JP2015150001A - Information processing device, information processing method, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To determine whether or not a transmitted partial image is correct in transmitting a partial image of a photographed X-ray image and restoring an entire image from the transmitted partial image.SOLUTION: It is determined whether or not the similarity between a first received partial image 210a and subsequently received partial images 210b-210d of partial images 210a-210d of an X-ray image 200 is equal to or less than a threshold value. When the similarity is more than the threshold value, it is determined that the first received partial image 210a and the partial image received this time are not similar, and re-transmission of the partial image is requested.

Description

  The present invention is suitable for use in handling a radiographic image in units of partial images.

  For X-ray imaging for the purpose of medical diagnosis, a film screen system combining an intensifying screen and an X-ray photographic film is often used. X-rays that have passed through the subject contain internal information about the subject. In this film screen system, an X-ray image is formed on an X-ray film by converting X-rays into visible light proportional to the intensity of X-rays using an intensifying screen and exposing the converted visible light to the X-ray film. To do.

  In addition, X-rays are converted into visible light proportional to the intensity of X-rays by a phosphor, the converted visible light is converted into an electrical signal by a photoelectric conversion element, and the electrical signal is converted from analog to digital by an A / D converter. A digital X-ray imaging apparatus is used. As a photoelectric conversion element of a flat panel detector (FPD) which is one of the digital X-ray imaging apparatuses, there is one using amorphous silicon. Compared to the conventional digital X-ray imaging apparatus using an image intensifier, the digital X-ray imaging apparatus using a flat panel detector (FPD) has a large screen, a thin and light weight. Can be formed. Therefore, a photographing method similar to that used in the conventional film screen system can be used.

  In medical diagnosis using an X-ray image obtained by FPD, a radiographer who is an operator of a digital X-ray imaging apparatus is usually different from an interpreting doctor who is a diagnostician. First, the radiographer confirms whether X-ray imaging conditions such as dose and tube voltage are set appropriately and that diagnostic X-ray images are properly captured using a simple monitor in the digital X-ray imaging system. And image processing parameters are determined. Then, the radiologist performs an operation for printing an X-ray image on a film imager or transmitting it to an external image storage device such as a PACS (Picture Archiving and Communication System).

Next, the doctor interpreting the image by observing the X-ray image in detail by applying the printed X-ray image to Schaukasten or displaying the entire image on a large-screen / high-definition monitor for interpretation. Do.
Therefore, it is redundant to use all the X-ray images for the X-ray image confirmed by the radiologist and the image analysis thereof. Generally, on a simple monitor in a digital X-ray imaging apparatus, a reduced image obtained by reducing an X-ray image is displayed, or when determining an image parameter, a reduced image obtained by reducing the X-ray image is displayed. It is done to use.
Here, when a reduced image is created by calculation from all images composed of all pixels of the X-ray sensor, it takes time to transfer the image, so a high-speed I / F is required, and the product cost is increased. It was.

Therefore, Patent Document 1 displays a reduced image at a high speed on a simple monitor in the digital X-ray imaging apparatus by thinning out some pixels of the X-ray sensor and transmitting in advance. A method of using for determination of success or failure and determination of image processing parameters has been proposed.
In this way, when only a reduced image is received first and displayed on a simple monitor in the digital X-ray imaging apparatus, the operator does not check all images that arrive later, but communication errors and hardware of the X-ray sensor Occasionally, the entire image may be damaged due to troubles. Therefore, by creating a thinned image again from all images and comparing the created thinned image with the previously received thinned image, it is confirmed that the previously received thinned image can be reproduced from all the images received later. .

In recent years, there are cases where radio is used for transmission in order to improve portability. The wireless transmission rate is also improved, but the value is smaller than that of wired communication, while the resolution of images is increasing. For this reason, there is a tendency that an increase in time required for displaying an image after photographing, that is, a delay in displaying an X-ray image is likely to occur.
From this point of view, Patent Document 2 discloses a method of displaying a reduced image sampled for speeding up in advance. Further, Patent Document 3 realizes that the display of a high-definition all image displayed after displaying a sampling image is also speeded up. In these techniques, the entire image is divided into a plurality of partial images, and each partial image is used as a sampling image.

