JPS6029873A - Picture display device - Google Patents

Abstract

PURPOSE:To facilitate observation by providing three registers for a positive, a negative, and an optional value to registers where a window level and a window width are set, making an adjustment, and magnifying only a desired part. CONSTITUTION:The registers 17-19 hold the small positive value, ''0'', and small negative value, which are inputted to a register 23 through normally open contacts 20 and 22 and a normally closed contact 21. The output of a register 23 is inputted to a window processing means 14 through a register 9 to constitute a window level setting means 12. The outputs of registers 23 and 9 are fed back to an input side. For example, when the register 17 holds ''1'', the contact 20 is held made continuously and the contacts 21 and 22 are broken, so that the output of the register 23 increases in the order of 1, 2, 3... and the output of the register 9 increases in the order of 1, 3, 6, 10.... The contact 21 is used for a fine adjustment and the contact 22 outputs a negative output similarly. A window width setting means 13 is of the same structure. Consequently, a desired part is magnified and observed closely.

Description

DETAILED DESCRIPTION OF THE INVENTION TECHNICAL FIELD OF THE INVENTION The present invention relates to an image display device (6), and relates to an image display device with a significantly improved window processing mechanism.

What are the technical disadvantages of inventions and their problems? , A] In recent years, images have been divided into multiple pixels, each with 111 pixels, or 11 pixels.
! Digital images that reproduce and display images with an i-tone tone are increasing. A typical example is CT images.

Q CT images, especially X-ray 0] images are generally 110
/1000 step 1 leopard gradation from 00 to +3000 (
) expressed. However, it is not only meaningless for humans to display the 4,000-level gradation as it is (for example, on a display) because humans do not have the ability to distinguish the 4,000-level gradation. Is the circuit defective? It's the economy. Therefore, in general, manual digitalization;
- So-called window processing is performed in which the image data is displayed after converting it into an appropriate brightness change.

For example, when viewing both CT images of the un section (monochrome display), the window level (reference value of digital 410) = O.

Set the window width (width of digital values) to 200. The display screen in this case is as shown in Figure 1.
A pixel with a CT value of T IFI = O is defined as bright gray at the center of the display screen), a pixel with a CT value of -100 or less is defined as black, and a pixel with a CT value of +100 or greater is defined as black.
Pixels that have a value are displayed as white. ,Mo,C]-
Between the value -100 and -1'OO, the brightness corresponds to the value 110 (lightness that exists between white and black).

Next, CT image IA of the lungs! When viewing (white, black display), wind level -500, wind width = +1
Set it to 000. In this case, the display screen is as shown in Figure 2, where the pixel with a CT value of -500 is bright gray in the center of the display screen, and the pixel with a CT value of -1000 is
Pixels with a T value are displayed as black, and pixels with a CT value of 0 or more are displayed as white. 1-1 Regarding the window level and window width when viewing both CT images of the head and lungs at an angle of 3° or more. As described above, there are several examples, and the window level and window width need to be set appropriately depending on the processing target (subject part) or the state of the processing target.

Next, a conventional image display device equipped with such a window processing function will be described with reference to FIG.

FIG. 3 is a schematic diagram showing a conventional image display device. The part J indicated by the broken line 12 in the figure is a wind level setting means for setting the wind level.
Registers 5, 6, 7.8, switches 1.2, 3.4, and the registers 5.6, 7.8 that turn on (transfer state) and A-off (non-transfer state) the outputs of these registers, respectively.
It consists of a register 9 which takes the output manually.

Here, the register 5 has a large positive value, the register 6 has a large negative value, and the register 7 has a small positive value.
A small negative value of l is held in advance in the register 8. Also, the registers 5, 6.
7.8 is a register that has a function of modifying the value outputted from either of 7.8 at specific intervals. On the other hand, the broken line 13 indicates the window width for determining the wind width.
It is a width setting means, and has a vine configuration similar to the window level setting means 12. The outputs of the window level setting means 12 and the window width setting means are respectively input to the window processing means 14 disposed at the subsequent stage, and are inputted from the outside as explained using FIGS. 1 and 2. The input digital image data 16 is subjected to window processing.

The image data subjected to the window processing is then provided for image display on the display means 15 disposed at the subsequent stage.

Next, the operation of the conventional device that performs 4R as described above will be explained. For example, when switch 1 is turned on, the large positive value held in register 5 is transferred to register 9, so register 9 increments this value at specific intervals and changes the current wind level to a large positive value. If you turn on switch 2, the window will increase in steps.
The level increase roars in small steps. Similarly, turning on switch 3 will reduce the current wind level by 2 in large steps, and turning on switch 4 will reduce the previous DI2 wind level. It's a small step. Therefore, the switch 1.3 is used for fast changing the wind level, and the switch 2.4 is used for slow changing (fine adjustment) the wind level.

