JP6397207B2 - Round-trip car, its control method, and program - Google Patents

Description

  The present invention relates to an X-ray imaging apparatus, an operation method thereof, and a program, and more particularly to a technique for recalling an image captured of a subject for reference of imaging.

  As a medical X-ray imaging apparatus, an apparatus that captures a digital image using a solid-state imaging apparatus has been developed as described in Patent Document 1. By using the digital image acquired in this way, efficiency of filing, practical use of remote diagnosis, and improvement of medical technique / efficiency are achieved. Further, as described in Patent Document 2, a portable X-ray imaging apparatus equipped with a solid-state imaging device has also been developed. When such a solid-state imaging device is used, it is possible to move to a bedside of a subject who cannot move due to his / her foot and can perform imaging.

JP-A-9-098970 JP 2011-41812 A

  When X-ray imaging is performed, particularly when a portable X-ray imaging apparatus is used, it is important to perform imaging with the same positioning and imaging conditions. Particularly in the field of orthopedics, it is important for interpretation to align the position of the plate for fixing the fractured bone with the previous imaging.

  However, in particular, when a round trip is performed without being connected to a network using a portable X-ray imaging apparatus, past captured images cannot be acquired from the server, so that past imaging is performed in order to confirm the positioning at the time of past imaging. The image could not be displayed. For example, when imaging is performed in a hospital room using an X-ray imaging apparatus that performs communication via a network cable, communication cannot be performed unless the network environment exists in the hospital room. Further, even if the X-ray imaging apparatus can perform wireless communication, communication cannot be performed in a place where the radio does not reach or where the radio cannot be used. Furthermore, even with an X-ray imaging apparatus that can always be connected to a network, it may take time to acquire an image from the server via the network, and if an attempt is made to acquire a past image during the inspection, the inspection cannot be performed quickly. It led to making the patient wait.

  An object of the present invention is to enable an operator to perform X-ray imaging while confirming a captured image of a subject regardless of a network environment.

In order to achieve the object of the present invention, for example, the round-trip wheel of the present invention has the following configuration. That is,
A round-trip vehicle comprising X-ray generation means and X-ray detection means, capable of moving and performing X-ray imaging,
Instruction acquisition means for acquiring an imaging instruction for specifying an imaging condition for the subject and X-ray imaging;
Image acquisition means for acquiring a previously acquired X-ray image corresponding to the specified subject and imaging conditions from an external device and storing the acquired X-ray image in a storage means before the round visit;
Before the X-ray imaging, a control unit that reads X-ray images captured in the past corresponding to the subject to be imaged and the imaging conditions from the storage unit, and displays on the display unit;
It is characterized by providing.

  It is possible for an operator to perform X-ray imaging while confirming a captured image of a subject regardless of the network environment.

1 is a diagram illustrating an X-ray imaging apparatus according to Embodiment 1. FIG. 1 is a functional block diagram of an X-ray imaging apparatus according to Embodiment 1. FIG. The figure which shows an example of the selection screen which displays a photography order. The figure which shows an example of the imaging | photography screen displayed in an imaging | photography possible state. The figure which shows an example of an imaging | photography order. 5 is a flowchart of processing according to the first embodiment. FIG. 4 is a functional block diagram of an X-ray imaging apparatus according to Embodiment 2. 5 is a flowchart of processing according to the first embodiment. FIG. 6 is a diagram illustrating an X-ray imaging apparatus according to a third embodiment. The figure which shows the structural example of the round-trip car which concerns on one Embodiment. The figure which shows the structural example of the support | pillar part of the roundabout car which concerns on one Embodiment. The figure which shows the structural example of the common part of the 1st support | pillar and 2nd support | pillar which concern on one Embodiment. The figure which shows the structural example of the common part of the 1st support | pillar and 2nd support | pillar which concern on another embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the scope of the present invention is not limited to the following embodiments, and various modifications and changes can be made within the scope of the gist.

[Embodiment 1]
FIG. 1 shows an X-ray imaging apparatus 100 according to the first embodiment and a hospital network 110 to which the X-ray imaging apparatus 100 is connected. The X-ray imaging apparatus 100 can capture a transmission image of a subject, specifically an X-ray image. The X-ray imaging apparatus 100 is portable and can be moved. The X-ray imaging apparatus 100 includes a network connection unit 80 and can be connected to the network 110 via the network connection unit 80. In the present embodiment, the network 110 and the X-ray imaging apparatus 100 are connected via the network cable by inserting the network cable into the network connection unit 80.

  As will be described later, the X-ray imaging apparatus 100 includes an X-ray generation unit, an operation / display unit, an X-ray detection unit, and a control unit. Further, the X-ray imaging apparatus 100 includes a captured image storage unit 70 and a reference image storage unit 72, as will be described later.

  The network 110 is connected to an HIS (In-Hospital Information System) / RIS (Radiology Information System) 120 and a PACS (Image Storage Communication System) 130. The HIS / RIS 120 is an information processing system. When a doctor inputs an imaging order to the HIS / RIS 120, the X-ray imaging apparatus 100 can acquire the imaging order from the HIS / RIS 120. The PACS 130 is a system that manages images, and includes a server that stores images, a diagnostic image processing workstation, a high-definition monitor, and the like that are located outside the X-ray imaging apparatus 100. The X-ray imaging apparatus 100 can store the captured image in the PACS 130 by transmitting the captured image to the PACS 130. Further, the X-ray imaging apparatus 100 can acquire captured images captured in the past from the PACS 130.

  FIG. 2 is a block diagram illustrating a configuration of the X-ray imaging apparatus 100. The operation / display unit has an operation / display unit 62. The operation / display unit 62 can display various information such as a captured image, a user interface for operating the X-ray imaging apparatus 100, and the state of the X-ray imaging apparatus 100. Further, the operation / display unit 62 functions as an operation console of the X-ray imaging apparatus 100 and can receive an input from an operator who is a user of the X-ray imaging apparatus 100. The operation / display unit 62 may be a liquid crystal panel including a touch sensor, for example.

  The X-ray generation unit has an X-ray tube 171 that generates X-rays. The X-ray tube 171 is controlled by the X-ray generator control unit 61 included in the control unit. Specifically, the X-ray generator control unit 61 generates X-rays by applying a high voltage to the X-ray tube 171 in accordance with imaging conditions such as a set tube current, tube voltage, and irradiation time. Such an imaging condition can be set by the operator via the operation / display unit 62.

  The X-ray detection unit has an X-ray detection device 172. The X-ray detection device 172 detects X-rays emitted from the X-ray tube 171 and transmitted through the subject 109. The X-ray detection device 172 includes an X-ray detector 173, an exposure control device (AEC device), a grid, and an A / D converter.

  The X-ray detector 173 detects X-rays in order to obtain a digital image. In the present embodiment, the X-ray detector 173 includes a scintillator that converts X-rays into light, and a solid-state imaging device that generates an electrical signal corresponding to the intensity of the light. The X-ray detection device 172 may be installed on a standing stand or a bed stand, but in this embodiment, the X-ray detection device 172 is a cassette-type device and can be brought into the bedside of the subject. To do.

  The AEC apparatus detects the irradiated radiation in order to appropriately irradiate an amount of radiation necessary for imaging while minimizing exposure to the human body. Specifically, the AEC device is disposed between the grid and the X-ray detector 173, detects a part of the radiation through the subject 109 and the grid, and generates an AEC signal obtained by the detection as an X-ray. Transfer to the device controller 61. When the integrated value of the transferred AEC signal exceeds the threshold value, the X-ray generator control unit 61 stops the generation of radiation from the X-ray tube 171. In this way, the AEC device appropriately controls the radiation dose. The grid is for removing scattered radiation.

  When X-rays enter the X-ray detection device 172 from the X-ray tube 171, first, scattered X-rays generated by the subject 109 are removed by the grid. X-rays that have passed through the grid are converted into light by a scintillator, and an electrical signal corresponding to the intensity of light is generated by a solid-state imaging device. The generated electric signal is converted into a digital signal by an A / D converter, and thus a digital X-ray image is obtained.

  The control unit includes an imaging order receiving unit 50, a past image acquisition unit 51, a past image receiving unit 52, a past image management unit 53, a past image calling unit 54, an image capture control unit 55, an image processing unit 56, and an X-ray imaging apparatus. A control unit 57 and an image transfer unit 58 are provided. The control unit further includes a captured image storage unit 70 and a past image storage unit 71. Details of these units will be described in detail with reference to the flowchart of FIG.

  Under the control of the X-ray imaging apparatus control unit 57, reading of a digital image signal obtained from the X-ray detection apparatus 172, predetermined image processing, image display, image output, and the like are performed. Such a control unit can be realized using a general-purpose computer including a processor and a memory. That is, this program is loaded into a memory from a storage medium that stores a computer program including instructions for executing the processing described above and later. The operation of the control unit can be realized by the processor operating according to the program loaded in the memory.

  3 and 4 are examples of screens displayed on the operation / display unit 62. FIG. FIG. 3 is a selection screen for the operator to select a shooting condition. The selection screen includes a message / status display area 30, an imaging condition button 31, an imaging condition display area 32, a subject information display area 34, a subject list 20, a list update button 21, and an imaging start button 22. . The selection screen is displayed according to the imaging order sent from the HIS / RIS 120 via the network 110.

  In the subject list 20, subject information based on the imaging order sent from the HIS / RIS 120 via the network 110 is displayed. The imaging order is an X-ray imaging instruction by a doctor, and the subject and imaging conditions are specified.

  When a desired subject is selected from the subject list 20, an imaging condition button 31 corresponding to the imaging condition included in the imaging order for that subject is displayed in the imaging condition display area 32. In the case of FIG. 3, imaging condition buttons 31 corresponding to the humerus AP imaging and the humerus LR imaging are displayed. In the message / status display area 30, a message from the X-ray imaging apparatus 100, the status of the X-ray imaging apparatus 100, or the like is displayed. In the subject information display area 34, subject information about the subject selected from the subject list 20 is displayed. The list update button 21 is a button for receiving the latest imaging order from the HIS / RIS 120 and updating the selection screen.

  In FIG. 3, when the subject is selected and the imaging start button 22 is pressed, the screen changes to the imaging screen of FIG. 4 and the X-ray imaging apparatus 100 enters the imaging enabled state. In the present embodiment, the operator can select the shooting condition by pressing the shooting condition button 31. In addition, various imaging parameters are preset for each imaging condition (for each imaging region and imaging technique). For this reason, the shooting parameters are automatically determined by selecting the shooting conditions. When an X-ray irradiation button (not shown) provided in the X-ray imaging apparatus 100 is pressed while the imaging screen is displayed, X-rays are irradiated and imaging is performed.

  The imaging screen of FIG. 4 includes a message / state display area 30, an imaging condition button 31, an imaging condition display area 32, and a subject information display area 34, as in the selection screen. The shooting screen further includes an image display area 33, a shooting condition display area 35, a shooting condition change button 36, a shooting end button 39, a past image call button 40, and a past shooting condition display area 41.

  A captured image captured in the past for the subject can be displayed on the imaging screen. In the present embodiment, when the past image call button 40 is pressed, a past photographed image photographed in accordance with the photographing conditions used this time is displayed in the image display area 33. In the image display area 33 of FIG. 4, past captured images corresponding to the subject ID: 00100, patient name: Hanako Suzuki, and imaging region: humerus selected in FIG. 3 are displayed. In FIG. 4, a photographed image of humerus AP photographed in the past is displayed. In the past photographing condition display area 41, photographing conditions used when photographing the photographed image displayed in the image display area 33 are displayed.

  In the imaging condition display area 35, default imaging conditions (tube voltage 54 kV, tube current 100 mA, irradiation time 80 msec, SOD 90 cm) for preset humerus AP imaging are displayed as initial values. Here, SOD is an abbreviation for Source To Object Distance, which is the distance between the X-ray generation source and the subject. Different SOD means that the enlargement ratio of the image is different. The shorter the SOD, the larger the enlargement ratio. This shooting condition can be changed by pressing the shooting condition change button 36. In order to complete all shooting and exit the shooting enabled state, the shooting end button 39 is pressed.

  FIG. 5 shows an example of an imaging order transferred from the HIS / RIS 120 to the X-ray imaging apparatus 100. The imaging order shown in FIG. 5 includes subject information, examination information, and imaging information, and may include a plurality of examination information for one subject information and a plurality of imaging information for one examination information. Is possible. The shooting information specifically indicates shooting conditions. A combination of one piece of imaging information and corresponding examination information and subject information corresponds to one imaging instruction from the doctor, and indicates a combination of the subject and the imaging conditions in one imaging. In the example of FIG. 5, an examination including humeral AP imaging and humerus LR imaging and an examination including KUB AP imaging are ordered in one imaging order. KUB imaging is an abbreviation for Kidney (kidney), Ureter (ureter), and Blader (bladder), and is an imaging condition classified as abdominal imaging.

  The subject information includes a patient ID, a patient name, a sex, and a date of birth. The inspection information is composed of the inspection date and time. The shooting information includes a protocol ID, a protocol name, a modality type, a shooting type, and detailed conditions. The protocol ID is a 9-digit code, and is composed of a combination of an examination part code, a posture code, and an irradiation direction code. Each of the examination part code, the posture code, and the irradiation direction code is defined by the definition file. The protocol name indicates an imaging protocol, and a name combining an imaging part name, an imaging technique name, an imaging direction, and the like is used. The modality type represents the type of device used for shooting. Specifically, DICOM defines CR (Computed Radiography), DX (Digital Radiography), RF (Radiography Fluoroscopy), CT (Computed Tomography), and the like. The shooting type indicates whether shooting is in a standing position, shooting in a prone position, or shooting in a cassette.

  FIG. 6 is a flowchart illustrating a processing procedure in the first embodiment. Before starting the processing of FIG. 6, the doctor who is the imaging client inputs an imaging order on the terminal of the HIS / RIS 120. Specifically, the doctor determines a subject to be imaged and determines an imaging region, imaging conditions, and the like. In addition, the doctor also inputs the type of modality used for imaging, the examination execution date, the examination execution time, and the like. Thus, the imaging order information shown in FIG. 5 is created and recorded in the HIS / RIS 120. The imaging order information in FIG. 5 indicates that humerus AP imaging, humerus LR imaging, and KUB AP imaging are performed in this order.

  In step S <b> 100, the imaging order receiving unit 50 acquires imaging order information from the HIS / RIS 120. As described with reference to FIG. 5, the imaging order information includes one or more imaging instructions including information for specifying the subject and information for specifying the imaging conditions. Done. In this step, a radiographer or doctor who is an operator of the X-ray imaging apparatus 100 connects a hospital network cable to the network connection unit 80 of the X-ray imaging apparatus 100 before going to the round. The X-ray imaging apparatus 100 can communicate with the HIS / RIS 120 via a network cable. In this state, when the list update button 21 is pressed on the selection screen shown in FIG. 3, the imaging order receiving unit 50 notifies the HIS / RIS 120 of the imaging order acquisition event via the network 110.

  This imaging order acquisition event serves as a trigger for the HIS / RIS 120 to transmit imaging order information to the imaging order receiving unit 50. The shooting order acquisition event may be notified with a narrow-down key for narrowing down the shooting order to be acquired. For example, an inspection date, an inspection start time, or a modality type can be used as a narrow-down key. The HIS / RIS 120 transfers, to the X-ray imaging apparatus 100, a list of imaging orders having information corresponding to the narrow-down key among the imaging orders registered in the HIS / RIS 120 in response to the imaging order acquisition event.

  In step S <b> 101, the imaging order receiving unit 50 determines whether all of the imaging order lists sent from the HIS / RIS 120 have been received. If reception has been completed, the process proceeds to step S102. If reception has not been completed, the determination in step S101 is repeated until reception is completed.

  In step S <b> 102, the past image acquisition unit 51 issues an event for acquiring an image obtained by photographing the subject to the PACS 130. In step S <b> 103, the past image receiving unit 52 receives an image (past image) obtained by photographing the subject from the PACS 130. In this way, the past image receiving unit 52 acquires from the PACS 130 an X-ray image (past image) taken in the past corresponding to one or more of the imaging conditions received by the X-ray imaging apparatus 100. In the present embodiment, the acquisition of the past image is performed immediately after the imaging order is received. In the present embodiment, the past image is acquired without receiving an instruction from the outside such as an operator after the photographing order is received. In the present embodiment, the past image receiving unit 52 acquires an X-ray image obtained by imaging a subject in the past. However, if the acquired image is an image that serves as a reference for X-ray imaging. There is no particular limitation.

  In the present embodiment, the past image receiving unit 52 acquires a past image corresponding to the shooting condition included in the shooting order acquired in step S101 from the PACS 130. Specifically, the past image reception unit 52 selectively acquires from the PACS 130 an X-ray image corresponding to the subject and the imaging conditions specified by the imaging instruction included in the imaging order received in step S100. . However, the past image receiving unit 52 may acquire a past image corresponding to the imaging conditions included in the imaging order received by the X-ray imaging apparatus 100 in the past.

  Specifically, the past image acquisition unit 51 sends an event for acquiring a past image and shooting information to the PACS 130. For example, as shown in FIG. 3, a case is considered in which shooting orders for three people, Hanako Suzuki, Taro Yamada, and Jiro Tanaka, are acquired in step S100. In this case, the past image acquisition unit 51 issues, for each subject, an event for acquiring a past image captured according to the ordered imaging conditions and imaging information thereof. The PACS 130 interprets the contents of the event, finds the requested past image and its shooting information from the image server, and transfers them to the past image receiving unit 52.

  The past image receiving unit 52 acquires, from the PACS 130, an X-ray image captured in the past using the imaging conditions indicated in the imaging order acquired in step S101 for the subject indicated in the imaging order acquired in step S101. To do. The past image receiving unit 52 further acquires from the PACS 130 imaging information indicating the subject and imaging conditions for the past image. However, it is not essential that the shooting conditions of the past image completely match the shooting conditions indicated in the shooting order. For example, the past image receiving unit 52 may acquire a past image having a higher degree of coincidence of shooting conditions from the PACS 130. Referring to the example of FIG. 5, regarding the patient name, protocol name, modality type, and imaging type, it is usually required that the imaging conditions of the past image and the imaging conditions of the imaging order match. On the other hand, the detailed conditions do not have to match completely. Further, it is not necessary to match the inspection date and time. In the present embodiment, a past image in which at least the patient name and the imaging region match is acquired as an X-ray image corresponding to the subject specified by the imaging instruction and the imaging conditions. However, in other embodiments, X-ray images may be acquired based on other criteria.

  Note that the DICOM standard used in medical image communication handles image files to which subject information and imaging information are added as tags. For this reason, if the past image is acquired under the DICOM standard, the subject information and the photographing information can be obtained at the same time. In the following, it is assumed that subject information and imaging information are added to the past image.

  Here, since the SOD value is different between the standing position shooting, the supine position shooting, and the shooting using the cassette, the enlargement ratios of the captured images obtained by the respective shootings are different. Therefore, the past image receiving unit 52 may acquire a past image captured with an SOD closer to the current imaging condition. Specifically, the past image receiving unit 52 adds the desired SOD value to the event for acquiring the past image, so that the past image in which the SOD closer to the added value is recorded as the shooting information is transmitted from the PACS 130. The

  In step S <b> 103, the past image management unit 53 stores the past image and shooting information acquired from the PACS 130 in the past image storage unit 71. The past image management unit 53 can call a past image stored in the past image storage unit 71 as a reference image at the time of shooting. When the past image acquired in step S102 is already stored in the captured image storage unit 70, the past image management unit 53 stores the acquired past image in the past image storage unit 71 in order not to store the image twice. It is not necessary to store. The determination of whether or not the images are the same can be made with reference to, for example, subject information and imaging information added to the past image. Further, the past image management unit 53 may perform compression processing on the past image or reduce the number of pixels of the past image and save it in order to reduce the memory usage.

  In the present embodiment, the past image and the shooting information are acquired at the timing when the list of shooting orders is received from the HIS / RIS 120 in step S100. However, the past image and the shooting information may be acquired at different timings. For example, a past image and shooting information may be acquired according to an instruction from the operator. As an example, on the selection screen shown in FIG. 3, the operator can select one or more imaging conditions or subject information and press a past image acquisition button (not shown). In this case, a past image and imaging information corresponding to the selected imaging condition or the imaging condition instructed to be performed on the selected subject may be acquired. In this case, it is possible to acquire only the past images necessary for photographing to be performed, so that the time required to acquire the past images can be shortened and the memory can be used efficiently.

  The past image management unit 53 may store only past images having shooting information that matches the conditions in the past image storage unit 71. In the present embodiment, the X-ray imaging apparatus 100 can perform X-ray imaging using a cassette type apparatus. On the other hand, the X-ray imaging apparatus 100 in the present embodiment is not used for standing imaging. Therefore, it is possible that the X-ray imaging apparatus 100 does not need to refer to a past image whose imaging type is shown to be standing in the imaging information. Therefore, the past image management unit 53 can store in the past image storage unit 71 only the past image that indicates that the shooting type is cassette.

  The past image management unit 53 may determine whether or not to store the past image in the past image storage unit 71 with reference to the photographing order. Specifically, the past image management unit 53 may store only X-ray images whose imaging conditions match a predetermined condition in the past image storage unit 71. For example, the shooting order shown in FIG. 5 includes KUB AP shooting as the third shooting condition, but the shooting type is standing and not cassette. Therefore, the past image management unit 53 may determine not to store the past image acquired corresponding to the third shooting condition in the past image storage unit 71. On the other hand, the past image management unit 53 stores, in the past image storage unit 71, past images acquired corresponding to the first and second shooting conditions that indicate that the shooting type is cassette. Can do.

  In another embodiment, the past image receiving unit 52 extracts an imaging instruction whose imaging conditions match a predetermined condition, and obtains an X-ray image corresponding to the subject specified by the extracted imaging instruction and the imaging conditions. An event to be acquired selectively may be issued. Specifically, the past image acquisition unit 51 may request that only past images corresponding to the first and second shooting conditions indicated that the shooting type is cassette be transmitted. Thus, by acquiring and storing the past image used at the time of shooting with reference to the shooting order or shooting information, it is possible to efficiently use the memory and to refer to an appropriate past image at the time of shooting. .

  In step S104, inspection is started. When the acquisition of the imaging order and the corresponding past image necessary until step S103 is completed, the network cable is disconnected from the network connection unit 80. Then, the X-ray imaging apparatus 100 is carried to a room where a subject to be imaged is waiting, for example, a hospital room. The operator selects a subject to be photographed from the subject list 20 of FIG. 3 while checking the subject in the hospital room.

  When the operator presses the imaging start button 22, the X-ray imaging apparatus 100 shifts to an imaging enabled state. Then, the screen shown in FIG. 4 is displayed on the operation / display unit 62. The operator selects the shooting condition by pressing the shooting condition button 31. As shown in FIG. 5, since the subject information is linked to the photographing condition, and the combination of the photographing condition and the subject information corresponds to the photographing instruction, the selection of the photographing condition requires the photographing instruction. This corresponds to selecting an instruction to be selected. The operation / display unit 62 selects one of the shooting instructions included in the shooting order according to the selection of the shooting condition by the operator. In the imaging condition display area 35, the imaging condition of the humerus AP, which is the selected imaging condition, is displayed.

  In step S <b> 105, the past image calling unit 54 acquires the past image corresponding to the selected shooting condition and its shooting information from the past image storage unit 71 or the shot image storage unit 70. In the present embodiment, the acquisition of the past image is started in response to the operator pressing the past image call button 40. Similar to step S102, the past image calling unit 54 obtains a past image captured according to the selected imaging condition and its imaging information for the selected subject. That is, it is possible to select past images taken by the same method for the same portion of the same subject. Here, the selected subject and the selected imaging condition correspond to the subject and the imaging condition specified by the selected imaging instruction. The selection of the past image corresponding to the selected shooting condition in step S105 can be performed in the same manner as in step S102 with reference to shooting information about the past image. As described above, the past image is already stored in the past image storage unit 71 or the captured image storage unit 70 before the shooting instruction is selected in step S104.

  However, the past image management unit 53 can also store the past image received by the past image receiving unit 52 and corresponding to the shooting condition in the past image storage unit 71 in association with the shooting condition. In this case, the past image calling unit 54 can acquire a past image associated with the selected shooting condition from the past image storage unit 71.

  The past image calling unit 54 causes the operation / display control unit 60 to display the acquired past image in the image display area 33, thereby presenting the acquired past image to the operator. Further, the past image calling unit 54 causes the operation / display control unit 60 to display the acquired shooting information in the past shooting condition display area 41, thereby presenting the acquired shooting information to the operator.

  Corresponds to the case where there is a past image corresponding to the selected shooting condition in both the past image storage unit 71 and the shot image storage unit 70, or to the shooting condition selected in the past image storage unit 71 or the shot image storage unit 70 There may be a case where there are two or more past images. In such a case, the past image calling unit 54 can select the latest past image. The past image calling unit 54 may cause the operation / display control unit 60 to display a selection dialog on the operation / display unit 62 and allow the operator to select a past image to be displayed.

  The operator positions the subject 109 with respect to the X-ray detection apparatus 172 so as to be at the same position as in the past imaging with reference to the past image. In the humerus AP imaging, the position of the subject 109 is aligned so that the directions of the metal plates that support the fractured portion are the same so that comparative interpretation is easy. Further, the operator can confirm whether or not the current photographing condition is appropriate with reference to the past photographing condition displayed in the past photographing condition display area 41. Further, the operator moves the X-ray tube 171 so as to make the positional relationship between the subject and the tube appropriate, and adjusts the irradiation field stop so that X-rays are not irradiated to other than the target site. be able to.

  On the other hand, when the X-ray imaging apparatus 100 shifts to the imaging enabled state, the image capture control unit 55 sends a control signal to the solid-state imaging device and applies a voltage. In this way, the image capture control unit 55 controls the solid-state imaging device so as to be able to detect the incident X-ray, and displays the message “Ready” in the message / status display area 30 indicating that the imaging preparation is completed. Display.

  Further, the X-ray imaging apparatus control unit 57 performs the X-ray imaging apparatus according to various parameters corresponding to the imaging conditions selected on the selection screen or various parameters corresponding to the imaging conditions changed using the imaging condition change button 36. 100 parts are controlled. In this way, the X-ray generation unit and the X-ray detection unit are controlled to stand by in a state where imaging according to the designated parameters is possible. Here, the various parameters include imaging parameters, image processing parameters, correction processing parameters, generator setting parameters, and the like.

  In step S106, X-ray irradiation and X-ray image acquisition are performed. In the present embodiment, the operator presses an X-ray irradiation button (not shown) installed near the operation / display unit 62. The X-ray irradiation button serves as a trigger for generating X-rays by the X-ray tube 171, and an irradiation signal is generated when the operator presses the X-ray irradiation button. The generated irradiation signal is first supplied to the image capture control unit 55. The image capture control unit 55 that has received the irradiation signal refers to the drive notification signal from the solid-state image sensor to determine whether or not the solid-state image sensor can detect X-rays from the X-ray tube 171. Check. Thereafter, the image capture control unit 55 sends an irradiation permission signal to the irradiation switch. With this irradiation permission signal, the irradiation permission switch is turned on, and the irradiation signal generated by the irradiation button is supplied to the X-ray generator control unit 61. In the present embodiment, the X-ray irradiation button has two switches, and an irradiation signal is generated when the second switch of the X-ray irradiation button is pressed.

  When receiving the irradiation signal, the X-ray generator control unit 61 sends the irradiation signal to the X-ray tube 171. Thus, X-rays are generated from the X-ray tube 171. At this time, the X-ray generator control unit 61 controls the X-ray tube 171 so as to emit X-rays according to the designated parameters. The X-ray generator control unit 61 can control the X-ray tube 171 so as to irradiate X-rays for a time specified by the parameters. On the other hand, when the total sum of the X-ray signals detected by the AEC apparatus in the selected area reaches a predetermined amount, the X-ray generator control unit 61 sends the X-rays from the X-ray tube 171. Cut off the occurrence.

  X-rays from the X-ray tube 171 are focused by an irradiation field stop (not shown), pass through the subject 109 and a grid (not shown), and enter a scintillator (not shown). Then, a transmission image of the subject 109 represented by light derived from the X-ray and generated from the scintillator is formed on the solid-state imaging device. Then, an image signal is obtained by photoelectric conversion in the solid-state imaging device. This image signal is digitized by an A / D converter and is captured by the image capture control unit 55 as a digital image signal. In this way, after the past image is presented to the operator, the X-ray generation unit is set according to the parameters specified by the imaging instruction (subject information and imaging conditions), the parameters specified by the operator, and user control. The X-ray detection unit captures an X-ray image.

  The image processing unit 56 performs various types of image processing on the captured image. Image processing includes processing for compensating for variations among photoelectric conversion elements constituting the sensor, processing for compensating changes in sensor element sensitivity over time, scattered ray correction processing, grid correction processing, and the like. In addition, processing for extracting a region of interest, processing for extracting an irradiation field, and processing for extracting a missing portion of an X-ray (an image portion corresponding to an X-ray that did not hit the subject) from the image thus obtained , Etc. are also performed. Furthermore, there are a process of cutting an image into a desired size based on the extracted irradiation field region, a process of generating an image of a desired gradation by performing gradation correction using a desired density characteristic curve, and the like. Done. The captured image created by the image processing unit 56 is displayed on the operation / display unit 62. For example, a captured image can be displayed in the image display area 33. However, the past image already displayed and the captured image created by the image processing unit 56 may be simultaneously displayed for comparison. The image processing unit 56 stores the created captured image in the captured image storage unit 70 together with the captured information. Furthermore, the image processing unit 56 may store the captured image before the clipping process in the captured image storage unit 70 in order to make reference for positioning alignment.

  In step S107, the operator determines whether or not an appropriate captured image has been obtained by checking the captured image. For example, by referring to the photographed image, it is confirmed whether the subject is not blurred, the granularity is at an appropriate level, the posture of the subject is correct, the contrast is appropriate, the density is appropriate, etc. be able to. If the captured image is not appropriate, the operator can perform X-ray imaging again or adjust the image processing parameters used by the image processing unit 56. When it is determined that X-ray imaging is necessary again, the operator instructs the X-ray imaging apparatus 100 to perform X-ray imaging again via the operation / display unit 62. In this case, the process returns to step S105. If the operator determines that an appropriate captured image has been obtained, the process proceeds to step S108. The X-ray imaging apparatus 100 may determine that an appropriate captured image has been obtained when an instruction to perform X-ray imaging again is not given from the operator, or an appropriate captured image can be obtained for the operator. It may be requested to make an input indicating whether or not it has been made.

  In step S <b> 108, it is determined whether or not all imaging for the selected subject has been completed. In the example of FIG. 4, when it is determined that both the humerus AP imaging and the humerus LR imaging have been completed, the operator presses the imaging end button 39. Then, the X-ray imaging apparatus 100 determines that all imaging has been completed, and the process proceeds to step S109. Thus, the imaging for the selected subject is completed. If all the shootings have not been completed, the operator presses the shooting condition button 31 corresponding to the shooting conditions that have not been shot yet. Then, the X-ray imaging apparatus 100 determines that all imaging has not been completed, and the process returns to step S105.

  The operator can perform imaging for patients in each room by repeating steps S104 to S108. After the imaging is completed, in step S109, the operator moves the X-ray imaging apparatus 100 to a place where a network can be connected. Then, the operator connects the X-ray imaging apparatus 100 to the network 110 by connecting a network cable to the network connection unit 80. When the network connection is established, the image transfer unit 58 reads the captured image and the captured information from the captured image storage unit 70 and transmits them to the PACS 130. Thus, the photographed image is stored in the PACS 130 and can be used as a past image for reference when photographing again. The image transfer unit 58 may also output the read captured image to the printer 140.

  In step S <b> 110, the past image management unit 53 can delete the past image stored in the past image storage unit 71. For example, the past image management unit 53 can delete a past image referred to when an image is captured. Specifically, after an X-ray image is captured in accordance with the imaging instruction, the past image management unit 53 deletes the past image corresponding to the subject and the imaging conditions specified by the imaging instruction from the past image storage unit 71. can do. In another embodiment, the past image management unit 53 stores in the past image storage unit 71 except for past images corresponding to shooting conditions that have not yet been shot out of the shooting orders received by the shooting order receiving unit 50. It is possible to delete past images. The file size of past images is often large, and if unnecessary past images are stored, the memory is compressed, but by deleting unnecessary past images, the memory can be used efficiently.

  The case where a portable X-ray imaging apparatus that cannot always be connected to the network is used as the X-ray imaging apparatus 100 has been described above. However, the method of this embodiment can also be used effectively in an X-ray imaging apparatus that can be connected to a network by a wireless LAN. For example, even when a device equipped with a wireless LAN is used in a place where wireless does not reach or used in a room where wireless cannot be used, a past image corresponding to the time of receiving a photographing order is obtained while referring to the past image. Shooting can be performed.

  In addition, the method of the present embodiment can also be effectively used in an X-ray imaging apparatus that is always connected to a network, such as a stationary X-ray imaging apparatus. For example, even if an attempt is made to acquire a past image after the photographing start button 22 is pressed, the response may be slow due to the influence of network traffic or the performance of the image server, which causes the subject to wait. . On the other hand, it is possible to prevent the time required for the inspection from becoming long by acquiring the past image corresponding to the reception of the imaging order.

  In the present embodiment, the X-ray imaging apparatus 100 has been described as an apparatus that captures a still image. However, the same effect can be obtained even if the X-ray imaging apparatus 100 is an apparatus for performing fluoroscopy or an apparatus for capturing a moving image.

  According to the present embodiment described above, it is possible to acquire and store captured images captured in the past when reading the imaging order before the round. Accordingly, it is possible to check past photographed images regardless of the network environment at the time of photographing, so that appropriate photographing becomes easy. Further, since past images are deleted after shooting, a memory for holding images can be used efficiently.

[Embodiment 2]
FIG. 7 shows the X-ray imaging apparatus 100 according to the second embodiment and a hospital network 110 to which the X-ray imaging apparatus 100 is connected. The same components as those in the X-ray imaging apparatus 100 according to the first embodiment shown in FIG. Hereinafter, detailed description of the same configuration as that of the first embodiment will be omitted.

  The X-ray imaging apparatus 100 according to the present embodiment has a reference image storage unit 72. The reference image storage unit 72 stores a reference image that shows an example of an X-ray image captured under each imaging condition. The reference image can be, for example, an X-ray image serving as a model corresponding to the imaging region and the imaging technique. When performing the first X-ray imaging of a subject, such as in the case of a first visit, there is no corresponding past image, so it is possible to refer to the past image. In this embodiment, in such a case, by displaying a reference image instead of the past image, it becomes easy to optimally position the subject, set the tube position, and set the imaging conditions, and easily interpret the image. An image can be easily taken.

  FIG. 8 shows a flowchart of processing in the present embodiment. Processes other than steps S200 and S201 are the same as those in the first embodiment, and are denoted by the same reference numerals. Detailed description of these processes is omitted.

  The process of step S200 is started in response to the operator pressing the past image call button 40. The past image calling unit 54 determines whether or not an X-ray image corresponding to the subject specified by the selected imaging instruction and the imaging condition is stored in the past image storage unit 71 for the selected subject. Determine whether. For example, the past image calling unit 54 can determine whether or not a past image shot according to the selected shooting condition is stored in the past image storage unit 71. Here, the past image captured in accordance with the selected imaging condition for the selected subject is a past image acquired from the past image storage unit 71 by the past image calling unit 54 in the first embodiment. Point to. If such a past image is stored, the process proceeds to step S105, and the past image calling unit 54 acquires the past image from the past image storage unit 71 as in the first embodiment. If such a past image is not stored, the process proceeds to step S201.

  In step S <b> 201, the past image calling unit 54 reads a reference image corresponding to the selected shooting condition from the reference image storage unit 72. The reference image storage unit 72 stores a plurality of reference images in advance in association with the shooting conditions.

  According to the present embodiment, even when there is no past image of the subject, the reference image that serves as a reference at the time of photographing is displayed, so that appropriate photographing can be performed. In addition, the method of the present embodiment is also effective when shooting with a shooting technique that is not used by an inexperienced engineer. In a further embodiment, even if a past image exists, the past image and the reference image may be displayed at the same time, or when the past image is not appropriate, the reference image may be called according to an instruction from the operator. Good.

  The present embodiment has been described on the assumption that a plurality of reference images are stored in the reference image storage unit 72 in advance. Further, the present embodiment has been described on the assumption that the past image receiving unit 52 does not acquire a captured image when a captured image corresponding to the subject and the imaging conditions cannot be acquired from the PACS 130. However, the past image receiving unit 52 may acquire a reference image corresponding to the subject and the imaging conditions from an external device such as the PACS 130 instead of or in addition to the past image.

  For example, when the captured image corresponding to the subject and the imaging condition cannot be acquired from the PACS 130, the past image receiving unit 52 acquires the reference image corresponding to the imaging condition from the PACS 130 instead of the past image, and the reference image It can be stored in the storage unit 72. That is, the past image receiving unit 52, when there is no X-ray image corresponding to the subject and the imaging condition specified by the imaging instruction, in the PACS 130, the reference image corresponding to the imaging condition specified by the imaging instruction is displayed on the PACS 130. Can be obtained from In this case, when shooting, a reference image can be displayed instead of the past image that could not be acquired. In addition to the past image, the past image receiving unit 52 can always acquire a reference image corresponding to the shooting condition from the PACS 130 and store it in the reference image storage unit 72. In this case, when the past image is not appropriate, the reference image can be displayed instead, and the past image and the reference image can be displayed at the same time.

  In this case, the past image management unit 53 can delete the reference image in the same manner as the past image in step S110. According to such a configuration, only the reference image that is referred to at the time of shooting is stored in the memory, so that the memory can be used efficiently.

[Embodiment 3]
FIG. 9 shows an X-ray imaging apparatus according to the third embodiment. In the first and second embodiments, the X-ray imaging apparatus 100 acquires past images via the network 110. In the present embodiment, each of the plurality of X-ray imaging apparatuses 100 transfers an image captured with each other, and stores the transferred image in the captured image storage unit 70. According to such a configuration, an image transferred from another X-ray imaging apparatus 100 and stored in the captured image storage unit 70 can be used as a past image for reference during imaging.

  In the example of FIG. 9, the round wheel 150 equipped with the X-ray imaging apparatus 100 transmits the captured image to the round wheel 160 equipped with the X-ray imaging apparatus 100. The X-ray imaging apparatus 100 according to the present embodiment is the same as the X-ray imaging apparatus 100 according to the first embodiment except that the X-ray imaging apparatus 100 includes a new captured image transfer unit 81 and an image reception unit 82, and detailed description thereof will be given. Omitted. By connecting the network connection unit 80 of the roundabout car 150 and the network connection unit 80 of the roundabout car 160 with a network cable, the roundabout car 150 and the roundabout car 160 can communicate with each other.

  The new captured image transfer unit 81 of the round-trip car 150 transfers the captured image that has not been transferred to the transfer destination to the transfer destination via the network connection unit 80. In the example of FIG. 9, the newly-captured image transfer unit 81 extracts from the captured image storage unit 70 an image without a flag indicating that the transfer has already been performed with respect to the roundabout car 160, and transfers the image to the roundtrip car 160. And forward.

  The image receiving unit 82 of the round wheel 160 receives the shot image transferred from the round wheel 150 and stores it in the shot image storage unit 70.

  According to such a configuration of the present embodiment, a plurality of X-ray imaging apparatuses connected to each other, for example, the roundabout car 150 and the roundabout car 160, are taken by themselves and taken by other apparatuses. , You can have both. For this reason, it is possible to display a past image captured by another X-ray imaging apparatus at the time of imaging, and it becomes easy to perform appropriate imaging.

  With reference to FIGS. 10 to 13, the configuration of the roundabout wheel 150 or the X-ray imaging apparatus 100 will be described. 10A and 10B show a configuration of an embodiment of an X-ray imaging apparatus to which the present invention is applied. This X-ray imaging apparatus is a mobile X-ray imaging apparatus. The X-ray imaging apparatus includes an X-ray tube 1006, a tube arm 1007 that holds the X-ray tube 1006 and can be disposed at an arbitrary position, and an X-ray tube 1006 and a tube connected to the tube arm 1007. The arm 1007 has a column part that moves up and down and turns. This support | pillar part is comprised by the some support | pillar. The elevating mechanism of the support includes a slide rail 1022 serving as a guide for linear motion (linear motion) and a feed screw 1027 for linear motion feeding. Further, the elevating mechanism of the support includes an actuator 1024 that functions as an electric motor, and an actuator gear 1025 that is a connection member that transmits power from the actuator 1024.

  The mobile X-ray imaging apparatus shown in FIG. 10 is generally called a roundabout car. The mobile cart 1001 with built-in power source provided in the roundabout car is equipped with a battery and the like, and the roundabout car can be used at any place. The round wheel includes a front wheel 1012 and a drive wheel 1013 that provide movement power and support weight. Further, the round-trip car includes an X-ray and system control unit 1002 on a mobile carriage 1001 with a built-in power supply. The X-ray and system control unit 1002 is an X-ray high voltage generator, an X-ray control device, and a control panel. It has. The X-ray and system control unit 1002 also has a function of holding the tube arm 1007 when the round-wheel is moving. The mobile X-ray imaging apparatus becomes movable when the operator holds the moving handle 1011 and turns on a moving handle switch (not shown).

  Based on FIG. 11, the structural example of a support | pillar part is demonstrated. The operator releases the moving handle 1011 that was held when moving the round wheel, and then holds the collimator handle 1009 and applies a light force to pull the collimator handle 1009 upward. Then, the measurement value obtained from the load detection sensor 1033 incorporated in the slide block 1023 changes. When this information is transmitted to the X-ray and system control unit 1002, the X-ray and system control unit 1002 determines that the operator is trying to lift the collimator handle 1009 upward. Then, the X-ray and system control unit 1002 determines the actuator rotation direction 1031 and applies an operating force to at least one of the actuator 1024 of the first column 1003 and the actuator 1024 of the second column 1004. For example, the X-ray and system control unit 1002 can determine the actuator rotation direction 1031 and give an operating force to the actuators 1024 of both the first support column 1003 and the second support column 1004. The rotational driving force by the actuator 1024 is transmitted to the feed screw 1027 via the actuator gear 1025. The rotation of the feed screw 1027 moves the feed screw nut 1028 upward, and simultaneously moves the slide block 1023 connected to the feed screw nut 1028 via the connecting member 1030 upward. The slide block 1023 is configured to move up and down along the slide rail 1022 in a state where the movement resistance is reduced. By the movement of the first support column 1003 upward of the slide block 1023, the second support column 1004 connected to the slide block 1023 via the support column connecting member 1043 moves upward. Further, the X-ray tube support arm 1005 moves upward by the upward movement of the slide block 1023 of the second support column 1004.

  When stopping the movement of the X-ray tube support arm 1005, the operator releases the force applied to the collimator handle 1009. In this case, the operation load force applied to the load detection sensor 1033 incorporated in the slide block 1023 is zero, and the measurement value obtained from the load detection sensor 1033 indicates only its own weight. When this information is transmitted to the X-ray and system control unit 1002, the X-ray and system control unit 1002 determines to stop the movement. Subsequently, the X-ray and system control unit 1002 makes the actuation force zero for at least one of the actuator 1024 of the first support column 1003 and the actuator 1024 of the second support column 1004. For example, the X-ray and system control unit 1002 can make the actuation force zero for the actuators 1024 of both the first support column 1003 and the second support column 1004. The rotation stopping force of the actuator 1024 is transmitted to the feed screw 1027 via the actuator gear 1025. As the feed screw 1027 stops rotating, the feed screw nut 1028 also stops, and at the same time, the slide block 1023 connected to the feed screw nut 1028 via the connecting member 1030 also stops. That is, when the slide block 1023 of the first support column 1003 stops, the second support column 1004 connected to the slide block 1023 via the support column connecting member 1043 also stops. Further, when the slide block 1023 of the second support column 1004 stops, the X-ray tube support arm 1005 connected to the slide block 1023 also stops.

  When the X-ray tube support arm 1005 is pulled down, the operator applies a light force to pull down the collimator handle 1009. Then, the measurement value obtained from the load detection sensor 1033 incorporated in the slide block 1023 changes. When this information is transmitted to the X-ray and system control unit 1002, the X-ray and system control unit 1002 determines that the operator is going to lower the collimator handle 1009 downward. Then, the X-ray and system control unit 1002 determines the actuator rotation direction 1031 and applies an operating force to at least one of the actuator 1024 of the first column 1003 and the actuator 1024 of the second column 1004. For example, the X-ray and system control unit 1002 can determine the actuator rotation direction 1031 and give an operating force to the actuators 1024 of both the first support column 1003 and the second support column 1004. The rotational driving force by the actuator 1024 is transmitted to the feed screw 1027 via the actuator gear 1025. The rotation of the feed screw 1027 moves the feed screw nut 1028 downward, and simultaneously moves the slide block 1023 connected to the feed screw nut 1028 via the connecting member 1030 downward. When the slide block 1023 of the first support column 1003 moves downward, the second support column 1004 connected to the slide block 1023 via the support column connecting member 1043 moves downward. Further, when the slide block 1023 of the second support column 1004 moves downward, the X-ray tube support arm 1005 moves downward.

  In order to change the moving speed of the X-ray tube support arm 1005, the operator changes the force applied to the collimator handle 1009 in the vertical direction. Then, the measurement value of the load detection sensor 1033 incorporated in the slide block 1023 changes according to the applied force. This measured value is transmitted to the X-ray and system control unit 1002. The X-ray and system control unit 1002 corresponds to at least one of the actuator 1024 of the first support column 1003 and the actuator 1024 of the second support column 1004 according to the transmitted measurement value according to the actuator rotation direction 1031 and the measurement value. Actuating force is given. As described above, the moving speed of the X-ray tube support arm 1005 varies depending on the force applied to the collimator handle 1009. For example, the moving speed can be increased by applying a larger force.

  The moving speeds of the second column 1004 and the X-ray tube support arm 1005 are closed and controlled with reference to the position connected to the feed screw 1027 and the rotational position and rotational speed of the feed screw 1027 detected by the speed detector 1053. The In this way, the second support column 1004 and the X-ray tube support arm 1005 can be safely moved to the target height while maintaining an appropriate moving speed.

  A support pivot bearing 1041 is disposed at the base of the first support 1003. By rotating the shaft 1021 on the support column turning bearing 1041, the entire support column can be rotated. By turning the entire support column, the X-ray tube 1006 can be moved to the imaging position above the subject on the bed. A series of imaging preparations is completed by arranging a flat panel for imaging between the subject and the bed.

  X-ray imaging can be performed in the same manner as a general X-ray imaging apparatus. For example, the operator can set shooting conditions via the display 1010 or another input device. Thereafter, when the operator presses an irradiation switch (not shown), the X-ray tube 1006 emits X-rays, and the X-rays shaped by the collimator 9 below the X-ray tube 1006 are converted into the subject. Through the body and reach the flat panel for imaging. Then, an image is picked up by the flat panel. The captured image is transmitted to the X-ray and system control unit 1002 via wireless or wired (not shown). The transmitted image can be confirmed on the display 1010.

  FIG. 12 illustrates a common part between the first support column 1003 and the second support column 1004. As shown in FIG. 12, the basic configuration of the first support column 1003 and the basic configuration of the second support column 1004 are common. With such a configuration, advantages such as cost reduction and improvement in maintenance can be obtained.

  FIG. 13 shows a basic configuration of the first support column 1003 and the second support column 1004 in another embodiment. The basic configuration shown in FIG. 13 is similar to the basic configuration shown in FIG. 12, but instead of the position and speed detector 1053 connected to the feed screw 1027, the position arranged on the axis of the actuator 1024 and A speed detector 1054 is provided. This configuration is suitable for open control. Further, in order to maintain the positions of the second support column 1004 and the tube arm 1007, the brake disc 1052 is provided so as to contact the flat portion of the actuator gear 1025. The brake disc 1052 is controlled by the brake 1051. Using such a configuration, the positions of the second support column 1004 and the tube arm 1007 are fixed and held by deadman control. With such a configuration, it is possible to cut power consumed to perform position holding using the actuator 1024, and energy saving can be achieved.

(Other embodiments)
The present invention is also realized by executing the following processing. That is, software (program) that implements the functions of the above-described 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 program code. In this case, the program and the storage medium storing the program constitute the present invention.

50 imaging order receiving unit, 52 past image receiving unit, 54 past image calling unit, 62 operation / display unit, 71 past image storage unit, 100 X-ray imaging apparatus, 130 PACS

Claims (5)

  A round-trip vehicle comprising X-ray generation means and X-ray detection means, capable of moving and performing X-ray imaging,
  Instruction acquisition means for acquiring an imaging instruction for specifying an imaging condition for the subject and X-ray imaging;
  Image acquisition means for acquiring a previously acquired X-ray image corresponding to the specified subject and imaging conditions from an external device and storing the acquired X-ray image in a storage means before the round visit;
  Before the X-ray imaging, a control unit that reads X-ray images captured in the past corresponding to the subject to be imaged and the imaging conditions from the storage unit, and displays on the display unit;
  A round-trip car characterized by comprising: It said image acquisition means, when the instruction acquisition unit acquires a shadow instruction shooting, and obtains the X-ray image without receiving the instruction from the outside from an external device, mobile cart of claim 1 . After performing the imaging instructions into Therefore X-ray imaging, corresponding to the subject and shooting conditions specified by the imaging instruction, the X-ray images taken in the past, a management means for deleting from the storage means characterized in that it comprises further, mobile cart as claimed in claim 1 or 2.   A control method for a roundabout vehicle that includes an X-ray generation means and an X-ray detection means and is capable of moving and performing X-ray imaging,
  Obtaining an imaging instruction for specifying an imaging condition for the subject and X-ray imaging;
  Before the rounds, a process of acquiring an X-ray image captured in the past corresponding to the specified subject and imaging conditions from an external device;
  Storing the acquired X-ray image in a storage means;
  Before the X-ray imaging, a step of reading out the X-ray image captured in the past corresponding to the subject to be imaged and the imaging conditions from the storage means, and displaying on the display means;
  A method of controlling a roundabout car characterized by the above. A computer, a program for executing the steps of the control method of the mobile cart of claim 4.

Images