JPS6086673A - Picture display device - Google Patents

Abstract

PURPOSE:To make adjustment unnecessary even in case of input of different CT picture data by controlling a window level and a window width in accordance with additional information in picture data to convert a density. CONSTITUTION:A host computer 1 performs control when picture data to which window information is added is transferred to a picture display device. Picture data whose beginning window information is added to is inputted to a memory 7 through an interface 2, and only picture data is stored there, and window information is detected by a detecting means 3 and is inputted to a window level control part 5 and a window width control part 6 through a window information carrying means 4. Outputs of these parts 5 and 6 are inputted to a density converting means 10, and the window processing of picture data read out from the memory 7 is peformed, and the output is displayed as a picture on a display means 12 such as a CRT display or the like through a mixer 11. Thus, adjustments of the window level and the window width at each time of input of different CT picture data are made unnecessary.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an image display device for displaying matrixed and matrixed image data in a radiation tomography apparatus.

[Technical background of the invention and its problems]

In recent years, there has been an increase in the number of digital images in which the image is divided into a plurality of pixels and a gradation value is given to each pixel to reproduce and display the image. Typical examples include CT and images.

Both CT images, especially X-ray CT16 images, are generally expressed in 4000 gradations from -1000 to +5000.

However, since humans do not have the ability to distinguish between the 4,000 gradations, so-called window processing is generally performed in which input digital image data is converted to an appropriate brightness ratio before being displayed.

For example, when viewing a head OCT image (black and white display), the window level (baseline digital value) is 20.

Set window width (width of digital value)=200. The display screen in this case is as shown in Figure 1.
Pixels with a T value of 00 are displayed as bright gray in the center of the display screen, pixels with a CT value of -100 or less are displayed as black, and pixels with a CT value of +100 or more are displayed as white. Ru. And CT value -100 to +1
Up to 00, the brightness is between white and black depending on the value.

Next, when looking at the 07 image (black and white display) of the lung region, set the window redness = -500 and the window width = +1000. In this case, as shown in Figure 2, the display screen is such that pixels with a CT value of -500 are displayed as bright gray at the center of the display screen, and pixels with a CT value of -1ooo are displayed as black. , Furthermore, pixels having a CT value of 0 or more are displayed as white.

Above, we have described the wind level and window width when viewing 07 images of the head and lungs, but these are -
For example, the wind level and window width are
It is necessary to set it appropriately depending on the processing target (subject part) or the state of the processing target.

By the way, in conventional image display devices, when displaying, for example, a 07 image of the head after land processing, the window level and window width are set to be suitable for a head OCT image. When displaying the 07 image of the lungs, first display the C'r image of the lungs at a window level and window width suitable for the 07 image of the head (in this case, it will naturally become unclear), and then display the 07 image of the lungs. The procedure was to adjust the wind level and wind width to 111 degrees to suit the conditions.

In this way, each time different CT image data is input,
First, an image is displayed, and then the window level and window width are adjusted again to be suitable for the image.

[Purpose of the invention]

The present invention has been made in view of the above circumstances, and
To provide an image display device which can easily switch display images without adjusting the window level and window width each time even when image data is input.

[Summary of the invention]

The outline of the present invention for achieving the above object is as follows: storage means for storing only input image data with additional information added; image data K read from the storage means; and a window level control signal. and an image display device comprising: a density conversion unit that performs window processing according to a window width control signal; and a display unit that displays image data subjected to the window processing by the density conversion unit, wherein the additional information is added. a detection means for detecting additional information in image data inputted by the detection means; and a window control means capable of outputting a window level control signal and a window width control signal according to the additional information detected by the detection means to the density conversion means. It is characterized by comprising the following.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 3 is a block diagram showing the configuration of the image display device according to the present invention, and numeral 1 indicates, for example, a host computer that controls the transfer of image data with window information added to the device. .

This window information is information for determining the window level and window width during window processing, which will be described later. will be added. The image data to which window information has been added in this manner is inputted via the interface 2 to storage means, for example, the memory 7 and the detection means 6, which are arranged at a later stage. This memory 7 stores only image data in accordance with the control signal of the memory control means 80, and the detection means 3 detects the window Ii'f information added to the beginning of the image data. . The wind information detected by this detection means 6 is transmitted to a wind level control section 5 and a window width control section 6 disposed at a subsequent stage via a window information conveying means 4.
is man-powered. This window level control unit 5 sets the window level of the image data based on the window information inputted via the window information conveying means 4, and the output of the window level control signal is arranged at a subsequent stage. It is input to the density converting means 10.

Further, the window width control section 6 sets the window width of the image data based on the window information inputted via the window information conveying means 4, and the window width control signal outputted from the window width control section 6 is as follows. The signal is input to the density converting means 10 arranged at a subsequent stage. Incidentally, the window level control section 5 and the window width control section 6 constitute a window control means 14. The density conversion means 10 performs window processing on the image data read out from the memory 7 based on the outputs of the window level control section 5 and the window width control section 6, and its output is arranged at a subsequent stage. mixer 1 for combining video signals
1 for image display on a display means 1, for example on a CRT display.

Next, the operation of the device configured as shown in 5 will be explained. The image data input via the host computer 1 is supposed to have the optimal window level and window information added to the image data in advance. When image data to which such window information is added is input to the present device, only the image data is stored in the memory 7, and the window 1 report is detected by the detection means 6.

The window information detected by the detection means 3 is inputted to the wind level control section 5 and the window width control section B via the window information conveyance means 4. The window level control section 5 and the window width control section 6 output a window level control signal and a window width control signal, respectively, based on the window information input via the window information conveying means 4. The density conversion means 1o then performs window processing on the image data read out under the control of the memory control means 8, based on the window level control signal and the window width control signal. This concentration conversion means 10
The image data subjected to window processing J411 by
After being combined into a video signal by the mixer 11, it is provided for image display on the display means 12.

Therefore, each time image data to which optimal window information has been added for each image is input to the present apparatus, window processing suitable for the image is automatically performed.

It goes without saying that the present invention is not limited to the embodiments described above, and that modifications can be made as appropriate within the scope of the gist of the present invention.

For example, in the above embodiment, the window information is added to the beginning of the image data input via the post computer 1, but the window information is not limited to this, and may be added to the end of the image data, for example.

Furthermore, the window processing using this k lit is effective also when displaying multiple images.

〔Effect of the invention〕

According to the present invention described above, each time image data is input, the optimal window processing for the image is automatically performed and the image is displayed, so even when different CT image data is input, the image is displayed automatically. There is no need to adjust the wind level and window width each time. Therefore, it is possible to provide an image display device in which display images can be easily switched and displayed.

[Brief explanation of the drawing]

1 and 2 are explanatory diagrams for explaining window processing, and FIG. 3 is a block diagram showing the configuration of an image display device according to the present invention. 6... detection means, 7...・Memory (storage means), 10
...Concentration conversion means, 12...Display means, 14...
- Window control means.

Claims (1)

[Claims] A storage means for storing only the image data of input image data with additional information added, and a density for performing window processing in accordance with a window level control signal and a window width control signal on the image data read from the storage means. In an image display device comprising a conversion means and a display means for displaying image data subjected to window processing by the density conversion means, detection for detecting additional information in input image data to which the additional information is added. and window control means capable of outputting a window level control signal and a window width control signal according to the additional information detected by the detection means to the density conversion means.