JP2018033839A - Medical diagnostic imaging system and x-ray detector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a medical diagnostic imaging system capable of avoiding image quality deterioration without hindering operation of an operator, and an X-ray detector.SOLUTION: The medical diagnostic imaging system according to the embodiment comprises an acquisition part, an adjustment part, and an update part. The acquisition part acquires appointed examination information indicating appointment information of an examination. The adjustment part adjusts the update time of a correction value for correcting a medical image on the basis of the appointed examination information. The update part updates the correction value at the update time adjusted by the adjustment part.SELECTED DRAWING: Figure 2

Description

  Embodiments described herein relate generally to a medical diagnostic imaging system and an X-ray detector.

  Conventionally, in a medical image diagnostic system including an X-ray diagnostic apparatus or the like, an X-ray flat panel detector (FPD) is used as an X-ray detector for detecting X-rays transmitted through a subject. . For example, the FPD includes an X-ray conversion unit that converts X-rays into electric charge, a capacitor that accumulates electric charge, a TFT (Thin Film Transistor) that reads out electric charge accumulated from the capacitor, and the read electric charge as a digital signal. An A / D converter (Analog to Digital Converter) or the like for conversion is provided, and X-rays irradiated from the X-ray tube and transmitted through the subject are detected to generate image data.

  Here, the image data generated by the FPD is subjected to correction processing for removing various noises. For example, the image data collected by the FPD is subjected to offset correction to remove various electrical noises (eg, dark current). The offset correction is performed by subtracting an offset correction value generated by executing charge reading in a state where X-rays are not irradiated from image data. Here, the offset correction value is likely to fluctuate, and changes greatly due to, for example, a temperature change. For this reason, the medical image diagnostic system periodically maintains offset correction values by executing offset calibration for updating the offset correction values in order to suppress deterioration in image quality due to fluctuations in the offset correction values. To control.

JP 2008-029393 A JP 2002-301053 A JP 2001-149355 A

  The problem to be solved by the present invention is to provide a medical image diagnostic system and an X-ray detector capable of avoiding deterioration in image quality without hindering operation by an operator.

  The medical image diagnostic system according to the embodiment includes an acquisition unit, an adjustment unit, and an update unit. The acquisition unit acquires reservation inspection information indicating inspection reservation information. The adjustment unit adjusts the update time of the correction value for correcting the medical image based on the reservation examination information. The update unit updates the correction value at the update time adjusted by the adjustment unit.

FIG. 1 is a diagram illustrating an example of a medical image diagnostic system according to the first embodiment. FIG. 2 is a block diagram showing an example of the configuration of the medical image diagnostic system according to the first embodiment. FIG. 3 is a diagram illustrating an example of the FPD according to the first embodiment. FIG. 4 is a diagram for explaining an example of a correction process for image data according to the first embodiment. FIG. 5 is a diagram for explaining an example of adjustment processing by the adjustment function according to the first embodiment. FIG. 6 is a flowchart illustrating a processing procedure performed by the medical image diagnostic system according to the first embodiment. FIG. 7 is a flowchart illustrating a processing procedure performed by the medical image diagnostic system according to the first embodiment. FIG. 8 is a flowchart illustrating a processing procedure performed by the medical image diagnostic system according to the first embodiment. FIG. 9 is a block diagram illustrating an example of a configuration of a medical image diagnostic system according to the second embodiment. FIG. 10 is a diagram for explaining an example of adjustment processing by the adjustment function according to the second embodiment. FIG. 11 is a flowchart illustrating a processing procedure performed by the medical image diagnostic system according to the second embodiment. FIG. 12 is a flowchart illustrating a processing procedure performed by the medical image diagnostic system according to the second embodiment. FIG. 13 is a diagram for explaining an example of adjustment processing by the adjustment function according to the third embodiment. FIG. 14 is a flowchart illustrating a processing procedure performed by the medical image diagnostic system according to the third embodiment. FIG. 15 is a flowchart illustrating a processing procedure performed by the medical image diagnostic system according to the third embodiment. FIG. 16 is a block diagram illustrating an example of a configuration of an FPD according to the fourth embodiment. FIG. 17 is a block diagram illustrating an example of a configuration of an FPD according to the fourth embodiment.

  Exemplary embodiments of a medical image diagnostic system and an X-ray detector according to the present application will be described below in detail with reference to the accompanying drawings. The medical image diagnostic system and the X-ray detector according to the present application are not limited to the embodiments described below. In the following embodiments, a medical image diagnostic system including an X-ray diagnostic apparatus will be described as an example.

(First embodiment)
First, an example of a medical image diagnostic system according to the first embodiment will be described with reference to FIG. FIG. 1 is a diagram illustrating an example of a medical image diagnostic system according to the first embodiment. As shown in FIG. 1, the medical diagnostic imaging system according to the first embodiment includes an X-ray high voltage device, an X-ray tube, an X-ray movable diaphragm, an X-ray tube holding device, an X-ray flat panel detector (FPD), Equipped with a standing shooting stand, a supine shooting stand, an image processing device, and the like. 1 is connected to a viewer, a PACS (Picture Archiving and Communication Systems) server, etc. (not shown) through a network. In addition, HIS (Hospital Information Systems) and RIS (Radiology Information Systems) are applied to the medical image diagnostic system, and each is connected to a management server that manages each system.

  The X-ray high voltage apparatus shown in FIG. 1 supplies a high voltage to the X-ray tube, and the X-ray tube emits X-rays using the supplied high voltage. The X-ray movable diaphragm controls the X-ray irradiation field for the purpose of reducing the exposure dose to the subject and improving the image quality of the image data. The X-ray tube holding device holds the X-ray tube and the X-ray movable diaphragm with an arm, and drives the arm to move the positions of the X-ray tube and the X-ray movable diaphragm to an imaging position, a retracted position, and the like. Here, the X-ray tube holding device is, for example, a ceiling traveling type, and the position of the X-ray tube and the X-ray movable diaphragm can be moved by traveling on a rail laid on the ceiling surface. The FPD is an X-ray detector used at each position shown in FIG. 1, and converts X-ray information transmitted through the subject into image data (projection data) and sends it to an image processing apparatus.

  Here, the FPD is, for example, a portable FPD, and is used by being incorporated in a standing position photographing stand or a standing position photographing stand as shown in FIG. For example, in the standing position imaging stand, the FPD is held by a holding portion whose one end is connected to the rail, and the FPD is slid up and down by moving the holding portion on the rail. In addition, in the supine position imaging stand, the FPD is used by being incorporated in the lower part of the top plate on which the subject is placed. Alternatively, in the supine position photographing stand, the FPD is placed on the top board and used. Note that the FPD may not be portable, but may be a case where it is incorporated into each photographing stand and fixed.

  The image processing apparatus performs overall control of the medical image diagnostic system. Specifically, the image processing apparatus collects X-ray images by controlling a standing imaging stand and a supine imaging stand. For example, the image processing apparatus controls the X-ray high voltage apparatus to expose the subject to X-rays, receives image data transmitted from the FPD, and performs various kinds of processing on the received image data. An X-ray image is generated by executing image processing. In addition, the image processing apparatus receives operations related to collection of X-ray images and image processing via a mouse, a keyboard, and the like. The image processing apparatus displays an X-ray image on a display. The image processing apparatus temporarily stores image data and X-ray images, and transfers image data and X-ray images to other apparatuses via a network.

  For example, the medical diagnostic imaging system shown in FIG. 1 irradiates a subject standing in front of a standing imaging table with X-rays from an X-ray tube, and transmits X-rays transmitted through the subject. By detecting with the FPD installed on the photographing stand, photographing in a standing position is executed. Further, for example, the medical image diagnostic system shown in FIG. 1 irradiates X-rays from an X-ray tube to a subject on a top plate provided on a supine imaging stand and transmits X-rays transmitted through the subject. By detecting with the FPD installed on the position photographing stand, photographing at the supine position is executed. Also, for example, the medical image diagnostic system shown in FIG. 1 performs imaging by detecting X-rays that have passed through the subject using an FPD placed on the top plate of the supine imaging stand.

  Next, an example of the configuration of the medical image diagnostic system 1 according to the first embodiment will be described with reference to FIG. FIG. 2 is a block diagram illustrating an example of the configuration of the medical image diagnostic system 1 according to the first embodiment. As shown in FIG. 2, the medical image diagnostic system 1 according to the first embodiment includes an X-ray high voltage device 110, an X-ray tube 120, an X-ray movable diaphragm 130, a quality filter 140, an FPD 150, and the like. A display 160, an input circuit 170, a storage circuit 180, and a processing circuit 190. Here, the X-ray tube 120, the X-ray movable diaphragm 130, the quality filter 140, and the FPD 150 are included in, for example, the standing imaging stand and the standing imaging stand shown in FIG. The display 160, the input circuit 170, the storage circuit 180, and the processing circuit 190 are included in, for example, the image processing apparatus illustrated in FIG.

  The X-ray high voltage device 110 supplies a high voltage to the X-ray tube 120 under the control of the processing circuit 190. The X-ray tube 120 exposes X-rays using the high voltage supplied from the X-ray high voltage apparatus 110. The X-ray movable diaphragm 130 controls an X-ray irradiation area irradiated from the X-ray tube 120. Here, the X-ray tube 120 and the X-ray movable diaphragm 130 are supported by a support unit such as an arm, for example, and are driven by a driving device (not shown). The drive device moves the positions of the X-ray tube 120 and the X-ray movable diaphragm 130 under the control of the processing circuit 190. The driving device controls the irradiation range of the X-rays emitted from the X-ray tube 120 by adjusting the aperture of the diaphragm blades of the X-ray movable diaphragm 130 under the control of the processing circuit 190. The X-ray filter 140 is arranged on an X-ray path (for example, an X-ray movable diaphragm) so that X-rays having a predetermined X-ray quality and dose are incident on the FPD 150 under predetermined SID (Source Image Distance) and X-ray conditions. 130 is a filter installed in front of 130. For example, the wire quality filter 140 is a metal plate having a predetermined material and thickness.

  Here, the FPD 150 will be described with reference to FIG. FIG. 3 is a diagram illustrating an example of the FPD 150 according to the first embodiment. As illustrated in FIG. 3, the FPD 150 according to the first embodiment includes an X-ray conversion unit, a capacitor, a TFT (Thin Film Transistor), and the like. The X-ray conversion unit converts X-ray energy into electric charges. Here, the X-ray conversion unit may be either a direct conversion type that converts X-rays directly into electric charges or an indirect conversion type that converts X-rays into light and converts the converted light into electric charges. In the case of the direct conversion type, the X-ray conversion unit is made of, for example, an amorphous selenium semiconductor (a-Se) or the like, and converts X-rays that have passed through the subject and entered into charges. In the case of the indirect conversion type, the X-ray conversion unit is composed of, for example, a scintillator and a photodiode, and the scintillator converts the incident X-rays that have passed through the subject into light, and the photodiode converts the light into charges. .

  The capacitor stores the electric charge converted by the X-ray conversion unit. The TFT is a semiconductor switch that extracts charges from each capacitor, and is connected to a gate line that inputs a drive signal from a drive circuit (not shown) and a signal line that flows charges extracted from the capacitor. A capacitor and a TFT shown in FIG. 3 are provided for each pixel. The FPD amplifies charges taken out from capacitors corresponding to each pixel by an amplifier, and converts the amplified charges into a digital signal by an A / D converter (Analog to Digital Converter), thereby generating image data.

  Returning to FIG. 2, the display 160 is a monitor referred to by the operator, and displays an X-ray image or the like generated by the processing circuit 190 under the control of the processing circuit 190. The input circuit 170 includes a mouse, a keyboard, a trackball, a switch, a button, a joystick, and the like used for inputting various instructions and various settings, and receives instructions and settings from an operator. The storage circuit 180 stores data used when the processing circuit 190 controls the entire processing performed by the medical image diagnostic system 1, image data, an X-ray image, and the like. For example, the storage circuit 180 stores each program executed by the processing circuit 190. In addition, the storage circuit 180 stores data used for X-ray image correction. Data used for correcting the X-ray image will be described later.

  The processing circuit 190 controls each component included in the medical image diagnostic system 1 in accordance with an input operation received from the operator via the input circuit 170. For example, the processing circuit 190 is realized by a processor. The processing circuit 190 reads out and executes the corresponding program from the storage circuit 180, thereby executing the control function 191, the acquisition function 192, the adjustment function 193, and the update function 194. Here, the acquisition function 192 is an example of an acquisition unit in the claims. The adjustment function 193 is an example of an adjustment unit in the claims. The update function 194 is an example of an update unit in the claims. Details of these functions will be described later.

  Based on such a configuration, the medical image diagnostic system 1 according to the present embodiment can avoid a deterioration in image quality without hindering an operation by an operator. Specifically, the medical image diagnostic system 1 according to the first embodiment adjusts the update time of the correction value for correcting the image data generated by the FPD 150 according to the examination reservation, so that the operator can Avoid image quality degradation without hindering operation. As described above, the image data generated by the FPD 150 is subjected to correction processing for removing various noises. The medical image diagnostic system 1 adjusts the update time of the correction value used in this correction process according to the examination reservation.

  Hereinafter, an example of a correction process for the image data generated by the FPD 150 will be described with reference to FIG. FIG. 4 is a diagram for explaining an example of a correction process for image data according to the first embodiment. The image data generated by the FPD 150 includes, for example, an offset component generated by a dark current from the X-ray conversion unit and TFT, a spatial non-uniformity in the X-ray conversion unit, a manufacturing variation of each amplifier, and the like. It has defect points due to non-uniformity, defects of the X-ray conversion part and TFT, and the like. Therefore, in the FPD 150 in the medical image diagnostic system 1, in order to correct these, for example, as shown in FIG. 4, offset correction, gain correction, defect point correction, and the like are executed.

  For example, as shown in FIG. 4, the FPD 150 removes an offset component by subtracting a predetermined offset correction value from the generated image data. Then, as shown in FIG. 4, the FPD 150 corrects the gain non-uniformity by multiplying the image data by a predetermined gain correction coefficient. Thereafter, as shown in FIG. 4, the FPD 150 interpolates the defect points using the pixel values of the normal pixels around the defect points along a predetermined defect point map. As described above, the image data generated by the FPD 150 is subjected to correction processing using correction values such as an offset correction value, a gain correction coefficient, and a defect point map. These correction values are controlled so that accurate correction is always performed by periodically calibrating.

  Here, as described above, the offset correction is likely to fluctuate, and changes greatly due to, for example, a temperature change. Therefore, the medical image diagnostic system 1 periodically executes offset calibration for updating the offset correction value at a high frequency (for example, at intervals of 10 minutes) in order to suppress image quality deterioration due to fluctuations in the offset correction value. Thus, control is performed to maintain a more accurate offset correction value. However, if offset calibration is executed, shooting cannot be performed. Therefore, if the above-described offset calibration is executed during inspection, it becomes a factor that hinders the operation of the operator or shooting. Therefore, in the medical image diagnostic system 1, when it is time to perform offset calibration during inspection, control is performed so that offset calibration is not performed, or when inspection is started during offset calibration. , Offset calibration can be canceled.

  However, in this case, the offset calibration is not performed, and the offset correction value may not be updated, so that the image quality may be deteriorated. Therefore, the medical image diagnostic system 1 adjusts the timing of performing the offset calibration based on the examination reservation information by the processing by the processing circuit 190 described in detail below, so that the operation by the operator is not hindered. This makes it possible to avoid degradation of image quality.

  Details of the processing circuit 190 will be described below. A control function 191 in the processing circuit 190 executes overall control of the medical image diagnostic system 1. For example, the control function 191 acquires the order information of the examination, and collects image data by controlling the standing position imaging stand, the standing position imaging stand, the FPD 150, and the like based on the acquired order information. The control function 191 stores the image data output from the FPD 150 in the storage circuit 180. Further, the control function 191 generates various X-ray images from the image data, and stores the generated X-ray images in the storage circuit 180 or displays them on the display 160. In addition, the control function 191 executes various processes in accordance with an input operation received from the operator via the input circuit 170. In addition, the control function 191 performs offset correction, gain correction, and defect point correction on the image data using the offset correction value, the gain correction coefficient, and the defect point map stored by the storage circuit 180. In addition, the control function 191 acquires a gain correction coefficient and a defect point map and stores them in the storage circuit 180.

  The acquisition function 192 acquires reservation examination information indicating examination reservation information. For example, the acquisition function 192 accesses a management server that manages HIS and RIS via the network, and acquires reservation examination information in the medical image diagnostic system 1. For example, the acquisition function 192 acquires information such as the reserved examination date and time and examination contents from each management server and stores the information in the storage circuit 180. The acquisition function 192 can acquire information related to the examination by the medical image diagnostic system 1 in addition to the scheduled examination information. For example, the acquisition function 192 acquires information indicating that an event such as a visit registration of a patient (subject), an on-site announcement, acquisition of a test order, patient (subject) search, and reading of a medical record has occurred.

  The adjustment function 193 adjusts the update time of the correction value for correcting the medical image based on the reservation examination information. For example, the adjustment function 193 specifies the inspection execution time based on the reserved inspection information, and periodically updates the offset correction value when the update time of the periodic update of the offset correction value overlaps with the inspection execution time. Adjust the renewal time of regular updates so that is performed before the inspection is performed. FIG. 5 is a diagram for explaining an example of adjustment processing by the adjustment function 193 according to the first embodiment. In FIG. 5, an example of the period for performing the regular offset calibration before adjustment is shown in the upper part, and an example of the period for performing the offset calibration after the adjustment is shown in the lower part.

  For example, as shown in the upper part of FIG. 5, the offset calibration is performed periodically (for example, every 10 minutes) using a predetermined time (for example, 10 seconds). Here, as shown in the upper part of FIG. 5, when the inspection start time is reached during the regular offset calibration (when the offset calibration execution time overlaps with the inspection execution time), a predetermined An examination cannot be performed for a time (for example, 10 seconds), and an engineer and a patient (subject) are made to wait.

  Therefore, the adjustment function 193 adjusts the timing for performing the offset calibration based on the inspection time from the reserved inspection information acquired by the acquisition function 192 so that the time for performing the offset calibration does not overlap the time for performing the inspection. To do. For example, as shown in the lower part of FIG. 5, the adjustment function 193 adjusts the offset calibration timing so that the periodic offset calibration that overlaps the inspection execution time of the reserved inspection is completed by the start of the inspection. To do. In this way, by adjusting the timing so that the adjustment function 193 performs offset calibration immediately before the scheduled inspection time, the FPD 150 can be used immediately at the start of the inspection, which hinders the operation by the operator. Can be avoided. In addition, by performing offset calibration immediately before the scheduled inspection time, it is possible to perform offset correction using a more accurate offset correction value for the image data captured in the scheduled inspection, which reduces image quality. It can be avoided.

  The update function 194 updates the correction value at the update time adjusted by the adjustment function 193. Specifically, the update function 194 updates the offset correction value at a preset periodic offset calibration execution timing and updates the offset correction value at the offset calibration execution timing adjusted by the adjustment function 193. Update. For example, the update function 194 performs charge readout for each pixel in the FPD 150 in a state in which X-ray irradiation is not performed a plurality of times, and generates an offset correction value obtained by averaging the readout results obtained for the plurality of times for each pixel. Then, the update function 194 updates the offset correction value stored in the storage circuit 180 to the generated offset correction value. The update function 194 performs the above-described update process at a preset timing for performing the regular offset calibration and the timing for performing the offset calibration adjusted by the adjustment function 193.

  As described above, the medical image diagnostic system 1 adjusts the timing of periodic offset calibration based on the scheduled examination information. Here, the medical image diagnostic system 1 can adjust the execution timing of the regular offset calibration based on various information other than the scheduled examination information.

  For example, the adjustment function 193 adjusts the update timing of the offset correction value periodically so that the offset correction value is periodically updated at the occurrence time of a predetermined event related to the inspection. For example, the adjustment function 193 performs offset calibration at the time when events such as patient registration (patient) visit registration, on-site announcement, examination order acquisition, patient (subject) search, and chart reading occur. Is performed so that the offset calibration execution timing is adjusted. In this case, the adjustment function 193 controls the update function 194 so as to execute offset calibration at the timing when the information indicating that each event has occurred is acquired by the acquisition function 192.

  Further, for example, the adjustment function 193 can adjust the execution timing of the regular offset calibration by combining the reservation inspection information and a predetermined event. For example, the adjustment function 193 estimates the time from the occurrence time of a predetermined event to the execution time of the inspection, and the estimated time is shorter than the time until the next update time of the periodic update of the offset correction value. In the case where the offset correction value is short, the update timing of the offset correction value is periodically adjusted so that the offset correction value is periodically updated when the predetermined event occurs.

  That is, the adjustment function 193 estimates the time from when the information indicating that each event has occurred is acquired by the acquisition function 192 to the execution time of the examination. For example, the adjustment function 193 estimates the time from the time when the patient visit registration is executed to the time when the examination is performed. Then, the adjustment function 193 adjusts the execution timing so that the offset calibration is performed at this time when the estimated time is shorter than the time until the next periodic offset calibration execution timing. For example, the adjustment function 193 may register the patient's visit if the time from the time when the patient's visit registration is executed to the time when the examination is performed is shorter than the time until the next periodic offset calibration is performed. The update function 194 is controlled so that offset calibration is performed at the time of.

  Similarly, the adjustment function 193 searches for a patient (subject) when an in-house announcement flows in the hospital (or when a guidance display is displayed), or when an examination order is acquired in the medical image diagnostic system 1. Estimate the time from the time when each event occurred to the execution time of the examination (start time) when it is executed, or when the medical chart is read out, and the estimated time is the next regular offset If it is shorter than the time until the calibration execution timing, the execution timing is adjusted so that offset calibration is executed at that time. Note that each event described above is merely an example, and the embodiment is not limited to this, and any other event may be used.

  Next, a processing procedure by the medical image diagnostic system 1 according to the first embodiment will be described with reference to FIGS. 6 to 8 are flowcharts showing processing procedures by the medical image diagnostic system 1 according to the first embodiment. Here, FIG. 6 shows the adjustment processing of the execution timing of the offset calibration according to the reservation inspection information. In steps S101 and S102 in FIG. 6, for example, the processing circuit 190 stores a program corresponding to the acquisition function 192. This is realized by calling from 180 and executing. Steps S103 and S104 are realized, for example, when the processing circuit 190 calls and executes a program corresponding to the adjustment function 193 from the storage circuit 180. Further, step S105 is realized, for example, when the processing circuit 190 calls and executes a program corresponding to the update function 194 from the storage circuit 180.

  FIG. 7 shows reservation adjustment information and adjustment processing of the offset calibration execution timing according to a predetermined event. In steps S201 and S202 in FIG. 7, for example, the processing circuit 190 stores a program corresponding to the acquisition function 192. This is realized by calling from the circuit 180 and executing it. In addition, steps S203, S204, S206, and S207 are realized, for example, when the processing circuit 190 calls and executes a program corresponding to the adjustment function 193 from the storage circuit 180. Steps S205 and S208 are realized, for example, when the processing circuit 190 calls and executes a program corresponding to the update function 194 from the storage circuit 180.

  FIG. 8 shows the adjustment processing of the timing for performing the offset calibration according to the combination of the scheduled inspection information and the predetermined event. For example, the processing circuit 190 corresponds to the acquisition function 192 in steps S301 and S302 in FIG. This is realized by calling a program from the storage circuit 180 and executing it. Steps S303, S304, and S306 to S309 are realized, for example, when the processing circuit 190 calls and executes a program corresponding to the adjustment function 193 from the storage circuit 180. Steps S305 and S310 are realized, for example, by the processing circuit 190 calling and executing a program corresponding to the update function 194 from the storage circuit 180.

  For example, when adjusting the execution timing of the offset calibration according to the scheduled examination information, as illustrated in FIG. 6, in the medical image diagnostic system 1 according to the present embodiment, first, the processing circuit 190 acquires the scheduled examination information. (Step S101), the inspection execution time is specified (Step S102). Then, the processing circuit 190 determines whether or not the next periodic offset calibration execution time overlaps with the inspection execution time (step S103).

  Here, when the execution time of the next regular offset calibration overlaps with the execution time of the inspection (Yes in step S103), the processing circuit 190 sets the execution time of the offset calibration that overlaps with the execution time of the inspection. Adjust before time (step S104). Then, the processing circuit 190 performs offset calibration with the adjusted execution time (step S105). On the other hand, when the execution time of the next periodic offset calibration does not overlap with the execution time of the inspection (No in step S103), the processing circuit 190 performs the offset calibration at a preset periodic time ( Step S105).

  Further, when adjusting the execution timing of the offset calibration according to the scheduled examination information and a predetermined event, for example, as shown in FIG. 7, in the medical image diagnostic system 1 according to the present embodiment, first, the processing circuit 190 The reserved inspection information is acquired (step S201), and the inspection execution time is specified (step S202). Then, the processing circuit 190 determines whether or not the next periodic offset calibration execution time overlaps with the inspection execution time (step S203).

  Here, when the execution time of the next periodic offset calibration overlaps with the execution time of the inspection (Yes in step S203), the processing circuit 190 sets the execution time of the offset calibration that overlaps the execution time of the inspection to the execution of the inspection. Adjust before time (step S204). Then, the processing circuit 190 performs offset calibration with the adjusted execution time (step S205). On the other hand, when the execution time of the next periodic offset calibration does not overlap with the execution time of the inspection (No at Step S203), the processing circuit 190 determines whether or not the inspection is started (Step S206).

  Here, when the inspection is started (Yes at Step S206), the processing circuit 190 ends the process. On the other hand, when the inspection has not started (No at Step S206), the processing circuit 190 determines whether or not a predetermined event has occurred (Step S207). For example, the processing circuit 190 determines whether or not events such as patient registration (patient) visit registration, on-site announcement, examination order acquisition, patient (subject) search, and chart reading have occurred.

  Here, when a predetermined event occurs (Yes at Step S207), the processing circuit 190 performs offset calibration at a timing when the predetermined event occurs (Step S208). On the other hand, when the predetermined event has not occurred (No at Step S207), the processing circuit 190 returns to Step S203 and determines whether or not the next periodic offset calibration execution time overlaps with the inspection execution time. judge.

  Further, when adjusting the execution timing of the offset calibration according to the combination of the scheduled examination information and the predetermined event, for example, as shown in FIG. 8, in the medical image diagnostic system 1 according to the present embodiment, first, processing The circuit 190 acquires the reserved inspection information (step S301), and specifies the inspection execution time (step S302). Then, the processing circuit 190 determines whether or not the next periodic offset calibration execution time overlaps with the inspection execution time (step S303).

  Here, when the execution time of the next periodic offset calibration overlaps with the execution time of the inspection (Yes in step S303), the processing circuit 190 sets the execution time of the offset calibration overlapping with the execution time of the inspection. Adjust before the time (step S304). Then, the processing circuit 190 performs offset calibration with the adjusted execution time (step S305). On the other hand, when the execution time of the next periodic offset calibration does not overlap with the execution time of the inspection (No at Step S303), the processing circuit 190 determines whether or not the inspection is started (Step S306).

  Here, when the inspection is started (Yes in step S306), the processing circuit 190 ends the process. On the other hand, when the inspection has not started (No at Step S306), the processing circuit 190 determines whether or not a predetermined event has occurred (Step S307). Here, when a predetermined event occurs (Yes at Step S307), the processing circuit 190 estimates the time until the start of the inspection (Step S308), and the estimated time is shorter than the time until the next offset calibration. It is determined whether or not (step S309).

  If the estimated time is shorter than the time until the next offset calibration (Yes at step S309), the processing circuit 190 performs offset calibration at the timing when a predetermined event occurs (step S310). On the other hand, when the estimated time is longer than the time until the next offset calibration (No at Step S309), the processing circuit 190 returns to Step S303 and the time for performing the next periodic offset calibration is It is determined whether or not the execution time overlaps. If the predetermined event does not occur in the determination in step S307 (No in step S307), the processing circuit 190 returns to step S303, and the next periodic offset calibration execution time is the inspection execution time. Whether or not to overlap.

  As described above, according to the first embodiment, the acquisition function 192 acquires reservation examination information indicating examination reservation information. The adjustment function 193 adjusts the offset calibration execution time of the offset correction value for correcting the medical image based on the reservation examination information. The update function 194 updates the offset correction value at the offset calibration execution time adjusted by the adjustment function 193. Therefore, the medical image diagnostic system 1 according to the first embodiment can perform the offset calibration at a time other than the reserved time while avoiding the offset calibration being performed during the scheduled examination. This makes it possible to avoid the deterioration of the image quality without hindering the operation by the operator.

  In addition, according to the first embodiment, the adjustment function 193 specifies the inspection execution time based on the reserved inspection information, and the periodic offset calibration execution time of the offset correction value overlaps with the inspection execution time. In such a case, the time for performing the regular offset calibration is adjusted so that the regular offset calibration of the offset correction value is performed before the test is performed. Therefore, the medical image diagnostic system 1 according to the first embodiment can perform offset calibration immediately before the examination is performed, and can perform offset correction using a more accurate offset correction value. To.

  Further, according to the first embodiment, the adjustment function 193 periodically sets the offset correction value so that the regular offset calibration of the offset correction value is executed at the occurrence time of a predetermined event related to the inspection. Adjust the timing of offset calibration. Therefore, the medical image diagnostic system 1 according to the first embodiment can be adjusted so that the offset calibration is performed at an arbitrary time, and the adjustment timing of the offset calibration can be adjusted to an arbitrary timing. to enable.

  Further, according to the first embodiment, the adjustment function 193 estimates the time from the occurrence time of the predetermined event to the inspection execution time, and the estimated time is next to the regular offset calibration of the offset correction value. If the offset correction value is periodically shorter than the time until the time when the offset correction is performed, the offset correction value is periodically adjust. Therefore, the medical image diagnostic system 1 according to the first embodiment makes it possible to adjust the execution timing in consideration of the time until the examination and an arbitrary timing.

(Second Embodiment)
Next, a second embodiment will be described. In the second embodiment, a case will be described in which the collection timing of image data is predicted during an inspection, and the execution timing of offset calibration is adjusted according to the prediction result. FIG. 9 is a block diagram showing an example of the configuration of the medical image diagnostic system 1a according to the second embodiment. Compared with the medical image diagnostic system 1 according to the first embodiment, the medical image diagnostic system 1a according to the second embodiment differs in the processing content by the processing circuit 190a. Hereinafter, this point will be mainly described.

  The processing circuit 190a in the medical image diagnostic system 1a according to the second embodiment controls each component included in the medical image diagnostic system 1a according to an input operation received from the operator via the input circuit 170. For example, the processing circuit 190a is realized by a processor. The processing circuit 190a executes the control function 191a, the prediction function 195a, the adjustment function 193a, and the update function 194a by reading and executing the corresponding program from the storage circuit 180. Here, the processing circuit 190a predicts the collection timing of the image data during the inspection, and adjusts the execution timing of the regular offset calibration based on the prediction result. The control function 191a executes overall control of the medical image diagnostic system 1a in the same manner as the control function 191. That is, the control function 191 collects image data based on the examination order, and generates an X-ray image from the collected image data.

  The prediction function 195a predicts the collection time of the medical image during the examination. Specifically, the prediction function 195a specifies the collection contents of image data in the current examination being executed under the control of the control function 191a based on the examination order. For example, the prediction function 195a predicts the remaining number of times image data is collected in the examination based on the image data collection time. That is, the prediction function 195a obtains the total number of image data collection times in the current examination from the examination order, and obtains the number of image data collection times executed by the control function 191a. Then, the prediction function 195 predicts the remaining number of image data collections from the total number of image data collections and the currently executed number of collections.

  The adjustment function 193a performs periodic offset calibration of the offset correction value so that the periodic update of the offset correction value is executed after the end of the inspection when the remaining number of times of image data collection falls below a predetermined number. Adjust the implementation period. FIG. 10 is a diagram for explaining an example of adjustment processing by the adjustment function 193a according to the second embodiment. In FIG. 10, an example of the period for performing the regular offset calibration before adjustment is shown in the upper part, and an example of the period for performing the offset calibration after the adjustment is shown in the lower part.

  For example, as shown in the upper part of FIG. 10, the periodic offset calibration is periodically performed even during the inspection. Here, as shown in the upper part of FIG. 10, when the imaging timing comes during the regular offset calibration, the imaging cannot be performed for a predetermined time (for example, 10 seconds), and the technician or patient (Subject) will be kept waiting.

  Therefore, the adjustment function 193a determines whether or not to perform the offset calibration immediately based on the remaining number of photographing predicted by the prediction function 195a, and executes the offset calibration adjustment process according to the determination result. To do. For example, as shown in the upper part of FIG. 10, when the scheduled number of shots scheduled in the inspection order is 3, and the remaining number of shots predicted by the prediction function 195a is “1” (the remaining shots are currently As shown in the lower part of FIG. 10, the adjustment function 193a performs periodic offset calibration after the shooting 3 (after the third exposure). Adjust implementation timing to be implemented. As described above, the adjustment function 193a adjusts the offset calibration so that it is performed after shooting when the remaining number of shootings is equal to or less than the predetermined number of times. It is possible to avoid trouble.

  Similar to the update function 194, the update function 194a updates the correction value at the update time adjusted by the adjustment function 193a. Specifically, the update function 194a updates the offset correction value at a preset timing for performing the regular offset calibration, and also updates the offset correction value at the timing for performing the offset calibration adjusted by the adjustment function 193a. Update.

  Here, the adjustment function 193a performs control so that the periodic offset calibration is immediately performed when the prediction result of the remaining number of photographings by the prediction function 195a exceeds a predetermined number. That is, the adjustment function 193a performs the regular offset calibration at a preset execution timing even when the remaining number of photographing exceeds a predetermined number, even during the inspection. Control the update function. Thereby, it is possible to avoid the deterioration of the image quality.

  As described above, the medical image diagnostic system 1a adjusts the timing of the regular offset calibration according to the number of remaining imaging during examination. Here, the medical image diagnostic system 1a can adjust the execution timing so that offset calibration is performed every predetermined number of times of imaging. For example, offset calibration may be performed without waiting for the end of the examination when the preset number of scheduled imaging is completed, such as in a group examination, when subjects are switched one after another for imaging. . In this case, for example, the adjustment function 193a periodically offsets the offset correction value so that the offset correction value is periodically calibrated every time the number of times the image data is collected reaches a predetermined number. Adjust the timing of calibration.

  Note that the medical image diagnostic system 1a can appropriately execute the offset calibration adjustment process based on the reservation examination information described in the first embodiment. In other words, the medical image diagnostic system 1a can execute the offset calibration adjustment process based on the scheduled examination information before the start of the examination, and can execute the offset calibration adjustment process based on the number of imaging described above after the examination starts. It is. In this case, the processing circuit 190a performs the same function as the processing circuit 190. In addition, the predetermined number of times used in the determination process related to the number of remaining photographings described above can be arbitrarily set. Further, the predetermined number of times when the above-described offset calibration is performed can be arbitrarily set.

  Next, a processing procedure by the medical image diagnostic system 1a according to the second embodiment will be described with reference to FIGS. FIGS. 11-12 is a flowchart which shows the process sequence by the medical image diagnostic system 1a which concerns on 2nd Embodiment. Here, FIG. 11 shows the adjustment processing of the timing for performing the offset calibration according to the number of remaining photographing during the inspection. In step S401 in FIG. 11, for example, the processing circuit 190a stores a program corresponding to the control function 191a. This is realized by calling from the circuit 180 and executing it. Steps S402, S403, and S408 are realized by, for example, the processing circuit 190a calling and executing a program corresponding to the prediction function 195a from the storage circuit 180. Further, step S404 is realized, for example, when the processing circuit 190a calls and executes a program corresponding to the adjustment function 193a from the storage circuit 180. Further, steps S405 to S407 are realized, for example, when the processing circuit 190a calls and executes a program corresponding to the update function 194a from the storage circuit 180.

  FIG. 12 shows the adjustment processing of the offset calibration execution timing executed every predetermined number of times of photographing. In step S501 in FIG. 12, for example, the processing circuit 190a calls the program corresponding to the control function 191a from the storage circuit 180. It is realized by executing. Further, step S502 is realized, for example, when the processing circuit 190a calls and executes a program corresponding to the prediction function 195a from the storage circuit 180. Steps S503 and S504 are realized, for example, by the processing circuit 190a calling and executing a program corresponding to the update function 194a from the storage circuit 180.