Japanese Patent No. 4313985 JP 2006-26083 A JP 2012-200287 A

However, in the techniques described in Patent Documents 2 and 3 described above, the entire image is restored from each partial image obtained by dividing the entire image including all pixels, so that another partial image can be restored from another partial image. It is not possible to confirm that all reconstructed images are accurate. In particular, when wireless is used to transmit an image from a digital X-ray imaging apparatus to an information processing apparatus, the frequency of partial images not being correctly transferred due to a transfer error is increased compared to wired communication, and the partial images are transferred correctly. It is important to check whether or not
The present invention has been made in view of such problems, and when transmitting a partial image of a captured radiographic image and restoring the entire image from the transmitted partial image, the transmitted partial image is correct. It is an object to be able to determine whether or not it is a thing.

  The information processing apparatus of the present invention extracts pixels of a plurality of regions distributed in a radiation image in units of one pixel or a plurality of adjacent pixels based on a predetermined extraction pattern, and the radiation of the extracted pixels An information processing apparatus that communicates with a radiation imaging apparatus that generates a plurality of partial images by arranging the extracted pixels according to positions in the image, and receives the plurality of partial images from the radiation imaging apparatus And calculating a similarity between one image obtained from one or a plurality of partial images received by the receiving unit and the other image which is another partial image received by the receiving unit Determination means for determining whether the one image and the other image are similar based on the similarity calculated by the calculation means, An output means for outputting a signal for retransmitting either the one image or the other image when the determination means determines that the one image is not similar to the other image; It is characterized by having.

  According to the present invention, when transmitting a partial image of a captured radiographic image and restoring the entire image from the transmitted partial image, it is determined whether or not the transmitted partial image is correct. it can.

It is a figure which shows the structure of a radiographic imaging system. It is a figure which shows notionally the method of the process with respect to an X-ray image. It is a flowchart explaining operation | movement of a radiographic imaging system.

Hereinafter, various embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a diagram illustrating an example of a configuration of a radiographic image capturing system.
In FIG. 1, the radiographic imaging system includes an X-ray imaging apparatus 10 that is an example of a radiographic apparatus and an information processing apparatus 20.
The X-ray tube 101 emits X-rays toward a bed on which a subject is laid. The X-ray detector 102 is disposed at a position facing the X-ray tube 101 via the bed, receives X-rays emitted from the X-ray tube 101 toward the bed, and acquires an X-ray image. In the present embodiment, the X-ray detector 102 is configured using an FPD (Flat Panel Detector).
The captured image holding unit 103 holds the X-ray image detected by the X-ray detector 102.

The partial image generation unit 104 generates a plurality of partial images having a resolution lower than that of the X-ray image, from the X-ray images held in the captured image holding unit 103.
FIG. 2 is a diagram conceptually illustrating an example of a processing method for an X-ray image.
In FIG. 2, a case where four partial images 210a to 210d are generated from the X-ray image 200 is shown as an example. An image in which a plurality of pixels in odd-numbered columns and odd-numbered rows of the X-ray image 200 are arranged without changing their relative positional relationship is a partial image 210a, and a plurality of even-numbered columns and even-numbered rows in the X-ray image 200 An image in which pixels are arranged without changing their relative positional relationship is a partial image 210b. The partial image 210c is an image in which a plurality of pixels in even columns and odd rows in the X-ray image 200 are arranged without changing their relative positional relationship. Furthermore, an image in which a plurality of pixels in odd-numbered columns and even-numbered rows of the X-ray image 200 are arranged without changing their relative positional relationship is a partial image 210d. Thus, the sizes of all the partial images 210a to 210d are the same.

The captured partial image holding unit 105 holds the partial images 210 a to 210 d generated by the partial image generation unit 104.
The partial image transmission unit 106 sequentially transmits the partial images 210 a to 210 d held in the captured partial image holding unit 105 via the network 121. Here, it is assumed that the partial image transmission unit 106 transmits partial images in the order of the partial image 210a, the partial image 210b, the partial image 210c, and the partial image 210d.

The network 121 is a wireless communication network that wirelessly transmits data such as image data. However, the network 121 is not limited to a wireless communication network, and may be a wired communication network that transmits data by wire.
The units 101 to 106 of the X-ray imaging apparatus 10 are connected via an internal bus 119 so that they can communicate with each other.

The partial image receiving unit 107 receives the partial images 210 a to 210 d transmitted from the partial image transmitting unit 106 via the network 121.
The reception partial image holding unit 108 holds the partial images 210 a to 210 d received by the partial image reception unit 107.
The image analysis unit 109 analyzes the partial image 210a initially held in the reception partial image holding unit 108 and the whole image restored by the whole image restoration unit 111 described later with respect to the same X-ray image 200, and provides a diagnostic image. Image processing parameters used for processing are determined.

