation angle θ of the tomographic image. A value n+f obtained by adding the offset f to the sound ray number n of the manually input sound ray signal is set as the sound ray number N for storage and corresponds to the sound ray number N and the distance r on the sound ray. a sound ray memory that stores sound ray signal data D;
data reading means for reading sound ray signal data D from the sound ray memory by converting the X, Y coordinate values into a sound ray number N and a distance r on the sound ray in the order of X and Y scanning of the display screen; The configuration is characterized in that it includes a screen display means for displaying the sound ray signal data D as the brightness and/or color of the X and Y coordinate positions.

[Function] The relationship between the addresses of the sound ray memory and the data reading means is fixed. Therefore, the angles on the screen of the sound rays with sound ray numbers N to be read out are each fixed.

However, when it is stored, the sound ray number N in the sound ray memory is set to n+f, which is obtained by adding the offset f to the sound ray number n in the probe.

Therefore, the angle on the screen changes by the offset f, so if the offset f is determined in accordance with the desired rotation angle θ, the tomographic image can be rotated by the angle θ.

[Embodiments] The present invention will be explained in more detail below with reference to embodiments shown in the drawings. Note that this invention is not limited to this.

FIG. 1 shows an ultrasonic diagnostic apparatus 1 according to an embodiment of the present invention.

The detection unit 21 is the same as the conventional component described with reference to FIG. Therefore, as shown in FIG. 9, sound ray data D is obtained for each sound ray by performing sector-based scanning, and as shown in FIG. Sound ray data D is output in order. For convenience of explanation, the sound ray number n is from 0 to 127 as shown in Figure 2.
, and the angle of the detection area is 60 degrees.

Further, it is assumed that the depth r on the sound ray is from 0 to k.

The CPU 2 calculates an offset f corresponding to the rotation angle θ manually inputted by the operator, and sets it in the offset/soto register 3. The offset f is calculated using the following equation.

f=128+128θ/60 However, -60≦θ≦+60 The offset adder 4 adds the offset f set in the offset register 3 to the actual sound ray number n of the sound ray data, and adds the offset f set in the offset register 3 to the sound ray number n in the memory. It is manually entered into the sound ray memory 5 as the line number N.

The sound ray memory 5 stores sound ray signal data D corresponding to the sound ray number N and the distance #r on the sound ray. As shown in FIG. 3, sound ray numbers N=0 to 383 can be stored.

In addition, the CPU 2 has the effective areas (Nl, N2) and (
r1. r2) and set it in area register 6. Effective area (Nl, N2) and (rl,
r2) can be set arbitrarily by the operator, but basically N1=f, N2=f+127. rl=o.

r2=k is automatically set.

The X,Y generator 7 sequentially generates the Xl and Y coordinates of the display screen, and the address converter 8. Input to video memory 11 and interpolator 33.

The address converter 8 converts the coordinates (x, y) as shown in FIG.
It has a correspondence table of addresses (N, r) and converts the XY coordinates output from the X, Y generator 7 into N, r addresses and outputs them to the sound ray memory 5 and the area determining section 9.

Upon input of the N and r addresses, the sound ray memory 5 outputs the corresponding sound ray data D.

The area determining unit 9 compares the valid areas (Nl, N2) and (r 1. r 2) held in the area register 6 with the N and r addresses output from the address converting unit 8, and operates the masking unit 10. If the latter is included in the former, the output data D of the sound ray memory 5 is passed to the interpolation unit 33, and if the latter is not included in the former, data that becomes a dark area on the screen is passed to the interpolation unit 33 instead of the output data D. Output.

The interpolation unit 33 is similar to the conventional component shown in FIG. 8, and interpolates the portion between each sound ray data D by calculation.

The video memory 11 stores data D from the interpolation section 33 in correspondence with the X and Y coordinates of the display screen.

The data D stored in the video memory 11 is stored on the monitor 3
Since it corresponds to the X and Y coordinates of 4, it is read out as is and displayed on the screen of the monitor 34.

Now, if the operator inputs θ=30 degrees, the CPU
2 sets the offset f=192 in the offset register 3, and sets the effective area (N1=192.N
2=319), (rl=0.r2=k).

Therefore, the sound ray data D of actual sound ray numbers n=o to 127 is stored in the sound ray memory 5 at sound ray numbers N=192 to 319, as shown in FIG.

When writing from the sound ray memory 5 to the video memory 11,
The mask unit 10 makes only the sound ray data D of sound ray numbers N=192 to 319 valid, and interpolation is substantially performed only in that area. Then, as shown in FIG. 4, the address converter 8 associates the X, Y coordinates with the N, r addresses, so the sound ray data D is written into the video memory 11 in the arrangement shown in FIG. It will be done.

Therefore, in the end, the screen display becomes as shown in FIG. This is a tomographic image (double-dashed line) facing straight down at θ=+30
It is nothing but something that has been rotated by a degree.

Similarly, the tomographic image can be rotated arbitrarily within the range of 160 degrees to +60 degrees.

Note that in the present invention, the sector method and the convex method are equivalent, and the present invention can also be applied to the convex method in the same way as described above.

[Effects of the Invention] According to the ultrasonic diagnostic apparatus of the present invention, a tomographic image can be rotated by an arbitrary angle with a relatively simple configuration and in a short processing time.

Therefore, if the tomographic image is rotated in accordance with the angle at which the probe is tilted, the vertical direction of the screen and the vertical direction of the tomographic image will match, thereby eliminating viewer confusion and improving diagnostic efficiency.

[Brief explanation of drawings]

Fig. 1 is a block diagram of the main parts of an ultrasonic diagnostic apparatus according to an embodiment of the present invention, Fig. 2 is a conceptual diagram showing the sound ray numbers in the probe, Fig. 3 is a conceptual diagram of the sound ray memory, and Fig. 4 is a conceptual diagram showing the sound ray numbers in the probe. A conceptual diagram showing the correspondence between coordinates (X, Y) and addresses (N, r) in the address conversion section, FIG. 5 is a conceptual diagram showing the arrangement of sound ray data in the sound ray memory,
Fig. 6 is a conceptual diagram showing the data arrangement of the video memory corresponding to the arrangement of sound ray data in Fig. 5, Fig. 7 is a conceptual diagram of the screen display corresponding to the data arrangement of Fig. 6, and Fig. 8 is a conventional diagram. Figure 9 is a conceptual diagram showing the sound ray numbers in the probe, Figure 10 is a conceptual diagram of the sound ray data output from the detection unit, and Figure 11 is a frame memory FIG. 12 is a conceptual diagram showing another data arrangement in the frame memory. (Explanation of symbols) 1...Ultrasonic diagnostic device 2...CPU 3...Offset register 4...Offset addition section 5...Sound ray memory 6...Area register 7...X, Y Generator 8...address conversion unit 9...area determination unit 11...video memory.

Claims (1)

[Claims] 1. An ultrasonic diagnostic apparatus that displays a tomographic image using a sector method or a convex method on a screen, comprising an offset generator that generates an offset f according to a rotation angle θ of the tomographic image, and an input sound. The value n+f obtained by adding the offset f to the sound ray number n of the line signal is the sound ray number N for storage.
a sound ray memory that stores sound ray signal data D corresponding to the sound ray number N and the distance r on the sound ray;
, a data reading means for converting the X, Y coordinate values into a sound ray number N and a distance r on the sound ray in the order of Y scanning and reading sound ray signal data D from the sound ray memory; and the read sound ray signal data. An ultrasonic diagnostic apparatus comprising screen display means for displaying D as the brightness and/or color of the X, Y coordinate position.