JP5130028B2 - Image display device - Google Patents

Description

  The present invention relates to an image display device that displays a high-resolution image.

  Diagnostic images taken with medical diagnostic equipment such as X-ray diagnostic equipment, MRI (magnetic resonance imaging) diagnostic equipment, and various CT (computed tomography) equipment are usually light such as X-ray film and other film photosensitive materials. It is recorded on a transmissive image recording film and reproduced as a light transmissive image. The film on which the diagnostic image is reproduced is set in an observation device called a schaukasten, and is observed in a state where light is irradiated from the back side, and diagnosis is performed.

  In recent years, various medical diagnosis / measurement devices have proposed methods for observing and diagnosing images displayed on a monitor such as a CRT display or LCD (liquid crystal display) without being output to film. ing.

  Here, the medical image needs to display a high-resolution and high-resolution image for accurate diagnosis. For this reason, the data amount of one image data increases. Therefore, it takes time to transfer the image data, and it takes time to display the image after the transfer of the image data is started. Further, the image reproducibility is lowered and the image quality is deteriorated, so that the image data cannot be compressed and transmitted.

  On the other hand, Patent Document 1 describes an image processing apparatus that creates a plurality of types of image data with different resolutions, selects image data with a desired resolution, and transfers the selected image data. .

Moreover, although it is not a medical image, Patent Document 2 discloses a device that displays a moving image. However, the interest information regarding the region of interest of the transmission image transmitted from the transmission device is instructed, and the instructed region of interest is displayed in high resolution. Describes an image communication system to be displayed.
Further, in Patent Document 3, image data in the JPEG2000 code stream format is divided into one or a plurality of regions of interest by an extraction unit, and priorities are assigned to the regions of interest divided by a first rank setting unit. An image processing apparatus is described that transmits image data in order from image data of a region of interest with a high image quality. Further, it is described that image data having different resolutions depending on positions can be used as the image data.

JP 2002-15866 A Japanese Patent Laid-Open No. 06-319134 JP-A-2005-260319

  By transmitting image data based on an instruction from the display device as in the image processing device described in Patent Document 1, it is possible to select a resolution according to the display performance of the image display device, etc. more than necessary. High-resolution image data will not be sent, but in the case of a high-resolution image display device, it is necessary to transmit a large amount of image data, and it takes time to display an image after starting transmission There is.

  Moreover, the amount of image data to be transmitted can be reduced by displaying only a selected portion with high resolution as in the apparatus described in the cited document 2, and the display can be performed in a short time. However, in order to perform an accurate diagnosis of a medical image, it is necessary to display details other than the selected portion. Therefore, an accurate diagnosis cannot be performed even if only a part of the image is highly accurate.

  Furthermore, as in the apparatus described in the cited document 3, in the method of assigning priorities to each part of the image data, transmitting each part, and displaying from the image with the highest priority, in order to grasp the entire image Has the problem of having to wait until all images are displayed.

  As described above, in any apparatus, the entire image and the target part (affected part) can be grasped in a short time, and further, the whole can be diagnosed in detail. There is a problem that it is difficult to do.

  An object of the present invention is to solve the problems based on the above prior art, to grasp the entire image in a short time, and to appropriately grasp a notable part such as an affected part. Is to provide.

  In order to solve the above-described problem, a first aspect of the present invention is an image display device that displays an image, and includes a target image region detection unit that detects a target image region of image data, and has different resolutions from the image data. An image data processing unit having at least two or more image data and an image data generation unit that generates the highest resolution image data of only the target image region, and a transmission unit that transmits the generated image data; and An image display means having a receiving unit for receiving the transmitted image data and a display unit for displaying the image data received by the receiving unit, wherein the transmitting unit has the highest resolution only in the target image region. After transmitting the image data, low-resolution image data is transmitted, and then image data having a higher resolution than the low-resolution image data is transmitted. When the receiving unit receives the highest resolution image data and the lower resolution image data of only the target image area, the image display area displays the lowest resolution image only in the highest image resolution area, and then displays the lower resolution image. When the receiving unit receives image data having a higher resolution than the low-resolution image data, the image of the image data having a higher resolution than the low-resolution image data is displayed in an area other than the image attention area. An image display device is provided.

  In order to solve the above-described problem, a first aspect of the present invention is an image display device that displays an image, and includes a target image region detection unit that detects a target image region of image data, and has different resolutions from the image data. An image data processing unit having at least two or more image data and an image data generation unit that generates the highest resolution image data of only the target image region, and a transmission unit that transmits the generated image data; and A receiving unit that receives the transmitted image data, and an image display unit that includes a display unit that displays the image data received by the receiving unit, and the transmitting unit transmits the low-resolution image data; The highest resolution image data of only the target image area is transmitted, and then the image data having a higher resolution than the low resolution image data is transmitted. When the receiving unit receives the low resolution image data and the highest resolution image data of only the target image area, only the target image area displays the highest resolution, and the other areas display the low resolution image. When the receiving unit receives image data having a higher resolution than the low-resolution image data, the image of the image data having a higher resolution than the low-resolution image data is displayed in an area other than the image attention area. An image display device is provided.

Here, in the image display devices according to the first and second embodiments, the image data creation unit creates image data excluding the attention image region, and the transmission unit includes only the attention image region. It is preferable to transmit the image data excluding the target image area after transmitting the image data with the highest resolution.
Moreover, it is preferable that the said attention image area | region detection part detects the attention image area | region of the said image based on the information of the attention image area | region added to the said image data.

Moreover, it is preferable that the said attention image area | region detection part analyzes the said image data, and detects an attention image area | region.
It is preferable that the image display unit further includes a display image determination unit that selects image data to be displayed on the screen from the received image data for each position on the screen.
In the display unit, it is preferable that one pixel is composed of a plurality of sub-pixels, and a monochrome medical image is displayed.

  According to the present invention, a region other than the target image region is a low resolution image, and the target image region is displayed as a high resolution image, so that the entire image can be displayed in a short time, and the user grasps the entire image. can do. Furthermore, by displaying the attention image area as a high-resolution image, it is possible to appropriately grasp the attention portion. In addition, by receiving higher resolution image data, it is possible to grasp the entire image in more detail by making the display image higher resolution.

  An image display apparatus according to the present invention will be described in detail based on an embodiment shown in the accompanying drawings.

  FIG. 1 is a front view showing a schematic configuration of an embodiment of an image display device of the present invention, and FIG. 2 is an image diagram schematically showing image data processed by the data processing unit shown in FIG. 3A is a front view showing a schematic configuration of the display panel 34 of the image display means 14 of the image display device 10 shown in FIG. 1, and FIG. 3B shows one pixel of the display panel shown in FIG. It is an enlarged front view which expands and shows.

  The image display device 10 includes an image data processing unit 12 that processes medical diagnostic images into a displayable format and an image display unit 14 that displays image data transmitted (or transferred) from the image data processing unit 12. In the present embodiment, an example in which a display panel that displays one pixel by three subpixels is used as the image display unit 14 will be described.

  The image data processing unit 12 includes a data processing unit 20 that processes a medical diagnostic image into a displayable format, and a transmission unit 22 that transmits image data processed by the data processing unit 20 to the image display unit 14. Although not shown, the image data processing unit 12 further includes a data acquisition unit that acquires image data, and the acquired image is processed by the data processing unit 20. The data acquisition unit may be an imaging unit that captures an image for medical diagnosis, or may be a reception unit that receives image data transferred (transmitted) from an imaging device or a storage device.

  The data processing unit 20 includes a target image region detection unit 24 that detects a target image region from the acquired image data, and a plurality of image data having different resolutions from the acquired image data and the target image detected by the target image region detection unit 24. And an image data creation unit 26 that creates high-resolution image data of the region.

Target image area detection unit 24, as shown in FIG. 2, the target image region (ROI, region of interest) from the image data D by the image treatment unit 12 has acquired to detect the D _R.
Here, the target image region D _R in the medical image, a portion suspected cancer cells, a portion that would lesions such as aneurysms portion of the vessel, not in normal biological (healthy body) anomalous partial Is an image region including
The attention image area detection unit 24 compares the healthy body data serving as a reference (for example, image data and numerical data) with image data to be subjected to image processing, detects an abnormal part, and detects an abnormal part. , detecting the predetermined size of the area including the abnormal portion as target image region D _R.

Detection methods of the target image region D _R is, it is possible to use various detection methods, for example, a detection method as described in JP-A-3-236831. Specifically, a portion where the difference in brightness is more than a certain level or a portion where the brightness is more than a certain level is detected as an abnormal shadow portion from the shadow of the image data to be subjected to image processing. Next, the position of the bone part of the living body is specified from the reference data, and the bone part is removed from the abnormal shadow part. Then, the remaining abnormal shadow part is detected as an abnormal part.

Image data generating unit 26 includes an image processing unit 12 acquires image data to the image processing alms resolutions different image data, high-resolution image data of the target image region D _R detected in target image region detecting section 24 Create
Specifically, based on the display performance of the image display unit 14, the image data creation unit 26 displays high-resolution image data that can display a high-definition image with a large amount of data and a coarse image with a small amount of data. The low-resolution image data that will be created is created. The image data creation unit 26 adds metadata indicating resolution to each image data.
In this embodiment, a case where two image data of high resolution image data for displaying a high resolution image and low resolution image data for displaying a low resolution image is used will be described. One or more pieces of image data having an intermediate resolution between the image data and the low-resolution image data may be created, and image data having three or more resolutions may be created.

The image data creation unit 26 also creates attention image region image data obtained by extracting only the image of the attention image region detected by the attention image region detection unit 24 with high-resolution image data. Here, the target image area image data is created at the same resolution as the image data having the highest resolution among the image data of a plurality of resolutions created by the image data creation unit 26.
In addition, the image data creation unit 26 adds metadata indicating the attention image region image data and metadata indicating the position of the attention image region in the image to the generated attention image region image data.

Next, the transmission unit 22 determines the transmission order of the high resolution image data, the low resolution image data, and the target image area image data created by the data processing unit 20, and sequentially outputs the image data based on the determined transmission order. It transmits to the image display means 14.
Here, in this embodiment, the transmission part 22 transmits each image data in order of attention image area image data, low resolution image data, and high resolution image data.

  Next, the image display means 14 receives the image data transmitted from the transmission unit 22, temporarily stores the image data received by the reception unit 30, and displays the image data and the image displayed on the display unit The display control unit 32 determines a position for displaying data, and the display panel 34 displays image data transmitted from the display control unit 32.

  The reception unit 30 receives the image data transmitted from the transmission unit 20 and transmits it to the display control unit 32.

The display control unit 32 receives the image data transmitted from the receiving unit 30, detects the resolution of the image data from the metadata of the received image data, and whether or not the image data is attention image area image data, Image data to be displayed on the display panel 34 is determined based on the detected result. Further, the display control unit 32 transmits image data to the display panel 34 based on the determined result.
In the present embodiment, the display control unit 32 displays the target image region image data in the corresponding part when the reception of the target image region image data is completed, and then, when the reception of the low resolution image data is completed, A low resolution image is displayed in a portion other than the target image area. Thereafter, when the reception of the high resolution image data is completed, the high resolution image is displayed in the entire area.

  The display panel 34 is a liquid crystal display, and includes a plurality of pixels P arranged two-dimensionally as shown in FIGS. 3A and 3B. Each pixel P emits light of a predetermined gradation. It consists of subpixels p1, p2, and p3 that emit. The subpixels p1, p2, and p3 of each pixel P are arranged in one direction (A direction in FIG. 3A) in the order of the subpixel p1, the subpixel p2, and the subpixel p3. A subpixel p1 of an adjacent pixel is arranged on the surface opposite to p2. The subpixels p1, p2, and p3 have a rectangular shape with a length in the A direction and a length in the B direction, and the relationship between the length a and the length b is a: b = 1: 3. Further, in the B direction orthogonal to the A direction in FIG. 3, subpixels p1 of adjacent pixels are arranged above and below the subpixel p1, and similarly, subpixels p2 of adjacent pixels are arranged above and below the subpixel p2. The subpixels p3 of adjacent pixels are arranged above and below the subpixels p3.

The sub-pixels p1, p2, and p3 of each pixel P are connected to the display control unit 32, respectively, and emit light of gradation based on the image data supplied from the display control unit 32.
The display panel 34 displays an image by emitting light of gradation based on the supplied image data from each subpixel.
In addition, there is no restriction | limiting in particular in the liquid crystal display used for the display panel 34, The liquid crystal display used for various LCDs can be utilized. As the operation mode, various operation modes such as a TN (Twisted Nematic) mode, an STN (Super Twisted Nematic) mode, and an MVA (Multi-domain Vertical Alignment) mode can be used.

The image display device 10 is basically configured as described above.
Hereinafter, the operation of the image display device 10 will be described to describe the present invention in more detail.
Here, FIGS. 4A to 4D are image diagrams schematically showing images displayed on the display panel, respectively. Here, in the embodiment described below, a case will be described where the image data creation unit 26 creates four types of image data having different resolutions.

First, in the image data processing means 12, the attention image area detection unit 24 detects the attention image area from the acquired image data, and the image data creation section 26 creates attention image area image data.
Next, the image data processing means 12 is an image data creation unit 26 that uses high-resolution image data, low-resolution image data, medium- and high-resolution image data whose resolution is lower than that of high-resolution image data and higher than that of low-resolution image data, Image data of four resolutions of medium and low resolution image data having a resolution lower than that of the medium and high resolution image data and higher than that of the low resolution image data is created. The image data processing means 12 also includes metadata indicating the resolution for each image data, metadata indicating the image data of the target image region and metadata indicating the position of the target image region for the target image region image data. Is added.

Next, the transmission unit 22 determines the transmission order of the image data created by the image data creation unit 20, and transmits the image data to the reception unit 30 based on the determined order.
In the present embodiment, the transmission unit 22 transmits the image data to the reception unit 30 in the order of target image area image data, low resolution image data, medium / low resolution image data, medium / high resolution image data, and high resolution image data.

The receiving unit 30 of the image display unit 14 receives the target image area image data, the low resolution image data, the medium / low resolution image data, the medium / high resolution image data, and the high resolution image data transmitted from the image data processing unit 12. Thereafter, the receiving unit 30 transmits the received image data to the display control unit 32.
The display control unit 32 detects metadata added to the image data from the received image data, and determines image data to be displayed based on the metadata.

The display panel 34 displays an image of the image data determined by the display control unit 32.
Specifically, the display control unit 32 displays the target image area image data in the corresponding part when the reception of the target image area image data is completed, and then, when the reception of the low resolution image data is completed, A low resolution image is displayed in a portion other than the target image area. As a result, as shown in FIG. 4A, a high-resolution image is displayed only in the target image area on the display panel 34 at the time when reception of the low-resolution image data is completed, and low resolution is displayed in the other areas. Correct images are displayed.

  Thereafter, when the reception of the medium / low resolution image data is completed, the display control unit 32 displays the medium / low resolution image in a portion other than the target image area. Thereby, as shown in FIG. 4B, a high-resolution image is displayed only in the target image area on the display panel 34 at the time when the reception of the medium-low resolution image data is completed, and in the other areas, A medium-low resolution image having a higher resolution than a low-resolution image is displayed.

  After that, the display control unit 32 displays the medium / high resolution image in a portion other than the target image area when the reception of the medium / high resolution image data is finished. As a result, as shown in FIG. 4C, the display panel 34 at the time when the reception of the medium-high resolution image data is completed displays the high-resolution image only in the target image area, and the other areas include the medium-resolution image data. A medium-high resolution image having a higher resolution than a low-resolution image is displayed.

Thereafter, the display control unit 32 displays the high-resolution image in a portion other than the target image area when the reception of the high-resolution image data is finished. Accordingly, as shown in FIG. 4D, a high-resolution image having a higher resolution than the medium-high resolution image is displayed on the entire surface of the display panel 34 at the time when reception of the high-resolution image data is completed. The
The image display device 10 displays an image based on the image data created by the image data processing unit 12 on the display panel 34 of the image display unit 14 as described above.

In this way, the target image region is detected, and the target image region image data obtained by extracting the image of only the target image region with high resolution is generated. Based on the target image region image data and the low resolution image data with a small amount of data. By displaying the image, the entire image can be displayed in a short time, and the target image area can be diagnosed with a high-resolution image, and the positional relationship of the target image area in the entire image is also I can grasp it.
Furthermore, by sequentially transmitting image data of higher resolution images, displaying high resolution images, and displaying areas other than the target image area at higher resolutions, other areas after the diagnosis of the target image area are completed. Even an accurate diagnosis can be made.
As described above, according to the present invention, the user (doctor, imaging engineer, etc.) can quickly start diagnosis of the attention image area while grasping the overall outline, and during the diagnosis, the area other than the attention image area can be started. Therefore, an accurate diagnosis of the entire image becomes possible.
Further, since the image can be displayed in a short time without increasing the transmission speed of the image data, the above effect can be obtained without using expensive communication means and information processing apparatus as communication means and information processing apparatus. Can do.

Here, in the above-described embodiment, the low-resolution image data is transmitted from the transmission unit 22 after transmitting the target image area image data. However, the present invention is not limited to this, and after transmitting the low-resolution image data, The attention image area image data may be transmitted.
Even if the image data is transmitted in the above order, the entire image can be displayed in a short time, and the image of the image area of interest can be displayed with high resolution. Thereby, the effects of the present invention described above can be obtained.

  Alternatively, image processing may be performed on the image data to display a boundary line (for example, a red frame) that clarifies the boundary between the target image region and other regions. By displaying the boundary line, the image area of interest can be made clearer.

  Further, it is preferable that the image data creating unit creates the high-resolution image data having the highest resolution among the image data created at a plurality of resolutions and the target image area image data at the same resolution. Thereby, when the final image is displayed, the entire resolution can be made the same, and diagnosis can be facilitated.

In the above embodiment, the image data creation unit 26 creates image data of each resolution for the entire image region, and the display control unit 32 displays the image data to be displayed and its display based on the metadata of each image data. Although the area has been determined, it is preferable that the image data creation unit 26 creates image data of each resolution other than the attention image area image data as image data of a portion excluding the attention image area.
In this way, by removing the image data of the target image area from the image data of each resolution, the data amount of the image data transmitted from the transmission unit to the reception unit can be reduced, and the image is displayed in a shorter time. be able to. In addition, since the target image area can be displayed as a high-resolution image using the target image area image data, the image displayed even if the image data of the target image area is omitted from the image data of other resolutions. Can be the same image.
Furthermore, since it is not necessary to select and determine the display area and the image data to be displayed by the display control unit, the data calculation amount of the image display means can be reduced, and the image can be displayed in a shorter time.

In the above-described embodiment, the attention image area detection unit 24 automatically detects the attention image area by analyzing the image data. However, the present invention is not limited to this, and the image data is previously stored as metadata. It may be added.
Specifically, when the technician who took the medical image is taken to check the taken image (for example, to check whether the image has been taken to the extent that it can be examined), the region that has been determined to be the attention image region is designated. The position data of the area is added to the image data as the attention image area information. Note that if the technician who took the medical image is making a diagnosis using the same medical image other than at the time of checking the taken image, the information designated by the doctor who made the diagnosis is the attention image area. It can be information.
When the image display apparatus acquires the image data to which the attention image area information is added, the attention image area detection unit detects the area based on the attention image area information as the attention image area without analyzing the image data. To do.
In this way, by detecting the attention image area using the attention image area information, it is possible to detect the attention image area based on the previous examination, diagnosis, and observation. Thereby, it is possible to effectively utilize the examination, diagnosis, and observation of the image before, and more accurate diagnosis can be performed.
The attention image region detection unit may analyze the image data and detect both the attention image region as a result of the analysis and the region based on the attention image region information as the attention image region.

  Further, it is preferable that the resolution of the image data of each resolution is increased by transmitting only the difference from the image data of lower resolution and overwriting the previous image data.

For example, image data obtained by extracting only the subpixel p1 image data is generated as the low resolution image data, and only the subpixel p2 image data is generated as the medium resolution image data having a higher resolution than the low resolution image data. The extracted image data is created, and image data obtained by extracting only the p3 image data of the sub-pixel is created as high-resolution image data having a higher resolution than the medium-resolution image data. Note that the target image area image data is image data of p1, p2, and p3 of subpixels of the target image area.
These image data are created by the image data creation unit 26, and the transmission unit 22 transmits the target image area image data, the low resolution image data, the medium resolution image data, and the high resolution image data in the same manner as described above.

  When receiving the attention image area image data, the image display means 14 displays the image of the image data in the attention image area as described above. Further, when the low-resolution image data is transmitted, the image of the image data of the subpixel p1 is displayed on the subpixels p1, p2, and p3.

  Next, when receiving the medium resolution image data, the image display means 14 displays an image based on the low resolution image data on the subpixels p1 and p3, and displays an image based on the medium resolution image data on the subpixel p2. As a result, the image displayed on the display panel 34 has a higher resolution.

Further, when receiving the high resolution image data, the image display means 14 displays an image based on the low resolution image data on the subpixel p1, displays an image based on the medium resolution image data on the subpixel p2, and displays the image on the subpixel p3. An image based on the high resolution image data is displayed.
Thus, by making the image data of each resolution a difference from the previous image data, the amount of information of the image data can be further reduced, and the high resolution is displayed on the entire screen after the transmission of the image data is started. The time until the image is displayed can be shortened.

  Further, as in the above-described embodiment, one pixel can be expressed with gradations equal to or higher than the gradation of one subpixel by expressing the luminance of one pixel with three subpixels. That is, a high gradation image can be displayed by changing the resolution.

In addition, the subpixels p1, p2, and p3 of each pixel P are provided with different filters in each subpixel, and the intensity of light emitted by the subpixel, specifically, the width of the intensity of one gradation can be emitted. It is preferable to change the maximum intensity of light. For example, the width of the intensity of one gradation of the subpixel p2 may be maximized, and the intensity width of one gradation may be decreased in the order of the subpixel p1 and the subpixel p3.
In this way, by changing the intensity range of one gradation by subpixel, it becomes possible to display a higher gradation image with one pixel using three subpixels, resulting in a higher quality image. Can be displayed.
In this way, when the width of the intensity of one gradation differs depending on the subpixel, it is preferable to transmit in order from the image data of the phase of the subpixel having the larger width of one gradation.

  Note that the number of subpixels constituting one pixel is not particularly limited, but is preferably three subpixels. By making the number of subpixels three, each component of an RGB image display device for displaying a conventional color image can be used, and the manufacturing cost can be reduced.

  As described above, the image display device according to the present invention has been described in detail. However, the present invention is not limited to the above embodiment, and various improvements and modifications are made without departing from the gist of the present invention. Also good.

  For example, in the above embodiment, an image with higher resolution and higher resolution can be displayed, and the entire image can be suitably grasped even with image display based on one-third image data. Although the display panel which displays one by 3 subpixels was used, various display panels can be used as a display panel of an image display apparatus.

  In this embodiment, the monochrome image of the medical image has been described. However, the present invention is not limited to this, and various types of images for grasping the entire image in a short time and then displaying an image that requires detailed examination of the entire image can be displayed. It can be used as an image display device.

It is a block diagram which shows schematic structure of one Embodiment of the image display apparatus of this invention. It is an image figure which shows typically the image data processed with a data processing unit. (A) is a front view which shows schematic structure of the display panel shown in FIG. 1, (B) is an enlarged front view which expands and shows one pixel of the display panel shown to (A). (A)-(D) are the image figures which show typically the image displayed on a display panel, respectively.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Image display apparatus 12 Image data processing means 14 Image display means 20 Data processing unit 22 Transmission part 24 Attention image area detection part 26 Image data creation part 30 Reception part 32 Display control part 34 Display panel P Pixel p1, p2, p3 Sub pixel

Claims (7)

An image display device for displaying an image,
An attention image region detection unit for detecting an attention image region of image data, and an image data creation unit for generating at least two or more image data having different resolutions from the image data and the highest resolution image data of only the attention image region And an image data processing means having a transmission unit for transmitting the created image data,
An image display means including a receiving unit that receives the image data transmitted from the transmitting unit, and a display unit that displays the image data received by the receiving unit;
The transmitting unit transmits the highest resolution image data of only the target image region, and then transmits the lower resolution image data, and then transmits the higher resolution image data than the lower resolution image data,
When the receiving unit receives the highest-resolution image data and the low-resolution image data of only the target image region, the display unit has the highest resolution only in the target image region, and the region other than the target image region. Displays a low-resolution image, and after that, when the receiving unit receives image data having a higher resolution than the low-resolution image data, an image having a higher resolution than the low-resolution image data in an area other than the image attention area. An image display device displaying an image of data. An image display device for displaying an image,
An attention image region detection unit for detecting an attention image region of image data, and an image data creation unit for generating at least two or more image data having different resolutions from the image data and the highest resolution image data of only the attention image region And an image data processing means having a transmission unit for transmitting the created image data,
An image display means including a receiving unit that receives the image data transmitted from the transmitting unit, and a display unit that displays the image data received by the receiving unit;
The transmission unit transmits low-resolution image data, then transmits the highest-resolution image data of only the target image region, and then transmits image data having a higher resolution than the low-resolution image data,
When the receiving unit receives the low-resolution image data and the highest resolution image data of only the target image area, the display unit has the highest resolution only in the target image area, and the lower resolution in the other areas. When an image is displayed and then the receiving unit receives image data having a higher resolution than the low-resolution image data, an image of image data having a higher resolution than the low-resolution image data is displayed in an area other than the image attention area. An image display device characterized by displaying. The image data creation unit creates image data excluding the attention image region,
The image display device according to claim 1, wherein the transmission unit transmits image data excluding the target image area after transmitting the highest resolution image data of only the target image area.   The image display device according to claim 1, wherein the target image area detection unit detects a target image area of the image based on information of a target image area added to the image data.   The image display device according to claim 1, wherein the target image area detection unit analyzes the image data and detects a target image area.   The image display device according to claim 1, wherein the image display unit further includes a display image determination unit that selects image data to be displayed on the screen from received image data for each position on the screen.   The image display device according to claim 1, wherein one pixel includes a plurality of subpixels and displays a monochrome medical image.