The image processing parameter holding unit 110 holds the image processing parameter determined by the image analysis unit 109.
The whole image restoration unit 111 combines the partial images of the same X-ray image 200 held in the reception partial image holding unit 108, and restores the whole image from the partial images 210a to 210d.
The received whole image holding unit 112 holds the whole image restored by the whole image restoring unit 111.

The image processing unit 113 converts the image processing parameters held in the image processing parameter holding unit 110 into the partial images 210 a to 210 d held in the reception partial image holding unit 108 and the whole image held in the reception whole image holding unit 112. And apply image processing.
The post-processing partial image holding unit 114 holds a partial image obtained by performing image processing on the partial image 210a first held in the reception partial image holding unit 108 for the same X-ray image 200 by the image processing unit 113. .
The processed whole image holding unit 115 holds the whole image that has been subjected to image processing by the image processing unit 113.

The image display unit 116 displays a partial image after image processing held in the post-processing partial image holding unit 114 and a whole image after image processing held in the post-processing whole image holding unit 115.
The partial image similarity determination unit 117 determines the similarity of each partial image held in the reception partial image holding unit 108.

The partial images 210a to 210d shown in FIG. However, since the pixels at the same position in the partial images 210a to 210d are adjacent to each other in the X-ray image 200, the pixel values of these pixels are close to each other. Therefore, in the present embodiment, the partial image similarity determination unit 117 includes a pixel area (for example, 3 ×) having a predetermined size corresponding to each other between the partial image that has arrived first and the partial image that has arrived after the second. 3 is calculated as the similarity.
Then, the partial image similarity determination unit 117 determines whether or not the calculated similarity is equal to or less than a threshold value. The partial image similarity determination unit 117 performs such determination every time a packet of a new partial image is received and a pixel value necessary for calculating the similarity is held in the received partial image holding unit 108.

Then, even when all of the pixel values of the new partial image have not arrived, the partial image similarity determination unit 117 determines that the similarity is equal to or lower than the threshold value, and the new partial image arrives first. It is determined that the partial image is not similar.
On the other hand, when the similarity calculated as described above is not more than the threshold value for all the pixel values of the new partial image, the partial image similarity determination unit 117 determines that the new partial image Judged to be similar to the image.

The re-transmission request unit 118 transmits a re-transmission of a new partial image determined by the partial image similarity determination unit 117 as not similar to the first partial image that has arrived via the network 121. To request. The partial image transmission unit 106 reads out the partial image requested to be retransmitted from the retransmission request unit 118 from the captured partial image holding unit 105 and retransmits the partial image. When the retransmission request unit 118 requests retransmission of the partial image at a stage where all the pixel values of the partial image are not transmitted, the partial image transmission unit 106 transmits the pixel value of the partial image. Redo from the beginning.
The units 107 to 118 of the information processing apparatus 20 are connected to each other via an internal bus 120 so that they can communicate with each other.

When the partial image receiving unit 107 receives the first partial image for the same X-ray image 200, the following processing is performed immediately (as the foreground processing). First, the image analysis unit 109 analyzes the partial image and determines an image processing parameter. The image processing unit 113 performs image processing on the first partial image 210a received for the same X-ray image 200, and the image display unit 116 displays the partial image after the image processing and the image processing parameters. I do.
On the other hand, the following processing is performed as background processing. That is, the partial image receiving unit 107 receives the second and subsequent partial images, the entire image restoring unit 111 restores all the partial images 210a to 210d after the arrival, and the image processing unit 113 Image processing for the whole image is performed as background processing.

Next, an example of the operation of the radiographic imaging system will be described with reference to the flowchart of FIG.
In step S <b> 301, the X-ray detector 102 detects an X-ray image based on the X-rays emitted from the X-ray tube 101, and the captured image holding unit 103 detects the X-ray image 200 detected by the X-ray detector 102. Hold.
Next, in step S <b> 302, the partial image generation unit 104 generates a plurality of partial images 210 a to 210 d from the X-ray image 200 held in the captured image holding unit 103 and holds the partial images 210 a to 210 d in the captured partial image holding unit 105.
Next, in step S <b> 303, the partial image transmission unit 106 transmits the partial images 210 a to 210 d held in the captured partial image holding unit 105. The partial image transmission unit 106 transmits the partial images 210a, 210b, 210c, and 210d in this order unless there is a re-transmission request in step S308 described later. On the other hand, when the retransmission request unit 118 requests retransmission, the partial image transmission unit 106 stops transmitting the current partial image, and retransmits the partial image requested to be retransmitted from the beginning.

Next, in step S <b> 304, the partial image receiving unit 107 receives the partial image transmitted from the partial image transmitting unit 106 and holds it in the received partial image holding unit 108.
Next, in step S <b> 305, the partial image receiving unit 107 determines whether or not the partial image held in the received partial image holding unit 108 is the partial image 210 a received first for the same X-ray image 200. . As a result of this determination, if the partial image held in the received partial image holding unit 108 is the partial image 210a received for the same X-ray image 200 first, the process proceeds to step S306; otherwise, the process proceeds to step S307. .

  In step S306, the image analysis unit 109 analyzes the partial image 210a, determines an image processing parameter, and holds the image processing parameter in the image processing parameter holding unit 110. Then, the image processing unit 113 performs image processing on the partial image 210a with reference to the image processing parameter held in the image processing parameter holding unit 110, and displays the partial image 210a subjected to the image processing on the image display unit. 116. And it returns to the process of step S304 and the process about the following partial image 210b is continued.

In step S307, the partial image similarity determination unit 117 determines whether the partial image 210a received first for the same X-ray image 200 is similar to the partial image received in step S304 this time.
As a result of this determination, if the first received partial image 210a is not similar to the currently received partial image, the process proceeds to step S308; otherwise, the process proceeds to step S309.

In step S308, the retransmission request unit 118 requests the partial image transmission unit 106 to retransmit the partial image received in this step S304 via the network 121. Then, the process returns to step S303.
In step S309, the partial image receiving unit 107 determines whether or not all partial images 210a to 210d for the same X-ray image 200 have been received. If all the partial images 210a to 210d for the same X-ray image 200 have been received as a result of this determination, the process proceeds to step S310. Otherwise, the process returns to step S304, and the next part Continue processing the image.

In step S310, the whole image restoration unit 111 restores the whole image by combining all the partial images 210a to 210d of the same X-ray image 200 held in the reception partial image holding unit 108, and receives the received image. The whole image holding unit 112 holds it.
Next, in step S <b> 311, the image analysis unit 109 analyzes the whole image held in the received whole image holding unit 112 to determine image processing parameters, and holds them in the image processing parameter holding unit 110. Then, the image processing unit 113 refers to the image processing parameters held in the image processing parameter holding unit 110, performs image processing on all the outside images, and displays the entire image subjected to the image processing on the image display unit 116. To display. And the process by the flowchart of FIG. 3 is complete | finished.

  As described above, in the present embodiment, among the partial images 210a to 210d of the X-ray image 200, the similarity between the first received partial image 210a and the subsequent received partial images 210b to 210d is less than or equal to the threshold value. It is determined whether or not. If the degree of similarity is not less than or equal to the threshold, it is determined that the initially received partial image 210a is not similar to the currently received partial image, and the retransmission of the partial image is requested. Therefore, when transmitting a partial image of a captured X-ray image and restoring the entire image from the transmitted partial image, it is possible to determine whether or not the transmitted partial image is correct. Therefore, the entire image can be displayed quickly and accurately.

  In the present embodiment, the residual sum of squares of pixel values in a pixel area of a predetermined size corresponding to each other between the first partial image and the newly arrived partial image is calculated as the similarity. However, the similarity is not limited to this. For example, the absolute value of the difference between the pixel values of the mutually corresponding pixels between the first partial image and the newly arrived partial image may be used as the similarity. Also, the absolute value of the difference between the average values of the pixel values in a pixel area of a predetermined size corresponding to each other between the first partial image and the new partial image may be used as the similarity. Further, using the similarity of the histogram of the pixel values in the pixel area of a predetermined size corresponding to each other between the first partial image and the new partial image, or the first partial image, The correlation coefficient with the newly arrived partial image may be used as the similarity. Note that, as the pixel area of a predetermined size, a partial pixel area of the partial image is employed, but a pixel area of the entire partial image may be employed.

  In the present embodiment, the first partial image arrives at the first partial image and the second partial image arrives at the second partial image and the second partial image arrives at the second partial image. Similarity with the partial image was calculated. That is, the similarity between one partial image was calculated. However, it is possible to calculate the similarity of the similarity between the partial image that has arrived first and the partial image that has arrived after the second one or more units.

  A specific example will be described as follows. First, the similarity between the first partial image 210a and the second partial image 210b is calculated. At this time, the partial image 210a that arrives first is an example of one image, and the partial image 210b that arrives second is an example of the other image. If the partial images 210a and 210b are similar based on the similarity, an image obtained by combining the partial images 210a and 210b is generated. Then, the similarity between this image and an image obtained by combining the third partial image 210c and the fourth partial image 210d may be calculated. In this case, if the image obtained by combining the partial images 210a and 210b and the image obtained by combining the partial images 210c and 210d are not similar, it is possible to request retransmission of the partial images 210c and 210d. . Moreover, when doing in this way, you may transmit / receive the partial images 210c and 210d together. At this time, an image obtained by combining the partial images 210a and 210b becomes one image, and an image obtained by combining the partial images 210c and 210d becomes the other image.

Furthermore, it is also possible to determine a partial image to be requested for retransmission from the partial images 210c and 210d and request retransmission of only the determined partial image.
Further, an image obtained by combining the partial images 210a and 210b is analyzed to determine an image processing parameter, the determined image processing parameter is applied to the image, the image processing is performed, and the image subjected to the image processing is displayed. May be. In this way, it is possible to display a preview image that is more accurate than the partial image after image processing held in the processed partial image holding unit 114.

  Further, in the present embodiment, when the partial image that has arrived first is not similar to the newly arrived partial image, the retransmission of the newly arrived partial image is requested. However, the present invention is not necessarily limited to this case, and retransmission of a partial image that has already arrived may be requested. For example, if it is determined that the partial image that has arrived second is not similar to the partial image that has arrived first even if the second partial image has been retransmitted a predetermined number of times, You may request retransmission of the partial image that arrives first.

  In this embodiment, four partial images are generated by extracting pixels in odd columns / odd rows, pixels in even columns / even rows, pixels in even columns / odd rows, and pixels in odd columns / even rows, respectively. The case has been described as an example. However, the number of partial images and the generation method are not limited as long as a plurality of partial images are generated so as to have image quality that contributes to preview (confirmation) of the X-ray image. That is, in the plurality of partial images, pixels of a plurality of regions distributed over the entire X-ray image in units of one or a plurality of adjacent pixels are extracted according to a predetermined extraction pattern, and the pixels are extracted as X-rays. What is necessary is just to arrange | position according to the position of the pixel in an image.

  For example, the extraction pattern can be determined so that pixels extracted as the same partial image are pixels of at least one of the following first to third aspects in an X-ray image. The first aspect is an aspect in which pixels extracted as the same partial image are pixels that are not adjacent to each other in the X-ray image. The second mode is a mode in which pixels extracted as the same partial image are adjacent pixels in only one or two of the vertical direction, the horizontal direction, and the diagonal direction in the X-ray image. is there. The third mode is a mode in which the pixels extracted as the same partial image are all or some of the pixels in a plurality of consecutive rows or columns that are repeatedly arranged at a predetermined interval. In the example shown in FIG. 2, the extraction pattern is determined so that the pixels extracted as the same partial image are pixels that are not adjacent to each other in the X-ray image. Of course, when obtaining a plurality of partial images, the same pixel is not extracted from the X-ray image.

Further, in the present embodiment, the case where partial images 210a to 210d having a quarter size of the original X-ray image are transmitted and received has been described as an example. However, this is not always necessary. In the example of the present embodiment, if the number of pixels of the X-ray image is not a multiple of 4, the four partial images 210a to 210d do not have the same size (number of pixels), so the number of pixels is as much as possible. The size of the partial image can be determined to be even.
In addition, for example, partial images may be transmitted in the order of 1/8 size, 1/4 size, 1/2 size, and 1/8 size of the original X-ray image (that is, partial images). The image size may be different). In this case, for example, the similarity can be calculated as follows. Interpolation processing or thinning-out processing is performed so that one size (number of pixels) of two different size partial images matches the other size, and the degree of similarity is calculated after combining both sizes. . In addition, without matching the sizes of the two, the positions of the pixels corresponding to each other may be set in advance, and the similarity may be calculated using the pixels corresponding to each other.

In this embodiment, the retransmission request unit 118 requests the partial image transmission unit 106 to retransmit the partial image via the network 121. However, it is not always necessary to output a signal for retransmitting the partial image. For example, the retransmission request unit 118 notifies the partial image transmission unit 106 that the partial image has not been properly received, and the partial image transmission unit 106 retransmits the corresponding partial image along with this notification. You may send it.
The information processing system may be configured as follows. First, you may make it implement | achieve the function of this embodiment which the information processing apparatus 20 has with a several apparatus. Similarly, the X-ray imaging apparatus 10 may be realized by a plurality of apparatuses. Further, the above-described embodiment may be realized by a plurality of devices communicating across borders.

  The above-described embodiments are merely examples of implementation in carrying out the present invention, and the technical scope of the present invention should not be construed in a limited manner. That is, the present invention can be implemented in various forms without departing from the technical idea or the main features thereof.

(Other examples)
The present invention is also realized by executing the following processing. That is, first, software (computer program) for realizing the functions of the above embodiments is supplied to a system or apparatus via a network or various storage media. Then, the computer (or CPU, MPU, etc.) of the system or apparatus reads and executes the computer program.

  10 X-ray imaging apparatus, 20 Information processing apparatus

Claims (10)

Extract a pixel in a plurality of regions distributed in a radiographic image in units of one pixel or a plurality of adjacent pixels based on a predetermined extraction pattern, and extract the pixel according to the position of the extracted pixel in the radiographic image An information processing apparatus that communicates with a radiation imaging apparatus that generates a plurality of partial images by arranging the pixels,
Receiving means for receiving the plurality of partial images from the radiation imaging apparatus;
Calculating means for calculating the similarity between one image obtained from one or more partial images received by the receiving means and the other image that is another partial image received by the receiving means;
A determination unit that determines whether the one image and the other image are similar based on the similarity calculated by the calculation unit;
When the determination means determines that the one image and the other image are not similar, an output means for outputting a signal for retransmitting either the one image or the other image When,
An information processing apparatus comprising:   The information processing apparatus according to claim 1, further comprising display means for displaying an image based on the one or more partial images received by the receiving means.   When the determination unit determines that all the partial images generated from the radiation image are similar, the determination unit further includes a restoration unit that combines the all partial images to restore the radiation image. The information processing apparatus according to claim 1 or 2.   The calculation means includes one image composed of one or more partial images already received by the receiving means for the same radiation image, and one or more newly received by the receiving means thereafter. The information processing apparatus according to claim 1, wherein the degree of similarity with the other image, which is an image composed of partial images, is calculated. The calculating means calculates a similarity between the first partial image received with respect to the same radiographic image and the second and subsequent partial images;
The determination means determines whether or not the first partial image received for the same radiographic image is similar to the second partial image received based on the similarity calculated by the calculation means. Respectively,
When the determination unit determines that the first partial image received for the same radiation image and the second and subsequent partial images are not similar by the determination unit, the second and later The information processing apparatus according to claim 1, wherein a signal for retransmitting the received partial image is output.   When the partial image is received by the reception unit among the plurality of partial images, the calculation unit sets the partial image as the other image, and among the plurality of partial images, the partial image is displayed by the reception unit. 6. The degree of similarity between the one image and the other image is calculated using the partial image received before the one image as the one image. 6. Information processing device.   The information processing apparatus according to claim 6, wherein among the plurality of partial images, a partial image first received by the receiving unit is set as the one image. Extract a pixel in a plurality of regions distributed in a radiographic image in units of one pixel or a plurality of adjacent pixels based on a predetermined extraction pattern, and extract the pixel according to the position of the extracted pixel in the radiographic image An information processing method for communicating with a radiation imaging apparatus that generates a plurality of partial images by arranging the pixels,
Receiving the plurality of partial images from the radiation imaging apparatus;
A calculation step of calculating a similarity between one image obtained from the one or more partial images received by the reception step and the other image that is the other partial image received by the reception step;
A determination step of determining whether the one image and the other image are similar based on the similarity calculated by the calculation step;
An output step of outputting a signal for retransmitting either the one image or the other image when it is determined by the determination step that the one image and the other image are not similar to each other When,
An information processing method characterized by comprising: Extract a pixel in a plurality of regions distributed in a radiographic image in units of one pixel or a plurality of adjacent pixels based on a predetermined extraction pattern, and extract the pixel according to the position of the extracted pixel in the radiographic image An information processing system that communicates with a radiation imaging apparatus that generates a plurality of partial images by disposing the selected pixels,
Receiving means for receiving the plurality of partial images from the radiation imaging apparatus;
Calculating means for calculating the similarity between one image obtained from one or more partial images received by the receiving means and the other image that is another partial image received by the receiving means;
A determination unit that determines whether the one image and the other image are similar based on the similarity calculated by the calculation unit;
When the determination means determines that the one image and the other image are not similar, an output means for outputting a signal for retransmitting either the one image or the other image When,
An information processing system comprising:   A program that causes a computer to function as each unit of the information processing apparatus according to claim 1.

Images