Information processing device, radiography system, method of operating the information processing device, and program

Abstract

This invention provides an information processing device that prevents bone density measurements using inappropriate images in radiography using an imaging device that performs both general radiography and bone density measurement, thereby improving throughput and reducing the risk of inaccurate bone density calculations. [Solution] An information processing device for controlling general radiography, which involves photographing a subject using a single radiation energy to acquire one image, and bone density measurement radiography, which involves photographing a subject using multiple different radiation energies to acquire multiple images, comprising: an acquisition unit for acquiring the acquired image; a determination unit for determining whether the acquired image was taken under pre-set shooting conditions; and a notification control unit for controlling a notification to the operator indicating that the acquired image was not taken under pre-set shooting conditions when it is determined that the acquired image was not taken under pre-set shooting conditions.

Description

Technical Field

[0001] The present disclosure relates to an information processing apparatus, a radiation imaging system, an operation of the information processing apparatus, and a program.

Background Art

[0002] Conventionally, for the diagnosis of osteoporosis and the like, a measurement method called BMD (Bone Mineral Density) measurement has been used. In BMD measurement, it is necessary to measure the bone mineral quantification in bone. As a method for measuring bone mineral quantification, the DXA (Dual-energy X-ray Absorptiometry) method has been used.

[0003] The DXA method is a technique capable of measuring bone density based on the difference in radiation absorption coefficients between soft tissue and bone tissue using two types of radiation with different energy distributions. As an apparatus dedicated to bone density measurement using the DXA method, for example, there is an apparatus equipped with a line sensor in which high-energy radiation and low-energy radiation are alternately irradiated at a constant cycle. Also known is a filter method apparatus in which a filter is placed in front of the radiation tube to change the irradiation energy.

[0004] In recent years, digital image diagnosis using a radiation imaging image taken with a general imaging apparatus has become widespread, and attempts have also begun to apply it to bone density measurement. When performing bone density imaging using an FPDe (Flat Panel Detector), which is a radiation detector for general imaging, radiation is irradiated over the entire surface of the sensor by cone beam imaging to obtain an image. Therefore, there is an advantage that one imaging takes a short time, body movement is unlikely to occur, and the burden on the patient is small. Also, since a radiation detector for general imaging is used, there is an advantage that an image with higher definition and higher sensitivity than a conventional apparatus dedicated to bone density measurement can be obtained, and the imaging image for bone density measurement can be used for diagnosis.

[0005] In imaging devices capable of both general radiography and bone density measurement, as described above, there is a possibility that users may mistakenly use general radiography conditions when receiving an order for bone density measurement. Therefore, Patent Document 1 proposes a configuration that prevents bone density measurement under unsuitable conditions by confirming the imaging conditions before shooting. [Prior art documents] [Patent Documents]

[0006] [Patent Document 1] Japanese Patent Publication No. 2023-183893 [Overview of the project] [Problems that the invention aims to solve]

[0007] Patent Document 1 discloses checking the shooting conditions before shooting, but it does not describe how to determine whether or not the desired shooting conditions were met during the actual shooting.

[0008] In radiography using radiation, there is a possibility that the actual imaging conditions may differ from the set conditions due to malfunctions in the radiation generator or errors by the operator during imaging. If the imaging is not performed according to the imaging conditions specified in the bone density measurement order, the bone density analysis may fail or yield inaccurate results. This can lead to wasted time during the measurement process and the risk of not being able to calculate accurate bone density.

[0009] One embodiment of this disclosure aims to provide an information processing device that can prevent bone density measurement using inappropriate images, improve throughput, and reduce the risk of inaccurate bone density calculation in radiography using an imaging device that performs both general radiography and bone density measurement radiography. [Means for solving the problem]

[0010] An information processing device according to one embodiment of the present disclosure is an information processing device that controls general radiography, which involves photographing a subject using a single radiation energy to acquire one image, and bone densitometry radiography, which involves photographing a subject using multiple different radiation energies to acquire multiple images, and comprises: an acquisition unit for acquiring the acquired image; a determination unit for determining whether the acquired image was taken under pre-set shooting conditions; and a notification control unit for controlling a notification to the operator indicating that the acquired image was not taken under the pre-set shooting conditions when it is determined that the acquired image was not taken under the pre-set shooting conditions. [Effects of the Invention]

[0011] According to one embodiment of the present disclosure, in radiography using an imaging device that performs both general radiography and bone density measurement, it is possible to prevent bone density measurement using inappropriate images, improve throughput, and reduce the risk of being unable to calculate accurate bone density. [Brief explanation of the drawing]

[0012] [Figure 1] This document shows an example of the configuration of a bone density measurement system according to Embodiment 1 of this disclosure. [Figure 2] This flowchart shows an example of the shooting process and output process according to Embodiment 1. [Figure 3] An example of the GUI screen displayed before shooting according to Embodiment 1 is shown. [Figure 4] An example of the GUI screen displayed after shooting according to Embodiment 1 is shown. [Figure 5] An example of a GUI screen displayed after bone density measurement under incorrect imaging conditions according to Embodiment 1 is shown. [Figure 6] An example of a GUI screen displayed after bone density measurement under incorrect imaging conditions according to Embodiment 2 is shown. [Modes for carrying out the invention]

[0013] Hereinafter, exemplary embodiments for carrying out the present disclosure will be described in detail with reference to the drawings. However, the dimensions, materials, shapes, and relative positions of components described in the following embodiments are arbitrary and can be modified depending on the configuration of the apparatus to which the present disclosure applies or various conditions. In addition, the same reference numerals are used between drawings to indicate elements that are identical or functionally similar.

[0014] The following describes a radiation imaging system using X-rays as an example of radiation. However, the radiation may be X-rays or other types of radiation. In the following embodiments, the term radiation may include, for example, electromagnetic radiation such as X-rays and gamma rays, as well as particle radiation such as alpha rays, beta rays, particle beams, proton beams, heavy ion beams, and meson beams.

[0015] [Embodiment 1] Hereinafter, with reference to Figures 1 to 5, a bone density measurement system according to Embodiment 1 of this disclosure will be described as an example of a radiography system that controls radiography and captures and displays radiographic images. Furthermore, the information processing device and the operation method of the information processing device included in the bone density measurement system will be described below. Figure 1 shows an example of the configuration of the bone density measurement system according to this embodiment. The bone density measurement system according to this embodiment is provided with an information processing device 100, a radiation generator 130, a radiation detection device 120, an operation unit 110, and a display unit 150.

[0016] The information processing apparatus 100 has a function of controlling each component. The information processing apparatus 100 is a device for obtaining a radiation image, and controls radiation imaging using the radiation detection apparatus 120 and the radiation generation apparatus 130. For example, the information processing apparatus 100 can control the timing of generating radiation by the radiation generation apparatus 130 and the imaging conditions of the radiation. Also, the information processing apparatus 100 can control the timing of capturing and outputting the image data of the radiation detection apparatus 120. Furthermore, the information processing apparatus 100 can perform arbitrary image processing on the image data. Also, the information processing apparatus 100 can output an image to the display unit 150 or provide a graphical user interface (GUI) using the display unit 150 while controlling the operation of the radiation detection apparatus 120.

[0017] The information processing apparatus 100 is connected to the radiation detection apparatus 120, the radiation generation apparatus 130, the operation unit 110, and the display unit 150. The information processing apparatus 100 can be connected to the radiation detection apparatus 120 and the radiation generation apparatus 130 via, for example, a wired or wireless network or a dedicated line. Also, the information processing apparatus 100 is connected to a RIS (Radiology Information Systems) 140 and a PACS (Picture Archiving and Communication Systems) 160. Note that the connected RIS 140 and PACS 160 may be incorporated in the same PC (Personal Computer) as the information processing apparatus 100, or may be incorporated in different PCs and connected to the information processing apparatus 100 via a network.

[0018] The radiation generation apparatus 130 includes a radiation source such as an X-ray tube that generates radiation. The radiation generation apparatus 130 generates radiation based on the control by the information processing apparatus 100. Also, the radiation generation apparatus 130 can output the imaging conditions at the time of imaging to the information processing apparatus 100.

[0019] The radiation detection device 120 detects the radiation irradiated from the radiation generation device 130 and passed through a subject (not shown), and outputs image data corresponding to the radiation. Note that the image data can also be referred to as, for example, an image, a medical image, or a radiation image. Specifically, the radiation detection device 120 detects the radiation transmitted through the subject as electric charges corresponding to the amount of transmitted radiation. For example, in the radiation detection device 120, a direct conversion type sensor that directly converts radiation such as a-Se that converts radiation into electric charges, or an indirect type sensor using a scintillator such as CsI that converts radiation into visible light and a photoelectric conversion element such as a-Si is used. Further, the radiation detection device 120 generates image data by performing A / D conversion on the detected electric charges, and outputs it to the information processing device 100.

[0020] Note that the DXA method is a method of measuring bone density based on the difference in radiation absorption coefficients between soft tissue and bone tissue from a plurality of images obtained by irradiating two types of radiation with different energy distributions from the radiation generation device 130. Therefore, when measuring bone density by the DXA method, the radiation detection device 120 outputs image data based on each of the two types of radiation with different energy distributions. Note that as the radiation detection device 120, a radiation detector capable of detecting radiation with a plurality of different energies by one irradiation and obtaining a radiation image may be used. As such a radiation detector, for example, a radiation detector including a laminated sensor formed of two types of materials (phosphors) with different X-ray absorption rates may be used.

[0021] The display unit 150 is configured using an arbitrary monitor, and can display images generated by the information processing device 100, measured bone density, notifications to the subject, and the like. The operation unit 110 is an input device that receives instructions from an operator, and includes, for example, a keyboard and a mouse. Note that the display unit 150 may be configured by a touch panel type display, and in this case, the display unit 150 can also be used as the operation unit 110. Further, the information processing device 100, the operation unit 110, and the display unit 150 may be integrally configured.

[0022] During general radiography (radiography) or bone density measurement, the radiation detection device 120 captures the radiation generated by the radiation generator 130 and outputs the image data to the information processing device 100. The information processing device 100 performs image processing on the image data output from the radiation detection device 120 to generate a display image, which is then displayed on the display unit 150.

[0023] Next, the configuration of the information processing device 100 will be described. The information processing device 100 is equipped with an image acquisition unit 101, an examination information input unit 102, an image processing unit 103, a determination unit 104, an output control unit 105, and a bone density measurement unit 106.

[0024] The image acquisition unit 101 acquires image data output from the radiation detection device 120. The image acquisition unit 101 also acquires shooting condition information when image data is captured using the radiation detection device 120.

[0025] The inspection information input unit 102 acquires inspection information manually entered by the operator using the operation unit 110, or inspection information output from the RIS 140. The inspection information input unit 102 may acquire inspection information from the RIS 140 depending on whether the operator has chosen to use the inspection information acquired from the RIS 140 using the operation unit 110, or it may acquire inspection information from the RIS 140 without operation of the operation unit 110. Furthermore, the inspection information input unit 102 may acquire inspection information selected by the operator from among multiple pieces of inspection information received from the RIS 140. The inspection information acquired by the inspection information input unit 102 is managed in association with image data captured by the radiation detection device 120.

[0026] The image processing unit 103 performs image processing on the image data output from the radiation detection device 120, such as noise reduction, gradation processing, grid fringe reduction, and irradiation field recognition. The image processing unit 103 can also perform image processing on the image data output from the radiation detection device 120, such as cropping and rotation. The image processing such as noise reduction, gradation processing, and cropping performed by the image processing unit 103 may be carried out by any known method.

[0027] The determination unit 104 determines whether the captured image was taken under pre-set shooting conditions. Specifically, the determination unit 104 compares the shooting conditions used when capturing the radiographic image with the shooting conditions included in the inspection information set before shooting. Based on the comparison result, the determination unit 104 determines whether the captured image was taken under pre-set shooting conditions.

[0028] The output control unit 105 converts the images output from the image processing unit 103 into DICOM format and outputs them to the PACS 160. The output control unit 105 controls the output of images obtained from general radiography and multiple images with different energy distributions obtained from bone density measurement radiography, as well as reports. For example, the output control unit 105 can display a GUI including images obtained from general radiography and images obtained from bone density measurement radiography on the display unit 150. In addition, the output control unit 105 can display notifications to the operator on the display unit 150 according to the judgment result from the judgment unit 104.

[0029] The bone density measurement unit 106 measures the bone density of the subject using images captured by bone density measurement imaging. The bone density measurement method may be any known method, such as the DXA method. The bone density measurement unit 106 can also generate a report on the measurement results.

[0030] Here, the information processing device 100 can be comprised of a computer equipped with a processor and memory. The information processing device 100 may be comprised of a general-purpose computer or a computer specifically designed for radiography systems. Furthermore, the information processing device 100 may be, for example, a personal computer, such as a desktop PC, notebook PC, or tablet PC (portable information terminal). In addition, the information processing device 100 may be configured as a cloud-type computer in which some components are located on external devices.

[0031] Furthermore, each component of the information processing device 100 described above may be composed of software modules executed by a processor such as a CPU (Central Processing Unit) or an MPU (Micro Processing Unit). The processor may be, for example, a GPU (Graphical Processing Unit) or an FPGA (Field-Programmable Gate Array). In addition, each of these components may be composed of circuits that perform specific functions, such as ASICs.

[0032] Next, the image acquisition and output processing of radiation images according to this embodiment will be explained according to the flowchart in Figure 2. Here, Figure 2 is a flowchart showing an example of the image acquisition and output processing of radiation images according to this embodiment.

[0033] (Step S200: Inspection information received) In step S200, the inspection information input unit 102 receives instructions from the operator and, in response to those instructions, selects whether to use the inspection information received from RIS140 or for the operator to manually input the inspection information. If the former method is selected (S200 / Yes), the process proceeds to step S210. On the other hand, if the latter method is selected (S200 / No), the process proceeds to step S215.

[0034] (Step S210: Test Selection) In step S210, the inspection information input unit 102 sets one of the inspection information received from the RIS 140 as the inspection target. This process, for example, sets the selected inspection information as the inspection target in response to an operation input in which the operator selects one of several inspection information displayed in a list format. Once the inspection target has been set by the inspection information input unit 102, the process proceeds to step S220.

[0035] (Step S215: Manual input) On the other hand, in step S215, the inspection information input unit 102 receives manual input of inspection information from the operator via the operation unit 110 and sets it as the inspection target. Once the inspection target is set by the inspection information input unit 102, the process moves to step S220.

[0036] (Step S220: Start of examination) In step S220, the inspection information is determined by the inspection information input unit 102 according to the operator's input, and the information processing device 100 transmits a signal to the radiation detection device 120 related to the imaging to transition to a ready state.

[0037] In response, if no bias voltage is applied to the two-dimensional image sensor, the radiation detection device 120 controls the bias power supply with the main control circuit and applies a bias voltage to the two-dimensional image sensor. Subsequently, in order to read out the dark current signals accumulated in the pixels, the drive circuit performs initialization by reading image signals from the pixel array. After initialization is complete, the radiation detection device 120 transmits status information to the information processing device 100 indicating that it is ready to obtain a radiation image.

[0038] Furthermore, the information processing device 100 notifies the radiation generator 130 involved in the imaging of the set values ​​of the imaging conditions to be used for the imaging. The radiation generator 130 prepares to output radiation according to the notified imaging conditions (for example, dose information such as tube voltage and tube current). The notified imaging conditions may be based on the inspection information set in step S210 or step S215. If the information processing device 100 is unable to correctly notify the radiation generator 130 of the imaging conditions, for example due to a communication error, the output control unit 105 may display a warning on the display unit 150 so as not to proceed to step S230 in order to prevent invalid imaging.

[0039] Here, an example of a GUI screen displayed on the display unit 150 at the start of the examination is shown in Figure 3. GUI screen 3 shown in Figure 3 displays the state before general radiography and bone density measurement radiography of the lumbar spine region. GUI screen 3 displays the protocol 31 for general radiography and the protocol 32 for bone density measurement. For example, the protocol 32 for bone density measurement can display an icon representing bone density measurement.

[0040] (Step S230: Photo taken) In step S230, imaging is performed. The radiation generator 130 irradiates radiation according to the imaging conditions notified in step S220, in response to the operator's operation of the exposure switch (not shown). The drive circuit of the radiation detection device 120 detects the irradiated radiation, reads the resulting image signal using the readout circuit, and generates a radiation image (image data). Subsequently, the radiation detection device 120 transmits the radiation image to the information processing device 100. The image acquisition unit 101 of the information processing device 100 acquires the radiation image transmitted from the radiation detection device 120.

[0041] Furthermore, the radiation generator 130 notifies the information processing device 100 of the shooting conditions actually used during the shooting process. However, the shooting conditions used during the shooting process may differ from the shooting conditions notified and set in step S220. For example, if the operator makes a mistake in operating the exposure switch or if there is a malfunction in the radiation generator 130, the shooting conditions used during the shooting process may differ from the shooting conditions notified and set in step S220.

[0042] (Step S240: Image display) In step S240, the captured image is displayed. Once step S240 begins, the process moves to step S2401. In step S2401, the image processing unit 103 acquires examination information, including the desired imaging conditions, which were entered at the start of imaging. The examination information may be stored in memory, or it may be kept in a storage device such as a database or file (not shown) and read from the storage device in step S2401. Here, examination information refers to, for example, the examination information set in step S210 or step S215. For example, the examination information includes the imaging site for radiography, imaging procedure information (e.g., general radiography or bone densitometry), and imaging conditions for each imaging procedure (e.g., dose information such as irradiation time, tube voltage, and tube current).

[0043] In step S2402, the image processing unit 103 performs image processing on the radiation image captured in step S230. The content of the image processing may be changed according to the inspection information acquired in step S2401, such as the area being inspected. In addition to noise reduction and gradation processing, the image processing may also include processing to reduce grid fringes and processing to recognize the irradiation field. The image processing unit 103 also associates the shooting conditions used during the shooting, acquired in step S230, with the captured image information. Subsequently, in step S2403, the output control unit 105 displays the processed radiation image on the display unit 150.

[0044] Here, an example of the GUI screen displayed on the display unit 150 in step S2403 is shown in Figure 4. The GUI screen 4 shown in Figure 4 displays an image 41 taken by bone densitography corresponding to the lumbar spine region. Here, image 41 may be any of the images taken by bone densitography. Note that the GUI screen 4 may also display an image taken by general radiography, or it may display multiple images taken by bone densitography side by side, switching between them, or superimposed on each other.

[0045] In step S2404, the determination unit 104 compares the imaging conditions used during each imaging procedure, acquired in step S230, with the imaging conditions acquired in step S2401. If all the comparison targets (for example, tube voltage, tube current, and irradiation time) match (step S2404 / Yes), the determination unit 104 determines that the acquired radiographic image was acquired under pre-set imaging conditions. In this case, the image display processing in step S240 is completed.

[0046] On the other hand, if even one of the shooting conditions does not match (step S2404 / No), the determination unit 104 determines that the captured radiation image is not a radiation image taken under the pre-set shooting conditions. In this case, the process proceeds to step S2405.

[0047] Regarding the determination of agreement, in addition to perfect agreement, a general threshold determination may be applied, such as considering an agreement if the difference between the two comparison targets falls within a specific range (below a threshold). In this case, if the difference between the two comparison targets exceeds the threshold, it may be considered a mismatch. Furthermore, even if the shooting conditions could not be obtained in step S230, the determination unit 104 may determine that there is a mismatch and that the captured radiation image is not a radiation image taken under the pre-set shooting conditions. For example, such cases may occur when the shooting conditions were not notified due to a malfunction of the radiation generator 130, or when the information processing device 100 could not obtain the shooting conditions notified by the radiation generator 130 due to a communication failure.

[0048] Furthermore, the threshold for determining agreement may differ between general radiography and bone densitometry radiography. For example, the threshold for bone densitometry radiography may be lower than the threshold for general radiography. In general radiography, even if the imaging conditions differ slightly from those set in advance, it may not significantly affect the interpretation of the radiographic image. On the other hand, in bone densitometry radiography, if the imaging conditions differ slightly from those set in advance, the calculated bone density may differ significantly. By setting the threshold for bone densitometry radiography lower than that for general radiography, it is possible to reduce unnecessary re-imaging in general radiography and reduce the risk of inaccurate bone density calculation in bone densitometry radiography.

[0049] In step S2405, the output control unit 105 notifies the operator that the captured radiographic image was taken under inappropriate shooting conditions. The output control unit 105 may display a message dialog or icon on the display unit 150, or it may notify the operator by sound using a speaker (not shown), etc. In addition, if multiple images are taken in bone density measurement imaging, the output control unit 105 may notify the operator which image was taken under inappropriate shooting conditions. Furthermore, the output control unit 105 may highlight and notify only the shooting conditions (parameters) that were determined to be inconsistent in step S2404.

[0050] Here, Figure 5 shows an example of the GUI screen displayed on the display unit 150 in step S2405. The GUI screen 5 shown in Figure 5 displays a message dialog 51 indicating that the captured radiographic image was taken under inappropriate shooting conditions, the items to be checked, a prompt to retake the image, and the shooting conditions that were determined to be inconsistent in step S2404. The GUI screen 5 also displays a display 52 that includes an icon indicating that multiple images taken using the bone density measurement protocol were taken under inappropriate shooting conditions.

[0051] Note that while GUI screen 5 displays message dialogs and icons related to bone density measurement, it can also display message dialogs and icons related to general radiography. Furthermore, display 52, which includes an icon indicating that multiple images taken using the bone density measurement protocol were taken under inappropriate shooting conditions, may also include an icon that allows for the identification of images taken under inappropriate conditions among multiple images. For example, the output control unit 105 may include an arbitrary symbol only in the image icon corresponding to the image taken under inappropriate conditions among multiple images.

[0052] In step S2406, the information processing device 100 sets the displayed image as a defective image and adds a new shooting order for the captured image, prompting the operator to retake the image, and then terminates the image display process.

[0053] (Step S250: Bone density measurement and evaluation) In step S250, the bone density measurement unit 106 determines whether the captured image is an image obtained from bone density measurement. If the captured image is an image obtained from bone density measurement (step S250 / Yes), the process proceeds to step S260. On the other hand, if the captured image is not an image obtained from bone density measurement (step S250 / No), the process proceeds to step S270.

[0054] (Step S260: Bone density measurement) In step S260, the bone density measurement unit 106 measures the subject's bone density using the image captured during bone density measurement imaging and creates a report on the measurement results. The series of processes related to bone density measurement (steps S250 and S260) may be set to operate automatically after the completion of the image display process (step S240), or they may be set to operate in response to instructions from the operator. In the former case, if bone density measurement imaging is performed, the series of processes related to bone density measurement can be carried out without any operation after the image is displayed. In the latter case, for example, after the image is displayed, it is determined in step S250 whether the image captured is from bone density measurement imaging, and if it is (S250 / Yes), the output control unit 105 displays a button on the display unit 150 to proceed to bone density measurement. Then, when the operator presses the button, the process proceeds to step S260. In this case, the operator can perform bone density measurement at any time. Bone density measurement may also be performed after the examination is completed.

[0055] (Step S270: Test complete, output) In step S270, the information processing device 100 terminates the inspection based on the operator's input. At the time of the inspection's completion, the output control unit 105 outputs the captured images and corresponding reports to the external device, PACS 160. Note that this output processing does not necessarily have to occur at the time of the inspection's completion. For example, the output control unit 105 may output images or reports again after the inspection is completed.

[0056] As described above, the radiography system according to this embodiment includes a radiation detection device 120 for detecting radiation and an information processing device 100 that is communicatively connected to the radiation detection device 120. The information processing device 100 controls general radiography, which involves photographing a subject using a single radiation energy to acquire one image, and bone densitometry radiography, which involves photographing a subject using multiple different radiation energies to acquire multiple images. The radiography system may also include a radiation generator 130 for generating radiation, in which case the information processing device 100 can be communicatively connected to the radiation generator 130.

[0057] The information processing device 100 comprises an image acquisition unit 101, a determination unit 104, and an output control unit 105. The image acquisition unit 101 can function as an example of an acquisition unit that acquires captured images. The determination unit 104 can function as an example of a determination unit that determines whether or not an acquired image was taken under pre-set shooting conditions. The output control unit 105 can function as an example of a notification control unit that controls a notification to the operator indicating that the acquired image was not taken under pre-set shooting conditions when it is determined that the acquired image was not taken under pre-set shooting conditions.

[0058] According to this embodiment, the information processing device 100 determines and notifies whether the captured image was taken under appropriate shooting conditions according to the order in the imaging device that performs bone density measurement, immediately after capture. This prevents bone density measurement using inappropriate images, improves throughput, and reduces the risk of inaccurate bone density calculation.

[0059] Furthermore, the image acquisition unit 101 acquires the shooting conditions at the time the acquired image was taken, and the determination unit 104 can compare the shooting conditions at the time the acquired image was taken with the pre-set shooting conditions to make a determination. In this case, the determination unit 104 can, for example, determine whether the difference between the dose information included in the shooting conditions at the time the acquired image was taken and the dose information included in the pre-set shooting conditions exceeds a threshold. If the determination unit 104 determines that the difference exceeds the threshold, it can determine that the acquired image was not taken under the pre-set shooting conditions.

[0060] With this configuration, if the shooting conditions at the time of capturing an acquired image differ from the pre-set shooting conditions, it is possible to notify that the captured image was not taken under the appropriate shooting conditions according to the order. Therefore, it is possible to prevent bone density measurements using inappropriate images, improve throughput, and reduce the risk of inaccurate bone density calculations.

[0061] Furthermore, the threshold used to interpret images taken during bone densitometry imaging may be lower than the threshold used to interpret images taken during general radiography. In this case, unnecessary retakes can be reduced in general radiography, and the risk of inaccurate bone density calculations can be reduced in bone densitometry imaging.

[0062] Furthermore, the output control unit 105 can display notifications on the display unit 150 and highlight the shooting conditions that are the basis for determining that the acquired image was not taken under pre-set shooting conditions. More specifically, the output control unit 105 can highlight the shooting conditions at the time the acquired image was taken that do not match the pre-set shooting conditions and display them on the display unit 150. In this case, the operator can more clearly understand which shooting conditions of the acquired image did not match the pre-set shooting conditions. In this case, the output control unit 105 can function as an example of a display control unit that controls the display unit 150.

[0063] Furthermore, the notification from the output control unit 105 may include a notification prompting the user to recapture the acquired image. In this case, throughput can be further improved.

[0064] [Embodiment 2] Next, a bone density measurement system according to Embodiment 2 of this disclosure will be described with reference to Figure 6. In the bone density measurement system according to this embodiment, the notification content when it is determined that the captured image is not a radiographic image taken under pre-set shooting conditions differs from that of Embodiment 1. Hereinafter, the bone density measurement system according to this embodiment will be described focusing on the differences from the bone density measurement system according to Embodiment 1. Note that each component of the bone density measurement system according to this embodiment is the same as each component of the bone density measurement system according to Embodiment 1, so the same reference numerals are used and their descriptions are omitted.

[0065] The flow related to the acquisition and output processing of radiation images according to this embodiment is the same as the flow according to Embodiment 1, except for steps S2405 and S2406. Therefore, the explanation of processes other than steps S2405 and S2406 will be omitted below with reference to Figure 2.

[0066] In step S2405 of this embodiment, the output control unit 105 displays guidance on the display unit 150 that is useful information for ensuring that the re-imaging is performed correctly. For example, when multiple images are taken during bone density measurement imaging, if the irradiation time does not match only for the second image, the output control unit 105 displays on the display unit 150 a recommendation to press the exposure switch for a sufficiently long time during re-imaging. Also, if the tube voltage does not match only for the first image, the output control unit 105 displays a prompt to check whether there is any deterioration in the radiation generator 130.

[0067] In bone density measurement imaging, when multiple images are taken, radiation irradiation is generally continued by continuously pressing (long-pressing) the exposure switch between taking multiple images. Therefore, if the shooting conditions at the time of shooting differ from the pre-set shooting conditions due to operator error, there is a high possibility that the irradiation time for the second and subsequent images will differ from the pre-set shooting conditions. For this reason, the output control unit 105 may, for example, display on the display unit 150 a recommendation to press the exposure switch for a sufficiently long time when retaking if the shooting conditions for the second image differ from the pre-set shooting conditions.

[0068] Furthermore, if there is a malfunction in the radiation generator 130, the tube voltage and other parameters of the images from the first image onward are likely to differ from the pre-set shooting conditions. For this reason, the output control unit 105 may, for example, display a message on the display unit 150 prompting the user to check for deterioration of the radiation generator 130 if the shooting conditions of the first image differ from the pre-set shooting conditions.

[0069] Furthermore, the output control unit 105 displays an option on the display unit 150 to select the number of images to reshoot. For example, if the shooting conditions for only the second image are inconsistent, the output control unit 105 displays an option on the display unit 150 to select whether to create a reshoot order for only the second image to minimize exposure, or to create a new reshoot order for both images, taking into account the positional shift of the subject being illuminated in multiple images.

[0070] The output control unit 105 may also use voice or other means to notify the user that the captured image is not a radiographic image taken under pre-set shooting conditions, provide useful information to ensure correct shooting during reshooting, and indicate the number of images to be reshot. The selection of the number of images to be reshot may also be made based on instructions via the operation unit 110 or voice input.

[0071] Here, an example of the GUI screen displayed on the display unit 150 in step S2405 is shown in Figure 6. The GUI screen 6 shown in Figure 6 displays a message dialog 61 indicating that the acquired radiographic image was taken under inappropriate shooting conditions, guidance that provides useful information for correct re-shooting, and the shooting conditions that were determined to be inconsistent. The message dialog 61 also includes a display for selecting the number of images to re-shoot. Furthermore, the GUI screen 6 displays a display 62 that includes icons indicating that multiple images acquired using the bone density measurement protocol were taken under inappropriate shooting conditions. The display 62 is designed to distinguish only the image icons corresponding to the images taken under inappropriate shooting conditions from among the multiple images.

[0072] Note that while GUI screen 6 displays message dialogs and icons related to bone density measurement, it may also display message dialogs and icons related to general radiography. Furthermore, display 62 may include an icon that uniformly indicates that an image was taken under inappropriate conditions, without distinguishing between images taken under inappropriate conditions.

[0073] In step S2406, the information processing device 100 adds a reshoot order according to the content selected in step S2405 (such as the number of images taken).

[0074] As described above, the notification from the output control unit 105 according to this embodiment may include a notification to select whether to re-capture all images related to the examination, including the capture of acquired images, or to re-capture only the images related to the examination that are determined not to have been captured under pre-set shooting conditions. With such a configuration, it is also possible to select an option that reduces the amount of radiation exposure to the subject during re-capture.

[0075] Furthermore, the notification may include instructions or guidance regarding the necessary checks or operating procedures for reshooting, corresponding to the shooting conditions that led to the determination that the acquired image was not taken under pre-set conditions. With such a configuration, subsequent reshoots, if an image is determined to be inappropriate, can be performed more correctly.

[0076] Furthermore, consider the case where the first image in bone density measurement is determined to have been taken under pre-set shooting conditions, but the second image is determined not to have been taken under the same pre-set conditions. In this case, there is a high possibility that the shooting conditions at the time of shooting differ from the pre-set shooting conditions due to operator error. Therefore, the notification from the output control unit 105 may include a notification instructing the operator to press the exposure switch of the radiation generator 130 for a time corresponding to the pre-set shooting conditions. Even with such a configuration, subsequent reshoots performed when an image is determined to be inappropriate can be carried out more correctly.

[0077] Furthermore, consider the case where the first image taken during bone density measurement is determined not to have been taken under pre-set shooting conditions. In this case, there is a high probability that there is a malfunction in the radiation generator 130. Therefore, the notification from the output control unit 105 may include a notification instructing the operator to check for a malfunction in the radiation generator 130. Even with such a configuration, if an image is determined to be inappropriate, subsequent re-shooting can be performed more correctly.

[0078] (Other embodiments) The disclosure can also be implemented by supplying a program that implements one or more of the functions of the embodiments described above to a system or device via a network or storage medium, and by having one or more processors in the computer of that system or device read and execute the program. Furthermore, the disclosure can also be implemented by a circuit (e.g., an ASIC) that implements one or more functions. A computer may have one or more processors or circuits and may include a plurality of separate computers or a network of a plurality of separate processors or circuits for reading and executing computer executable instructions.

[0079] A processor or circuit may include a central processing unit (CPU), a microprocessing unit (MPU), a graphics processing unit (GPU), an application-specific integrated circuit (ASIC), or a field-programmable gateway (FPGA). Furthermore, a processor or circuit may include a digital signal processor (DSP), a dataflow processor (DFP), or a neural processing unit (NPU).

[0080] The above disclosure includes the following configurations, methods, and programs. (Composition 1) An information processing device for controlling general radiography, which involves using a single radiation energy to photograph a subject and acquire one image, and bone densitometry radiography, which involves using multiple different radiation energies to photograph a subject and acquire multiple images, An acquisition unit that acquires the captured image, A determination unit that determines whether the acquired image was taken under pre-set shooting conditions, If it is determined that the acquired image was not taken under the pre-set shooting conditions, a notification control unit controls a notification to the operator indicating that the acquired image was not taken under the pre-set shooting conditions. An information processing device equipped with the following features. (Configuration 2) The acquisition unit acquires the shooting conditions at the time the acquired image was taken, The determination unit compares the shooting conditions at the time of shooting with the pre-set shooting conditions to perform the determination, as described in Configuration 1. (Composition 3) The information processing device according to configuration 2, wherein the determination unit determines that the acquired image is not an image taken under the pre-set shooting conditions if the difference between the dose information included in the shooting conditions at the time of acquisition of the acquired image and the dose information included in the pre-set shooting conditions exceeds a threshold. (Composition 4) The information processing device according to configuration 3, wherein the threshold used for determining the image taken in the bone density measurement imaging is smaller than the threshold used for determining the image taken in the general imaging. (Composition 5) The notification control unit, The notification is displayed on the display unit. An information processing device according to any one of configurations 1 to 4, which displays on the display unit the shooting conditions that serve as the basis for determining that the acquired image was not taken under the pre-set shooting conditions. (Composition 6) The notification control unit, The notification is displayed on the display unit. The information processing device according to configuration 2 or 3, which highlights and displays on the display unit any shooting conditions at the time of taking the acquired image that do not match the pre-set shooting conditions. (Composition 7) The notification includes a notification prompting the user to retake the acquired image, as described in any of configurations 1 to 6, for the information processing device. (Composition 8) The information processing device according to any one of configurations 1 to 7, wherein the notification includes a notification to select whether to re-photograph all images relating to the inspection, including the photography of the acquired images, or to re-photograph only the images relating to the inspection that are determined not to have been photographed under the pre-set shooting conditions. (Composition 9) The information processing device according to any one of configurations 1 to 8, wherein the notification includes a notification indicating the items to be checked or the operating procedure for reshooting, corresponding to the shooting conditions that formed the basis for determining that the acquired image was not an image taken under the pre-set shooting conditions. (Composition 10) An information processing device according to any one of configurations 1 to 9, wherein, if the first image in bone density measurement imaging is determined to be an image taken under the pre-set imaging conditions, and the second image is determined not to be an image taken under the pre-set imaging conditions, the notification includes a notification instructing the operator to press the exposure switch of the radiation generator for a time corresponding to the pre-set imaging conditions. (Composition 11) An information processing device according to any one of configurations 1 to 10, wherein, if it is determined that the first image taken during bone density measurement is not an image taken under the pre-set shooting conditions, the notification includes a notification instructing the operator to check for abnormalities in the radiation generator. (Composition 12) A radiation detection device that detects radiation, A radiation imaging system comprising: an information processing device according to any one of configurations 1 to 11, which is communicably connected to the radiation detection device. (Method 1) A method for operating an information processing device that controls general radiography, which involves using a single radiation energy to photograph a subject and acquire one image, and bone densitometry radiography, which involves using multiple different radiation energies to photograph a subject and acquire multiple images, Acquiring the captured images, The process involves determining whether the acquired image was taken under pre-set shooting conditions, If it is determined that the acquired image was not taken under the pre-set shooting conditions, the system controls the notification sent to the operator indicating that the acquired image was not taken under the pre-set shooting conditions. A method for operating an information processing device, including the device itself. (Program 1) A program that, when executed by a computer, causes the computer to perform each step of the operation method of the information processing device described in Method 1.

[0081] Although the present disclosure has been described above with reference to embodiments, the present disclosure is not limited to the embodiments described above. Inventions modified to the extent that they do not contradict the spirit of the present disclosure, and inventions equivalent to the present disclosure are also included in the present disclosure. Furthermore, the embodiments described above can be combined as appropriate to the extent that they do not contradict the spirit of the present disclosure. [Explanation of symbols]

[0082] 100: Information processing device, 101: Image acquisition unit (acquisition unit), 104: Determination unit, 105: Output control unit (notification control unit)

Claims

1. An information processing device for controlling general radiography, which involves using a single radiation energy to photograph a subject and acquire one image, and bone densitometry radiography, which involves using multiple different radiation energies to photograph a subject and acquire multiple images, An acquisition unit that acquires the captured image, A determination unit that determines whether the acquired image was taken under pre-set shooting conditions, If it is determined that the acquired image was not taken under the pre-set shooting conditions, a notification control unit controls a notification to the operator indicating that the acquired image was not taken under the pre-set shooting conditions. An information processing device equipped with the following features.

2. The acquisition unit acquires the shooting conditions at the time the acquired image was taken, The information processing apparatus according to claim 1, wherein the determination unit performs the determination by comparing the shooting conditions at the time of shooting with the pre-set shooting conditions.

3. The information processing apparatus according to claim 2, wherein the determination unit determines that the acquired image is not an image taken under the pre-set shooting conditions if the difference between the dose information included in the shooting conditions at the time of acquisition of the acquired image and the dose information included in the pre-set shooting conditions exceeds a threshold.

4. The information processing apparatus according to claim 3, wherein the threshold used for determining the image taken in the bone density measurement imaging is smaller than the threshold used for determining the image taken in the general imaging.

5. The notification control unit, The notification is displayed on the display unit. The information processing apparatus according to claim 1, which displays on the display unit the shooting conditions that serve as the basis for determining that the acquired image was not taken under the pre-set shooting conditions.

6. The notification control unit, The notification is displayed on the display unit. The information processing apparatus according to claim 2, which highlights and displays on the display unit any shooting conditions at the time of taking the acquired image that do not match the pre-set shooting conditions.

7. The information processing apparatus according to claim 1, wherein the notification includes a notification prompting the user to retake the acquired image.

8. The information processing apparatus according to claim 1, wherein the notification includes a notification for selecting whether to re-photograph all images relating to the inspection, including the photography of the acquired images, or to re-photograph only the images relating to the inspection that are determined not to have been photographed under the pre-set shooting conditions.

9. The information processing apparatus according to claim 1, wherein the notification includes a notification indicating the items to be confirmed or the operating procedure for reshooting, corresponding to the shooting conditions that formed the basis for determining that the acquired image was not an image taken under the pre-set shooting conditions.

10. The information processing device according to claim 1, wherein if the first image in the bone density measurement imaging is determined to be an image taken under the pre-set imaging conditions, and the second image is determined not to be an image taken under the pre-set imaging conditions, the notification includes a notification instructing the operator to press the exposure switch of the radiation generator for a time corresponding to the pre-set imaging conditions.

11. The information processing device according to claim 1, wherein, if it is determined that the first image taken in the bone density measurement imaging is not an image taken under the pre-set imaging conditions, the notification includes a notification instructing the operator to check for an abnormality in the radiation generator.

12. A radiation detection device that detects radiation, A radiation imaging system comprising an information processing device according to any one of claims 1 to 11, which is communicably connected to the radiation detection device.

13. A method for operating an information processing device that controls general radiography, which involves photographing a subject using a single radiation energy to acquire one image, and bone densitometry radiography, which involves photographing a subject using multiple different radiation energies to acquire multiple images, Acquiring the captured images, The process involves determining whether the acquired image was taken under pre-set shooting conditions, If it is determined that the acquired image was not taken under the pre-set shooting conditions, the system controls the notification sent to the operator indicating that the acquired image was not taken under the pre-set shooting conditions. A method for operating an information processing device, including the device itself.

14. A program that, when executed by a computer, causes the computer to perform each step of the operation method of the information processing device described in claim 13.

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