JPS624978B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention displays two electronic calipers in the image area of each mode on a display screen that displays images of B mode and M mode in parallel. The present invention relates to an ultrasonic diagnostic device that can measure distance or time.

Conventionally, as shown in Figure 3, in this type of ultrasonic diagnostic equipment that displays B mode display and M mode display in parallel, it is only possible to measure the distance between two points by specifying a caliper, and the M mode display The problem was that it was impossible to measure time on the screen. In order to solve this problem, an attempt has been made to display a time scale on the M mode display screen and measure time by referring to this scale, but although this method can measure time, it is difficult to measure the time. The problem is that it is very troublesome.

In view of these points, it is an object of the present invention to provide an ultrasonic diagnostic apparatus in which a caliper can be used not only for distance measurement but also for time measurement for M mode display.

The present invention will be explained in detail below using the drawings. FIG. 1 is a diagram showing the configuration of essential parts of an embodiment of an ultrasonic diagnostic apparatus according to the present invention. In Fig. 1, 1 is an analog-to-digital converter (hereinafter referred to as AD converter), 2 is an image memory, 3 is a digital-to-analog converter (hereinafter referred to as DA converter), 4 is a main caliper mover, and 5 is a sub 1 is a caliper mover, 6 is an arithmetic circuit, 7 is a character conversion circuit, 8 is a refresh memory, 9 is an adder, 10 is a CRT, and 11 is a video signal generation circuit. The echo signals sampled and digitized via the AD converter 1 are stored in the image memory 2 as appropriate. The data read from the image memory 2 is converted into analog by a DA converter 3. The caliper movers 4 and 5 are provided with manual operation levers 4a and 5a, respectively, and by operating these levers, the white cross-shaped calipers (main and sub) on the CRT screen can be moved in any direction. can. The outputs of the caliper movers 4 and 5 are written into a refresh memory 8 corresponding to the CRT display screen at any time. On the other hand, the outputs of the caliper movers 4 and 5, that is, the caliper position signals, are led to an arithmetic circuit 6. Based on the position of the caliper, the calculation circuit 6 calculates the distance between two points designated by the caliper on the B mode display screen.
Further, the M mode display screen is used to calculate distance and time. The character conversion circuit 7 converts the output data of the arithmetic circuit 6 into character data, thereby making it possible to display the output data on the CRT 10 in numbers. This character data is written to a predetermined address in the refresh memory 8. The video signal generation circuit 11 converts the contents of the image memory 2 and refresh memory 8 into the CRT 10 using a television system.
The image memory 2 and refresh memory 8 are appropriately controlled. The analogized output of the image memory 2 and the output of the refresh memory 8 are combined in an adder 9, and sent to the CRT 10 as a luminance signal. The contents of the image memory 2 and the refresh memory 8 are appropriately displayed on the screen of the CRT 10 using this luminance signal and a scanning signal (not shown). Note that the operations of the parts other than the arithmetic circuit 6 and the character conversion circuit 7 are the same as those of the conventional ultrasonic diagnostic apparatus and do not require any special explanation, so the explanation thereof will be omitted.

FIG. 2 is a configuration diagram showing one embodiment of the arithmetic circuit 8. As shown in FIG. Using the main caliper coordinates x _p , y _p specified by the main caliper mover 6 and the sub caliper coordinates x 1 , y ₁ specified by the sub caliper mover ₇ as input signals, first, the difference calculator 8 _xa calculates x _p -x. ₁ and set it as X _p . Next, the absolute value circuit 8 _xb takes |Xo| and sets it to X ₁ . Furthermore, the product operation circuit 8 _xc performs N・X ₁ , and the value _is
shall be. Regarding the Y-axis coordinate, M·Y ₁ →Y ₂ is obtained in the same manner as described above. X ₂ is further squared calculation circuit 8 _xd
is squared, which becomes X ₃ . Y ₂ regarding the Y axis is also squared in the square calculation circuit 8 _yd , and Y ₃
is required. Next, the sum operation circuit 8 _xe calculates X ₃ + Y ₃
＝Zo is calculated, followed by square root calculation circuit 8 _xf , √=
Z ₁ is required. In this case, the X-axis coordinate x
_p , x ₁ are reference values in comparator circuits 8 _xg , 8 _xh
Compared to REF. The reference value REF is B on the CRT screen.
It corresponds to the value of the X coordinate of the boundary point between the mode display and the M mode display (the M mode display is on the right side). When x _p and x ₁ are both larger than the reference value, in other words, when both calipers are within the M mode display screen, the outputs of comparator circuits 8 _xg and 8 _xh are both “1”.
Therefore, the signal A via the gate _8xi becomes "1". As a result, switch 8 _xj is switched, selects coefficient n ₁ , and gives n ₁ (coefficient for time conversion) as coefficient N to product calculation circuit 8 _xc , while switching switch 8 _xk and outputting Y ₂ . , Switch 8 _XL
Turn on and output X ₂ . In other words, when the caliper is within the B mode display screen, it outputs only Z ₁ (distance between two points), and when it is within the M mode display screen, it outputs Y ₂ (distance in the Y-axis direction) and X ₂ (X Outputs the time-converted value (time) in the axial direction.

With such a configuration, by moving the caliper on the display image and specifying a position, it is possible to automatically measure the distance or time between two specified points, and display the measured value.

As explained above, according to the present invention, by operating only the main caliper and the sub caliper, you can measure the distance between two points on the B mode display, the distance in the depth direction on the M mode display, and the time in the time axis direction. Each can be automatically measured and displayed, and is extremely effective in practical use.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of essential parts of an embodiment of an ultrasonic diagnostic apparatus according to the present invention, FIG. 2 is a block diagram of an embodiment of an arithmetic circuit, and FIG. 3 is a block diagram of a CRT display. 1...AD converter, 2...image memory, 3...
DA converter, 4... Main caliper mover, 5... Sub caliper mover, 6... Arithmetic circuit, 7... Character conversion circuit, 8... Refresh memory, 9... Adder, 10... CRT , 11... Video signal generation circuit.

Claims (1)

[Claims] 1. A B-mode image and an M-mode image are simultaneously displayed in parallel on the same screen, a movable main caliper and a sub caliper are displayed on the display screen, and the distance between the two calipers with respect to the displayed image is In an ultrasonic diagnostic apparatus that can measure the distance in the depth direction of the area and display the value, it is determined whether the positions of the two calipers are within the B-mode display area or the M-mode display area, and the position of the calipers is determined to be within the B-mode display area. When the time is within the M mode display area, the separation distance in the depth direction between the two calipers is calculated, and the time length corresponding to the separation distance in the depth direction and the separation distance in the time axis direction between the two calipers is calculated. means for automatically displaying the determined depth in a B-mode image and displaying the determined depth and time length in an M-mode image according to the positions of both calipers. An ultrasonic diagnostic device characterized by: