JP2001296944A - Image display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image display device capable of easily adjusting display states of various images. SOLUTION: In an operation to adjust a level value and a window value of an image by moving a mouse 7 as pressing a center button of the mouse 7 at a state that a medical image is displayed, changed quantity of the level value and the window value for moving quantity of the mouse 7 is changed by pressing a right button of the mouse 7 while moving the mouse 7 as pressing the center button.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image display apparatus, and more particularly to an image display in which a level value and a window value are adjusted by moving a mouse while pressing an arbitrary button of a mouse while displaying an image. Related to the device.

[0002]

2. Description of the Related Art In displaying medical image data, a range of image data to be displayed is set by a level value and a window value and is displayed on a display. Conventionally, a level value and a window value have been adjusted using a rotary encoder, a trackball, or a mouse. In particular, the adjustment of the level value and the window value by the mouse is performed by moving the mouse while pressing an arbitrary button of the mouse, for example, the middle button. For example, the amount of vertical movement of the mouse is detected, the level value is changed according to the amount of movement, and the amount of horizontal movement is detected, and the window value is changed according to the amount of movement.

Further, for example, a horizontal movement amount of a mouse is detected, a level value is changed according to the movement amount, and a vertical movement amount is detected, and a window value is changed according to the movement amount. I was Further, in such a mouse operation, there has been a method of linearly increasing and changing the amount of change in the level value and the window value when the mouse moves for a predetermined time or more.

[0004] In the above-described setting change of the level value and the window value due to the movement of the mouse, the level value and the window value are changed arbitrarily in proportion to the movement amount of the mouse.

[0005]

However, in a diagnostic environment where, for example, CT images and MR images are mixed, the level value and window value for optimally displaying each image are different. For example, in a CT image, the level value is 5
0, window value 100, level value 50 for MR images
0 and the window value have different degrees, such as 1000. In this case, when the amount of change in the level value and window value with respect to the amount of mouse movement is fixed to a value suitable for the CT image, the MR
In the case of an image, the amount of change is too small. On the other hand, if the value is set to an optimum value for an MR image, the amount of change is too large in a CT image, which makes adjustment difficult.

In the method of adjusting the level value and window value by linearly increasing the amount of change when the mouse moves for a certain time or more, the display state is optimized immediately before the end of the display state adjustment by the mouse operation. It is difficult to stop mouse operation suddenly. For this reason, unnecessary movement of the mouse occurs when the change amount is increasing,
There were problems such as the need to adjust again.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide an image display device capable of easily adjusting the display state of various images.

[0008]

According to the present invention, in order to achieve the above object, when a pointing device is operated while an image is displayed, the display state of the image is changed according to the operation amount of the pointing device. In the image display device to be changed, there is provided a switching means for switching the amount of operation of the pointing device and the degree of change of the display state of the image.

According to the present invention, the switching means switches between the amount of operation of the pointing device and the degree of change in the image display state. This makes it possible to easily adjust the display state of various images.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of an image display device according to the present invention will be described below in detail with reference to the accompanying drawings.

FIG. 1 is a block diagram showing an example of a hardware configuration to which the present invention can be applied. In FIG. 1, 1
Is a CPU, 2 is a main memory, 3 is a magnetic disk, 4 is a display memory, 5 is a CRT, 6 is a controller, 7 is a mouse,
Reference numeral 9 denotes a communication interface, 10 denotes a removable storage medium interface, 11 denotes various drive devices, and 12 denotes an image processing accelerator, which are connected to the common bus 8.

The magnetic disk 3 stores a plurality of medical images, a program for executing the method of the present invention, and the like. The CPU 1 reads the plurality of medical images and a program for executing the present invention, performs an operation such as three-dimensional image processing using the main memory 2, sends the result to the display memory 4, and displays the result on the CRT monitor 5. Let it. The mouse 7 connected to the controller 6 is used as a means used for adjusting the display state of an image and performing a general operation of the system.

Reference numeral 9 denotes a communication interface such as Ethernet (registered trademark), which is used to communicate with a CT device or an MR device and acquire image data. 10 is SCS
This is a removable storage medium interface that uses an I interface or the like.
Drive device 1 for m tape, CD, CDR, DVD, etc.
1 is connected, and CT and MR data are obtained, and external data is stored and stored in the processing data using media adapted to various drive devices. The image processing accelerator 12 performs three-dimensional image processing at high speed. In this system configuration, it is assumed that the processing can be performed by the CPU without the image processing accelerator. CRT13 is a CRT for extension,
Multiple equipment can be provided as needed. In this embodiment, the CRT 5 will be described, but the extension CRT 13 can be implemented.

Next, a method of implementing the present invention using the medical image display apparatus configured as described above will be described with reference to FIGS.

FIG. 2 shows a state in which a medical image is displayed.
In the operation of adjusting the level value and the window value of the image by moving the mouse 7 while pressing the middle button of the mouse 7, the right button of the mouse 7 is pressed while the mouse 7 is moved while pressing the middle button The mouse 7
A method of changing the amount of change between the level value and the window value with respect to the moving amount of the moving object will be described.

In the case where the present invention is implemented by operating a mouse while an image is displayed on the CRT 5, it is implemented by software processing shown in FIG. Hereinafter, the flow of software processing will be described.

It is determined whether the middle mouse button has been pressed on the image displayed on the monitor 5 (step 20). If the middle mouse button is not pressed (No),
The processing related to the present invention is ended. If the middle mouse button is pressed, the position of the middle mouse button is pressed and stored (step 21), and a reading waiting time (t) is provided to detect the movement state by the mouse operation (step 2).
2). The mouse position (X
2, Y2) is read (step 23). It is determined whether the right mouse button has been pressed (step 24). If the right mouse button is not pressed (No),
Normal processing for changing the display state of the image based on the level value and the window value using the mouse operation is performed (step 3).
0). The amount of movement of the mouse (ΔX, ΔY) when the degree of change is not changed is calculated.

ΔX = (X1−X2) * a Equation 1 ΔY = (Y1−Y2) * b Equation 2 In Equations 1 and 2, a and b are usually given in a system for implementing the present invention. Is the parameter of the amount of change to be made.

On the other hand, if the right mouse button is pressed in step 24, the degree of change in the display state of the image based on the level value and window value using the mouse operation is changed (step 25). The level value is an intermediate value between the lower limit and the upper limit in the range, and the window value is the difference between the lower limit and the upper limit. By setting the level value and the window value, the lower limit and the upper limit of the range are set. Value is set. The amounts of movement of the mouse (△ X, △ Y) are calculated by Expressions 3 and 4. ΔX = (X1−X2) * a * α Expression 3 ΔY = (Y1−Y2) * b * β Expression 4 In Expressions 3 and 4, α and β are parameters for changing the degree of change.

After calculating the amount of mouse movement (ΔX, ΔY) in step 25 or 30, a level value and a window value to be readjusted are calculated from the amount of mouse movement (step 2).
6). Level value = Level value−ΔX Expression 5 Window value = Window value−ΔY Expression 6

The display state of the image is changed according to the level value and window value obtained by the above calculation (step 27). This changing process is a process performed in a normal medical image display process, and converts a pixel value within a set lower limit value and upper limit value range into a tone for image display, and converts the image value into tone-converted image information. Display an image based on the image.

The position of the mouse read this time is stored as the position of the mouse before the movement (step 28). X1 = X2 Expression 7 Y1 = Y2 Expression 8

It is determined whether or not the state in which the middle button is pressed is continued (step 29). If the button is pressed, the process returns to step 22 to determine again whether there is a request to change the display state of the image based on the level value and window value using the mouse operation. If not, the process ends.

In FIG. 2, the middle button and the right button have been described as the buttons of the mouse 7 embodying the present invention. However, the present invention is not limited to this. Is also possible.

FIG. 3 shows a state in which a medical image is displayed.
In the operation of adjusting the level value and the window value of the image by moving the mouse 7 while pressing the middle button of the mouse 7, a predetermined key of the keyboard is pressed while the mouse 7 is moved while pressing the middle button. In this manner, a method of changing the amount of change between the level value and the window value with respect to the amount of movement of the mouse 7 will be described.

In the embodiment shown in FIG. 3, step 2 in FIG.
Instead of determining whether the right button of the mouse 7 has been pressed in step 4, the same determination is performed for the Shift key on the keyboard. FIG. 3 illustrates the Shift key as a key for implementing the present invention. However, the present invention is not limited to the Shift key, and any key on the keyboard can be used according to system settings or the like.

In this embodiment, the operation is changed in two stages. However, by reading a plurality of mouse buttons or keyboard keys during a mouse operation, the display state in three or more stages is changed. Changing the setting of the degree is similarly possible, though not shown.

[0028]

According to the present invention, it is possible to easily adjust the display state of various images by switching the operation amount of the pointing device and the degree of change of the display state of the image by the switching means.

[Brief description of the drawings]

FIG. 1 is a hardware configuration diagram to which the present invention can be applied.

FIG. 2 is a flowchart of software for implementing the present invention only with a mouse.

FIG. 3 is a flowchart of software for implementing the present invention with a mouse and a keyboard.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... CPU, 2 ... main memory, 3 ... magnetic disk, 4 ... display memory, 5 ... CRT, 6 ... controller, 7 ... mouse, 8 ... common bus, 9 ... communication interface, 10 ...
Removable storage medium interface, 11 various drive devices, 12 image processing accelerator, 13 C
RT

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G09G 5/00 510 A61B 5/05 380 (72) Inventor Hidegai Takagi 1-1-1, Uchikanda, Chiyoda-ku, Tokyo No. 14 F term in Hitachi Medical Corporation (reference) 4C096 AB37 AD14 AD15 DC30 DD09 5B069 AA10 BB16 CA06 DD11 HA08 JA02 KA02 5C082 AA04 AA24 CB01 CB06 DA87 MM09 5E501 AA25 AC34 BA05 CA03 CB09 EA07 EB06 FA

Claims (1)

[Claims] 1. An image display device which changes a display state of an image in response to an operation amount of the pointing device when the pointing device is operated while displaying an image, the operation amount of the pointing device and the image An image display device comprising a switching means for switching the degree of change of the display state of the image display.