On the other hand, the window width setting means 13 configured similarly
45, the C window width can be set by the same switch operation as in the window level setting means 12.

By the way, in the conventional device (, 1, 1, when setting a wind vessel, a desired wind value is set by first changing it at high speed and then changing it at low speed (fine adjustment) in the vicinity of a predetermined value.

However, when the change range of the digital image data value is large (4000 steps IW from -1000 to 3000) like the image of C-ding@, the fixed two-step change of high speed and low speed of the conventional device is not possible. Inconvenient 3. This is because it is difficult for the operator to visually set the appropriate window value because it is not possible to check the sequential changes in the display image when the display image changes at high speed. Since the display screen changes in large steps, there is a risk of passing the optimum window 1]j1, and with small step changes for fine adjustment, it may take a long time 11!i to reach the optimum window value. Therefore, there are ways to increase the number of types of change Daruma, for example, register 5 in Figure 3.
Although it is conceivable to increase the number of switches 1 to 8 and the corresponding switches 1 to /I, this would not only increase the number of devices but also make the operation more troublesome.

[Object of the Invention] The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide an image display device that can easily set a suitable window.

1 Overview of Komei) The outline of the present invention for achieving the above object is to provide an image display device including a window level setting means, a window width>y determination means, and a window processing means. The window width setting means includes a first register capable of outputting a positive value, a second register 0'Q capable of outputting an arbitrary value, and a 4r third register capable of outputting a negative value. , the outputs from each of these registers are switched 11i, and the third register and the outputs from each of these registers are selected.
j At(operation 1') switching control means equipped with a switch capable of selecting the output of the second register, and the switching control rjl
+ means calculates the output of each register selected by the first calculation means, and calculates the output of the first calculation means and the held value that has already been maintained or gradually decreased. a second arithmetic means for generating an output;
2? Window processing the output from the ii calculation means 3! I! There is C, which is characterized by being input into a means.

[Embodiment of the Invention] An embodiment of the present invention will be described below with reference to the drawings.

FIG. 11 shows the configuration of an image display device according to the present invention.
18 is a block diagram, and the same functions as those of the conventional device shown in FIG.

Switches 20, 21, and 224 in Fig. 4 are switches that operate in conjunction with each other in the Tato section 1.
In the Fr state, the switches 20 and 221 are turned on (transfer state), and the switch 21 is turned on (transfer state).

When the switch 20 or 22 is turned on, the switch 21 automatically turns to the A position. Switch it to iVi! I calculation 1
It is called means 25.

The first register 17 holds a small positive value of 171, and the third register holds a value of 1 or a negative lIX.
Fourth register 23 with two-man power through 0.22
It is input to one input side 23b of the.

A second register IEN for initial till setting is held, and its output is sent to switch 2.
1 to the other input of the fourth register 23
23a. Fourth register 231J, inside! j Bill! 10th) Register 17 or ff! 2
register]9h1etilI! IXM (m 'i ''A (liii
The added results in the registers are placed in the latter part of the 6th page!
5σ] is input to the register 9 at any time. This g l (in this case, the fourth register 23 is referred to as the first arithmetic means). Manoko, the fifth register 9 also has a control function αfi L/"C
A3, ncf ei 4th (7) L/Sister 23
Ka'> lz M 3 tt Luno Jll +i #
, '1'A (1+C+). This σ) meaning ℃, is also called the calculation means of ηS2.

On the other hand, the window width setting means 13 is also in the same position as the window level setting means 12.

Then, the wind level setting means 12σ) 111 horn 10 and the wind level setting means 13-1'1 horn 1
The outputs of 1 are placed in the subsequent stages respectively:
It is input to the processing means and digital [Φ1 (brass data 1
G is subjected to window processing. Win 1 ~ Place 3! p1
Window processing is then performed, and the image 11 of the indicator 8i15 placed at the subsequent stage is displayed.

Next, the operation of the image display device (2) configured as described above will be explained. First, the switch 20.21°22 is in the normal state a3, and the second register 18 is held 1ir+r.
When OJ is transferred to the fourth register 23 via the switch 21, the fourth register 23 holds its value and transfers it to the fifth register 9. Further, the fifth register 9 adds the value rOJ transferred from the fourth register 23 to the previously held value at regular intervals, and outputs the value to the window start means 14, This value determines the initial value of the wind level (1, 4), and the wind level does not change in this state.

Next, when switch 20 is turned on, switch 21 becomes ΔFJ.
At the same time, the value held in the first register 17 (a small positive value) is transferred to the fourth register 23 via the switch 2o. The fourth register 23 adds the value held in the previous state, the value transferred from the second register 1 (3), the value transferred from the first register 17, and the addition result. C1 is transferred to the fifth register 9.The fifth register 9 stores the value held in the previous state, that is, the value transferred to the fourth register 23 in the previous state, and the new Add the value transferred from the register 23 of No. 4,
The wind player Jj [1 means 14] will take out that Kashin Yusong. Here, as the switch 20 continues to be turned on (the transfer state continues), the first register 17
The values transferred from C to C are added in the fourth register 23 at specific intervals, and the results of the pulverization are added to C in the fifth register 9. For example, the first register 1
The value held in register 7 is “1” and the value held in second register 18 is r.
When OJ returns, switch 20 is turned on for 1 stroke,
The output of the register 23 of N3 /I is [l, 2.3.
4, 5.6......'', and the output of the fifth register 9 is rl, 3, 6, 10, 15.21...
...] and goes to C. Therefore, the rate of change of the wind level becomes gradually faster as the time for which the switch 20 is kept on is elapsed. Furthermore, when the switch 20 is turned off, the switch 21 is turned on, and the fourth register 23 returns to its initial state based on the value held in the second register 18. Therefore, when the switch 20 is turned on again, the speed of change in the wind level is as follows. Return to initial speed. On the other hand, when the switch 22 is turned on, the output of the third register 19, which holds a negative value, is transferred to the fourth register 23, so the output of the fifth register 9 becomes a negative value. value.

Then, the change in the wind level will change in the opposite direction from when the switch 20 was turned on.
The rate of change gradually becomes faster as the time elapses while the switch 22 is kept on, as described above.

U: tc, similarly (111) also in the window level setting means 13, the wind level setting means 12
Change the window width by operating the switch like Do161.
I can do that.

Therefore, while monitoring the display image on the display means 15, if the A verator determines that the target area (or the entire image) is deaf and is far from the appropriate window value, the A verator turns on the switch 2. Further, it is sufficient to keep the LL switch 22 and the corresponding window width setting means 13 on, and the switch C
It is also possible to turn off the switch for a moment to slow down (reduce) the window value change speed (change rate). And A
Perator has an aptitude window (near 111)
7i, you can fine-tune the window shift by turning on the above-mentioned switch intermittently.

It should be noted that the present invention is not limited to the above-mentioned embodiments, but may be modified as appropriate within the scope of the gist of the present invention.For example, the switching control means may be configured SWITCH J:20,21.22 and these switches-
to; [J I+6 wind width setting means 13
The switch may be a mechanical switch or an electronic switch (for example, a touch switch), and the key is to control the value transfer state between registers (transfer state, non-transfer state).
Any means to do so can be applied. Also, the first and second
The calculation means is not necessarily limited to a cash register as long as it has a calculation function.

1. Effects of the Invention According to the present invention described above, since the window value change rate can be easily controlled by switch operation, an image display device that can easily identify an appropriate window value can be provided.

[Brief explanation of drawings]

1 and 2 are explanatory diagrams for explaining window processing, FIG. 3 is a schematic diagram showing the composition of a conventional image display device, and FIG. 4 is an image far display according to the present invention. 4 is a schematic block diagram illustrating the 414 configuration of the device. 9...Fifth register, 12...Window level setting means, 13...
...Wind 1 noise setting means, 14...
- Window processing means, 15...Display means, 17
...First register, 18...Second register, 19...Third register, 20.21.22. ...Switch, 23...
...Fourth register.

Claims (1)

[Scope of Claims] A screen comprising a window level setting means, a window width setting means and a window processing means (at the display device angle, the window level setting circuit and the window width setting means have a positive The first register can output any value, such as the first register, which can output a value of 1, the second register can output a negative value, and the third register can output a negative value, and the output from each of these registers can be cut off. 41 control string both 1st and 3rd
1 control means having an externally operable switch for selecting the output of the second register at any time when the output of the second register is selected; a first calculating means for calculating the output of the disk; and a second calculating means for calculating the output of the first calculating means and the already held value and generating an output that gradually increases or decreases. to the second calculation means 111 (
44cm) 1z cutting [Science and engineering [0 hours human power 17T l
An image display device characterized by: