JP2003220057A - Image display apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve diagnosis accuracy and diagnosis efficiency by providing a time-series radiation image in a visible form. <P>SOLUTION: An image of difference in change with time emphasizing the change with time is obtained by storing a plurality of time-series image data photographing the same part of the patient at different times and further obtaining the difference between the time-series images. And, it becomes possible to immediately identify the change with time detecting the image of the difference in the change with time on an original image, by displaying the update image of the above stored time-series images as the original images and further simultaneously displaying the above image of the difference in the change with time on another display to make it possible to simultaneously interpret the above original image and the image of the difference in the change with time. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image display device, and more particularly to an image display technique suitable for diagnosis based on a plurality of medical radiation images.

[0002]

2. Description of the Related Art Radiation images such as X-ray images are often used for diagnosing diseases, etc. In order to obtain this X-ray image, X-rays transmitted through a subject are applied to a phosphor layer (fluorescent screen). Irradiation, thereby generating visible light, and irradiating this visible light to a film using a silver salt in the same manner as in ordinary photography to develop, so-called radiography has been widely used (for example, patents References 1 and 2).

In the diagnosis based on the observation of the radiograph, for example, a plurality of films obtained for the same subject at different times are arranged on an observation device such as a Schaukasten (film observation device), and the doctor makes them. In some cases, the images (time-series images) are compared with each other and the time-varying portion is recognized based on one's own empirical knowledge for use in diagnosis.

As described above, the method of comparing and referencing images in time series with each other is to detect a newly-occurring lesion,
It is important to know the progression or improvement of already known lesions.

[0005]

[Patent Document 1] JP-A-55-012144

[Patent Document 2] US Pat. No. 3,859,527

[0006]

However, there are cases in which important changes with time are overlooked even when the above-described comparative image reading is performed.

[0007] For example, in a chest radiographic image, normal structures such as bones, blood vessels, and bronchi are intricately intertwined,
Sometimes lesion shadows are camouflaged by these normal structure shadows and are difficult to find.

Further, the two radiographs often have finishes of considerably different densities and gradations due to variations in the X-ray exposure amount at the time of photographing, which is an obstacle to accurate comparison.

Further, in the above-described comparative image reading of film images, there is a problem in that it is inefficient to select the desired film from the film storage or the like, carry it to the reading room, and hang it on the Schaukasten each time.

The present invention has been made in view of the above problems, and it is an object of the present invention to improve diagnostic accuracy and diagnostic efficiency by presenting a time-series change portion of an image to a radiogram interpreter in an easy-to-see manner. .

[0011]

Therefore, in the image display device according to the invention of claim 1, a plurality of images each including a common subject portion stored in the storage device are read by the image reading means, and the image reading means is used. At least two images read from the storage device are simultaneously displayed on the same display screen or different display screens by the image display means.

In the image display device according to a second aspect of the present invention, the plurality of images each including the common subject portion are a plurality of time-series original image groups or at least one of the original images. And an image group including a time-series processed image corresponding to the original image.

The image display device according to the invention of claim 3 is
While a plurality of images each containing a common subject portion stored in the storage device are read by the image reading means,
The image processing means performs image processing using at least two images among the plurality of images read from the storage device to generate a processed image. Then, the image display means displays at least two images of the plurality of images including the plurality of original images read from the storage device by the image reading means and the processed image generated by the image processing means. ,
Display simultaneously on the same display screen or different display screens.

In the image display apparatus according to the invention of claim 4, in the invention of claim 2, the plurality of images respectively including the common subject portion are a plurality of time-series original image groups, and the processing is performed. The image is a time-series processed image.

In the image display device according to the fifth aspect of the present invention, at least one of the images displayed by the image display means is reduced and displayed by the pixel number reduction process.

In the image display device according to a sixth aspect of the present invention, another image (for example, a time-series processed image) is compared with the reduction ratio of at least one original image among the images displayed by the image display means. The reduction ratio is relatively large.

In the image display device according to the invention of claim 7, the image display means has a display screen having a resolution equal to or higher than the number of pixels of the image having the largest number of pixels among the displayed images. It was configured.

In the image display apparatus according to the invention of claim 8, the image display means has a plurality of display screens having mutually different resolutions, and at least one of the displayed images is displayed.
Display the original images on a display screen with a relatively high resolution,
The time-series processed image is displayed on a display screen having a relatively low resolution.

[0019]

According to the image display device of the first aspect of the present invention, a plurality of images each including a common subject portion stored in advance in the storage device are read out, and at least two read-out images are the same. Simultaneous display on a display screen or different display screens facilitates comparative image interpretation between a plurality of images each including a common subject portion, and simplifies the work required for image interpretation.

Here, the image means, for example, an image formed by shading of pixel values corresponding to the radiation transmission amount of the subject obtained by irradiating the human body as the subject once with radiation.

In the image display device according to the second aspect of the present invention, a comparative image reading between a plurality of time-series original images or a comparative image reading between an original image and a time-series processed image corresponding to the original image is performed. It will be easier.

In the image display device according to the third aspect of the present invention, the storage device stores a plurality of images each including a common subject portion, and image processing is performed using the plurality of images read from the storage device. The processed image is generated. Then, similarly to the configuration of claim 1, the read image and the processed image are displayed side by side at the same time.

In the image display device according to the fourth aspect of the present invention, the time-series processed image is generated by the image processing using the plurality of time-series original images, and the original image and the time-series processed image can be easily compared. You can do it.

In the image display device according to the fifth aspect of the present invention, at least one of the display images is reduced and displayed, and particularly when a plurality of images are simultaneously displayed on the same display screen, comparative interpretation is easy. Enabled to display in various forms.

In the image display apparatus according to the sixth aspect of the present invention, the reduction ratios of the plurality of images displayed simultaneously are made different, and, for example, the reference image is displayed in a relatively large size to ensure the interpretability. Images for reference (eg, time-series processed images or past time-series images) are displayed relatively small so that the display screen can be effectively used.

In the image display device according to the invention of claim 7, a display screen having a resolution equal to or higher than the number of pixels of the image having the largest number of pixels among the images to be displayed is provided, and the display screen is particularly preferable. The image (for example, the latest image in the time series image) can be displayed by using all the stored pixel data, and the deterioration of the image quality due to the display can be suppressed.

In the image display device according to the invention of claim 8, when it is configured to have a plurality of display screens having mutually different resolutions, for example, an original image serving as a reference for medical diagnosis (of the time series images, The latest image) is displayed on the display screen with the higher resolution, and the time-series processed images used for diagnosis are displayed on the display screen with the lower resolution. In addition to securing the cost, the resolution of the display means is reduced to the necessary minimum to reduce the cost.

[0028]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below. 1, which shows a system configuration of an embodiment of an image display device according to the present invention, an image storage unit 1 (storage device).
Stores a plurality of pieces of radiation image data of a human body photographed for medical diagnosis, and is composed of a magneto-optical disk or the like.

The radiation image data is obtained by irradiating a silver salt film on which a radiation image is recorded with light from a light source such as a laser or a fluorescent lamp to obtain transmitted light of the silver salt film and photoelectrically converting the transmitted light. Or the radiation that has passed through the subject is absorbed by the phosphor, and then the phosphor is excited by, for example, light or heat energy to absorb the radiation energy accumulated by the absorption. It may be one obtained by emitting it as fluorescence and photoelectrically converting this fluorescence.

An image information storage unit 2 is provided in addition to the image storage unit 1, and the image information storage unit 2 stores various information about each image stored in the image storage unit 1. , For example, shooting date, part, shooting conditions,
The image processing conditions, information about the subject, and the like, information about alignment processing between images obtained by photographing the same region of the same subject, and detection results of abnormal shadows are stored.

The position alignment information means at least one of a plurality of images including a common subject part so that the position of the common subject is relatively matched. This is information for coordinate conversion processing. Relative positional deviation due to the positioning of the subject at the time of shooting and the difference in the X-ray incident direction is corrected by coordinate conversion based on the alignment information to obtain a plurality of images. It is possible to superimpose image parts corresponding to the same anatomical structure of.

The image data stored in the image storage unit 1 and various incidental information stored in the image information storage unit 2 are collated and read by the image management unit 3. There is.

However, the image information storage unit 2 may be omitted and the image data and various information corresponding to each image may be paired and stored in the image storage unit 1. The stored data in the image storage unit 1 and the image information storage unit 2 is read by the image management unit 3 (image reading means) at any time by arbitrarily selecting a read image by the console 4. The read image data is subjected to image processing in the image processing unit 5 (image processing means) as necessary, and then displayed on the image display unit 6 composed of a CRT so as to read the radiation image.

Therefore, it is not necessary to search for a target film and hang it on the Schaukasten, which is the case when the radiographic film is read using the Schaukasten, and it is possible to perform an efficient image reading work.

The system of this embodiment is provided with two image display units A and B (image display means) each having an image display unit 6, and each image display unit A and B displays an image. In addition to the section 6, an image memory 7 and a display control section 8 are provided.

The image data read from the image storage unit 1 is temporarily stored in the image memory 7a of the image display unit A, and when the image is displayed using the image display unit B as well, the transfer control unit 9 is used. The image data is transferred from the image memory 7a to the image memory 7b under the control of.

That is, since the two display units A and B are provided, it is possible to display at least two different images at the same time, and the configuration may be provided with three or more display units.

The transfer control section 9 transfers the image data in accordance with the display format instruction given through the operator console 4. The display format instruction is also sent to the display control section 8a of the image display unit A. After that, it is controlled by the transfer control unit 9 and is also instructed to the other display control unit 8b.

Then, the display control section 8 processes the image data output to the image display section 6 in order to display the image in accordance with the designated display format. The processing of the image data includes gradation conversion such as enlargement / reduction processing for adapting the image to a specified display size, and window processing for adapting the gradation of the image to the luminance characteristic of the display device. Be done.

The enlargement / reduction processing, gradation conversion and the like may be performed in the image processing section 5 before the image is transferred to the image memory. By the way, with respect to a subject who is regularly radiographed by, for example, a regular medical examination, a time-series image sequence (hereinafter referred to as a time-series image) for each subject is completed.

Then, by performing difference processing (time series processing) between a plurality of radiographic images of the same portion (eg, chest) of the same subject imaged at different times in this way, there is no change in normal structure. It is possible to selectively emphasize the temporal change of the subject by canceling the shadow, and by displaying the difference image (time-series processed image) together with the original image, it is possible to detect a newly generated lesion or a lesion with a changed medical condition. You can prevent oversight.

Therefore, in this embodiment, the difference processing is performed in advance on the time-series image (original image) and the difference image (time-series processed image) is stored in the storage unit 1 together with the original image, or , Multiple time series images (original images)
Is read from the storage unit 1, the image processing unit 5 (time-series processing unit) newly generates the difference image (time-series processed image) based on these, and the time-series processed image is presented together with the original image. , So as not to overlook important changes over time.

The difference processing is performed, for example, as shown in the flowchart of FIG. First, preprocessing (S3, S4) is performed on each of the two time-series images (1) and (2) (S1, S2).

The pre-processing is an image reduction processing for simplifying the calculation of the difference processing, and for example, pixel thinning-out or averaging processing is performed. As for the numbers given to the time-series images, the newest one is given (1), and the numbers will increase as the numbers get older.

When the pre-processing is completed, a positioning process is performed to match the relative displacement of the object portion between the images due to the positioning of the object at the time of photographing and the difference in the X-ray incident direction (S5). .

The above-mentioned alignment processing is performed in Japanese Patent Publication No. 61-14553.
It can be carried out using various known methods such as those disclosed in JP-A Nos. 63-278183 and 1-70236.

Specifically, for example, the positional deviations of the portions corresponding to each other between the two images are obtained by linear approximation, and the non-linear positional deviation correction function between the two images is obtained from the obtained positional deviation amount. Done.

Further, after the rough alignment is performed based on the externally input parameter, the displacement amount may be calculated by the cross-correlation method for each corresponding region to correct the distortion.

The information on the alignment includes, for example, the parallel movement amount, the combination of the parallel movement amount and the rotation amount, the degree of the polynomial (in the case of polynomial conversion), the movement amount in the X direction and the movement amount in the Y direction for all pixels. And a movement amount in the X direction and a movement amount in the Y direction with respect to the representative pixel.

When the alignment process is completed, a difference process (S6) for obtaining the difference of the image data between the corresponding pixels of the two time-series images is executed. When the difference image is obtained, the gradation process and the like are subsequently performed. After the post-processing (S7) is performed, finally, a difference image obtained based on the time-series image (a time-series difference image as one kind of the time-series processed image) is set (S8).

As shown in the flow chart of FIG. 3, just before (or immediately after) the position adjustment process (S5), the density / gradation correction for adjusting the density / gradation of the entire image to the standard density / gradation characteristics. You may make it perform a process (S5 ').

Specifically, the density / gradation correction processing as disclosed in US Pat. No. 5,224,177 can be used.
Alternatively, a method may be used in which the image is divided into a plurality of small areas and the pixel values of one image are corrected so that the statistical values of the pixel values in the corresponding small areas are equal.

An average value, a variance value or the like is used as the statistic. Here, either one of the temporal difference image and the original image is selectively read from the storage unit 1 and only one of the two images is displayed on the image display unit 6,
Alternatively, when the image processing unit 5 is configured to display only the time-dependent difference image when the time-dependent difference image is generated, the time-dependent change portion observed in the time-dependent difference image can be immediately confirmed on the original image. The diagnostic accuracy and efficiency are poor.

Therefore, in the present embodiment, the time-series processed image (time difference image) and the original image (time-series image) are simultaneously displayed on the same display screen or different display screens. Makes it easier to compare with the original image,
As a result, the time-varying portion observed in the time-series processed image can be immediately confirmed on the original image.

Specifically, as shown in FIG. 4, for example, the original image (1) is displayed on the image display portion 6a of the image display unit A.
While the (latest image in the time-series image) is displayed on the display screen, the time-series processed image (temporal difference) is displayed in the image display portion 6b of the other unit B arranged side by side in the image display portion 6a. Image) is displayed on the display screen, and at the same time, the original image and the time-series processed image are displayed on different display screens so that they can be compared.

As a result, when a time-varying portion is observed based on the time-series processed image (time difference image), that portion can be immediately confirmed on the original image displayed next to it. Here, the time-series processed image is to be displayed for the purpose of finding the part where the time-dependent change occurs, and the time-series processed image roughly interprets the presence or absence of the time-dependent change and its position, and Diagnosis is performed by reading in detail the portion of the original image that is predicted to have changed over time.

Therefore, the image display unit 6 for displaying the original image
It is desirable that the resolution of a is equal to or larger than the number of pixels of the original image and the original image is displayed without deterioration.
Since the time-series processed image is displayed in order to roughly know the presence or absence of a time-varying part and its position,
It does not require the high resolution required for the display screen on which the original image is displayed.

Therefore, the resolution of the image display unit 6a preset for displaying the original image is equal to or more than the number of pixels of the original image, but the time-series processed image (or / and the past time-series image) is used. The image display unit 6a preset to display the image) is the image display unit 6a.
One having a lower resolution or one having a smaller screen size than the image display unit 6a may be used.

If the image display section 6a has a high resolution, fine images can be displayed, and the loss of image quality is small even if a plurality of reduced images are displayed side by side on the same screen.

Further, by displaying the time-series processed images on the display screen having a relatively low resolution, it is possible to detect a temporal change portion without being affected by the shadow of the fine normal structure. Further, the cost can be reduced by not unnecessarily requesting the image display section 6b to have an excessive resolution.

Specifically, a CRT is used as the image display unit 6a.
It is preferable to use a scanning line 1000, which is known as a high-definition CRT for medical use.
It is more preferable to use a CRT of this system or higher.

As the image display section 6b, it is preferable to use a CRT, a plasma display, a liquid crystal display or the like. By the way, the display modes are as shown in FIGS.
As shown in, the original image and the time-series processed image may be simultaneously displayed on the same display screen on the image display unit 6a side.

In the examples shown in FIGS. 5 and 6, both the original image and the time series processed image are reduced to the same size and displayed on the same display screen. In the example shown in FIG. The original image and the time series processed image are displayed side by side on the display screen of the unit 6a. In the example shown in FIG. 6, the original image is on the upper side and the time series processed image is on the lower side of the vertically long display screen. Is displayed.

Further, in the examples shown in FIGS. 7 and 8, the reduction ratio of the time-series processed image is relatively increased with respect to the original image, and the images are displayed side by side on the same display screen of the image display unit 6a. Yes, in the example shown in FIG. 7, two images having different image sizes (reduction ratios) are displayed side by side in the left-right direction,
In the example shown in FIG. 8, the original image is displayed on the upper side of the vertically long display screen, and the time-series processed image with a large reduction ratio is displayed on the lower side of the original image so that a part thereof overlaps the original image. ing.

With respect to the time-series images, it is not necessary to read the fine shadows, and it may hinder the detection of the time-varying portion. Therefore, there is no problem even if the display is reduced at a larger reduction ratio as described above. Further, by increasing the reduction rate, fine shadows unnecessary for observing the time-varying portion are crushed and the time-varying portion can be easily detected.

Further, in the example shown in FIG. 9, not only the latest original image (time series image) (1) but also the two original images (1), ( Both are displayed at the same time.

That is, in the example shown in FIG. 9, the image display unit 6a
, The latest original image (1) is displayed without being reduced, while the image display unit 6b uses the previously captured original image (2) and two original images (1) and (2). The time-series processed images (temporal difference images) generated by the above are reduced and displayed side by side in the vertical direction.

Further, in the example shown in FIG. 10, the latest original image is displayed on the image display section 6a without being reduced as in the example shown in FIG. 9, but it is different in the image display section 6b.
Two time-series processed images generated based on a combination of two time-series images are arranged vertically and displayed in a reduced size.

The upper image of the two time-series processed images displayed on the image display section 6b is a difference image between the latest original image (1) and the previous original image (2), and the lower image. The images are the latest original image (1) and the previous original image (3)
By displaying these two time-series processed images, the change of the subject with time from the time of the previous shooting to the latest shooting, and the change of the subject with time from the time before the last shooting to the latest shooting are displayed. Can also be presented.

Further, in the example shown in FIG. 10, the image display section 6b may be configured to display the original image (2) and / or the original image (3) together with the two time-series processed images in a reduced size. On the other hand, in the example shown in FIG. 11, only the original image (1) is displayed on the image display unit 6a without being reduced, and the latest original image (1) and the previous original image (2) are displayed on the image display unit 6a. As a time-series processed image (temporal difference image) generated by the difference processing of (1) and (2), two images having different processing conditions are vertically arranged and displayed in a reduced size.

As the processing condition, for example, one may be a normal difference image and the other may be an image obtained by inverting the difference image in black and white. Due to such display, the time-varying portion is black and white. This makes it easier to detect a time-varying portion based on the time-series processed image.

Further, in the density / gradation correction processing performed before the difference processing, two time-series processed images having different standard densities and standard gradations may be arranged and displayed simultaneously. As compared with the case where a single time-series processed image is displayed, it becomes easier to detect a time-varying portion.

The display contents as shown in FIGS.
Using only the display screen of the image display unit 6a, for example, FIGS.
The configuration may be performed as shown in FIG. 14, or conversely, three image display units (image display units 6) may be provided, and the display screens of the image display units 6 are respectively shown in FIGS. 9 to 11. The three images may be individually displayed.

As shown in FIGS. 5 to 14, if the image is displayed in a reduced size, high-speed image display is possible and a plurality of images to be used as a reference for diagnosis based on the latest original image are displayed. , Can be displayed simultaneously without using many display screens.

Further, the reduced display makes it possible to bring the display positions of the images close to each other, so that the line-of-sight movement is small and the observation is easy. As the processing for reducing the number of pixels for reduced display, thinning processing or averaging thinning processing can be used.

When the reduction rate is not an integer, interpolation reduction processing such as linear interpolation may be used. In the above-described embodiment, for example, two images selected from a plurality of time-series images can be simultaneously displayed on the image display units 6a and 6b, respectively. The time-series processed image may be selectively read or generated based on observation.

[0077]

As described above, according to the image display device of the first and second aspects of the present invention, a plurality of images each including a common subject portion are simultaneously displayed on the same display screen or different display screens. This facilitates comparative image interpretation between multiple time-series images or between the original image and the time-series processed image, and simplifies the work required for image interpretation. There is an effect that can be done.

According to the image display device of the third and fourth aspects of the present invention, the processed image is generated from the plurality of images each including the common subject portion, and the processed image and the original image are displayed at the same time. It becomes possible to compare an image and an original image. Especially, when the time-series image is image-processed to generate a time-series processed image, only the information of the time-series image is stored. Also, there is an effect that it is possible to present a time-series image that is useful for preventing missing of a time-varying portion together with the original image.

According to the image display device of the fifth aspect of the present invention, it is possible to simultaneously display a plurality of images on the same display screen by reducing at least one of the display images. There is.

According to the image display device of the sixth aspect of the present invention, the reduction ratios of the plurality of images displayed at the same time are made different, and, for example, the reference image is displayed in a relatively large size to ensure the interpretability. The images used as reference levels (for example, time-series processed images or past time-series images) are displayed in a relatively small size, and the display screen can be effectively used.

According to the image display device of the seventh aspect of the present invention, by providing a display screen having a resolution equal to or higher than the number of pixels of the image having the largest number of displayed images, it is possible to particularly interpret the image. The image serving as the reference can be displayed without deterioration, and the diagnostic accuracy can be maintained.

According to the image display device of the eighth aspect of the present invention, for example, the original image (the latest image among the time-series images) serving as a reference for medical diagnosis is displayed on the display screen with the higher resolution. By displaying the time-sequentially processed images used as a reference for diagnosis on the display screen with the lower resolution, while ensuring diagnostic performance based on the interpretation of the original image,
There is an effect that the resolution of the display means can be minimized to reduce the cost.

[Brief description of drawings]

FIG. 1 is a system configuration diagram of an embodiment of the present invention.

FIG. 2 is a flowchart showing a state of difference processing in the embodiment.

FIG. 3 is a flowchart showing how difference processing is performed in the embodiment.

FIG. 4 is a diagram showing an example of a display form of an original image and a time-series processed image.

FIG. 5 is a diagram showing an example of a display form of an original image and a time-series processed image.

FIG. 6 is a diagram showing an example of a display form of an original image and a time-series processed image.

FIG. 7 is a diagram showing an example of a display form of an original image and a time-series processed image.

FIG. 8 is a diagram showing an example of a display form of an original image and a time-series processed image.

FIG. 9 is a diagram showing an example of a display form of an original image and a time-series processed image.

FIG. 10 is a diagram showing an example of a display form of an original image and a time-series processed image.

FIG. 11 is a diagram showing an example of a display form of an original image and a time-series processed image.

FIG. 12 is a diagram showing an example of a mode in which three images including an original image are displayed on one screen.

FIG. 13 is a diagram showing an example of a mode in which three images including an original image are displayed on one screen.

FIG. 14 is a diagram showing an example of a form in which three images including an original image are displayed on one screen.

[Explanation of symbols]

1 ... Image storage unit 2 ... Image information storage unit 3 ... Image management unit 4 ... Operation console 5 ... Image processing unit 6a, 6b ... Image display section 7a, 7b ... Image memory 8a, 8b ... Display control unit 9 ... Transfer control unit A, B ... Image display unit

Continued front page    (72) Inventor Hisa Yonekawa             Konica Stock, 1 Sakura-cho, Hino City, Tokyo             In the company (72) Inventor Jun Kido             Konica Stock, 1 Sakura-cho, Hino City, Tokyo             In the company (72) Inventor Hitoshi Yoshimura             Konica Stock, 1 Sakura-cho, Hino City, Tokyo             In the company F-term (reference) 2H013 AC20                 4C093 AA27 CA18 CA21 CA50 EE01                       FD07 FF08 FF13 FF32 FF34                       FF37 FG08 FH02 FH04 FH09                 5B057 AA08 CA08 CA12 CA16 CB08                       CB12 CB16 CD05 CE08 DA07                       DB02 DC32

Claims (8)

[Claims] 1. An image reading unit for reading a plurality of images each containing a common subject portion stored in a storage device, and at least two images among the plurality of images read by the image reading unit are displayed in the same display. An image display device, comprising: an image display means for simultaneously displaying on a screen or a different display screen. 2. A plurality of images each including the common subject portion are a plurality of time-series original image groups, or at least one of the original images and a time-series processing corresponding to the original images. The image display device according to claim 1, wherein the image display device is an image group including an image. 3. An image reading means for reading a plurality of images each containing a common subject portion stored in a storage device, and an image using at least two images of the plurality of images read by the image reading means. Image processing means for performing processing to generate a processed image; at least two of a plurality of images including the plurality of images read by the image reading means and the processed image generated by the image processing means An image display device comprising: an image display means for displaying images on the same display screen or different display screens simultaneously. 4. The plurality of images respectively including the common subject portion are a plurality of time-series original image groups, and the processed image is a time-series processed image.
The image display device described. 5. The image according to claim 1, wherein at least one image among the images displayed by the image display means is reduced and displayed by a pixel number reduction process. Display device. 6. The reduction rate of at least one original image among the images displayed by the image display means is set to be relatively large compared to the reduction rate of the other image. The image display device described. 7. The image display means has a display screen having a resolution equal to or higher than the number of pixels of the image having the largest number of pixels among the displayed images. The image display device according to any one of 1. 8. The image display means has a plurality of display screens having mutually different resolutions, and displays at least one original image of the displayed images on a display screen having a relatively high resolution, The image display device according to claim 1, wherein the time-series processed image is displayed on a display screen having a relatively low resolution.