  When adjusting the execution timing of the offset calibration according to the remaining number of imaging during the examination, for example, as shown in FIG. 11, in the medical image diagnostic system 1a according to the present embodiment, first, the processing circuit 190a performs the examination. It is started (step S401), and it is determined whether or not it is time for performing regular offset calibration (step S402). Here, when it is not the time for performing the regular offset calibration (No in step S402), the processing circuit 190a is in a standby state until the time for the execution is reached.

  On the other hand, when it is the time for performing the regular offset calibration (Yes at Step S402), the processing circuit 190a determines whether or not the remaining number of times of photographing is equal to or less than a predetermined number (Step S403). Here, when the remaining number of times of photographing is equal to or less than the predetermined number of times (Yes at Step S403), the processing circuit 190a adjusts the time for performing the offset calibration after the inspection is finished (Step 404), and whether or not the inspection is finished. Is determined (step S405). When the inspection is completed (Yes at Step S405), the processing circuit 190a performs offset calibration (Step S406). Note that the processing circuit 190a is in a standby state until the inspection is completed (No in step S405).

  On the other hand, if it is determined in step S403 that the remaining number of shootings is not less than the predetermined number (No in step S403), the processing circuit 190a performs offset calibration (step S407) and precedes the next execution time. It is determined whether or not the inspection is finished (step S408). Here, when the inspection ends before the next execution time (Yes in step S408), the processing circuit 190a ends the processing. On the other hand, when the inspection does not end before the next execution time (No at Step S408), the processing circuit 190a returns to Step S402 and determines whether it is the execution time of the regular offset calibration.

  Further, when adjusting the execution timing of the offset calibration performed every predetermined number of times of imaging, for example, as shown in FIG. 12, in the medical image diagnostic system 1a according to the present embodiment, first, the processing circuit 190a Is started (step S501), and it is determined whether or not the number of photographing has reached a predetermined number (step S502). Here, when the number of photographing reaches the predetermined number (Yes at Step S502), the processing circuit 190a performs offset calibration (Step S503) and determines whether or not the inspection is finished (Step S504). . Here, when the inspection is completed (Yes at Step S504), the processing circuit 190a ends the processing. Note that the processing circuit 190a is in a standby state until the number of photographing reaches a predetermined number (No in step S502). The processing circuit 190a is in a standby state until the inspection is completed (No at Step S504).

  As described above, according to the second embodiment, the prediction function 195a predicts the collection time of image data during the inspection. The adjustment function 193a adjusts the offset calibration execution time of the offset correction value for correcting the image data based on the prediction result of the image data collection timing. The update function 194a updates the offset correction value at the time of the offset calibration adjusted by the adjustment function 193a. Therefore, the medical image diagnostic system 1a according to the second embodiment makes it possible to avoid the deterioration of the image quality without hindering the operation by the operator even during the examination.

  Further, according to the second embodiment, the prediction function 195a predicts the remaining number of times image data is collected in the examination based on the collection time of the image data. The adjustment function 193a periodically offsets the offset correction value so that the periodic offset calibration of the offset correction value is executed after the inspection is completed when the remaining number of times of image data collection falls below a predetermined number. Adjust the timing of calibration. Therefore, the medical image diagnostic system 1a according to the second embodiment makes it possible to perform offset calibration at an optimum timing according to the remaining number of times of imaging even during the examination.

  Further, according to the second embodiment, the adjustment function 193a sets the offset correction value so that the offset correction value is periodically calibrated every time the number of times the image data is collected reaches a predetermined number. Adjust the timing of periodic offset calibration. Therefore, the medical image diagnostic system 1a according to the second embodiment can avoid deterioration in image quality even when a long-term examination is performed.

(Third embodiment)
Next, a third embodiment will be described. In the third embodiment, a case will be described in which the offset calibration execution timing in each FPD 150 is adjusted when an inspection is performed using a plurality of FPDs 150. The medical image diagnostic system 1a according to the third embodiment is compared with the medical image diagnostic system 1a according to the second embodiment, the processing content by the control function 191a, the processing content by the prediction function 195a, and the adjustment. The processing contents by the function 193a are different. Hereinafter, these points will be mainly described.

  The control function 191a according to the third embodiment controls the collection of image data using the plurality of FPDs 150 based on the inspection order. For example, the control function 191a controls the collection of image data by the two FPDs 150 respectively installed on the standing position imaging table and the standing position imaging table, and generates an X-ray image from each image data.

  The prediction function 195a according to the third embodiment predicts the collection time of image data for each FPD 150 during the inspection during the inspection. Specifically, the prediction function 195a specifies the collection timing of image data by each FPD 150 based on the inspection order.

  The adjustment function 193a according to the third embodiment adjusts the time for performing the regular offset calibration of the offset correction value for each FPD 150 based on the time for collecting the image data in each FPD 150. FIG. 13 is a diagram for explaining an example of adjustment processing by the adjustment function 193a according to the third embodiment. For example, in the medical image diagnostic system 1, image data may be collected using two FPDs, FPD1 and FPD2, as shown in FIG. 13, depending on the image data collection method (technique). . In this case, for example, as shown in FIG. 13, the prediction function 195a predicts two imaging timings by the FPD1 and one imaging timing by the FPD2 based on the inspection order.

  The adjustment function 193a compares the execution timing of the periodic offset calibration of the FPD1 and the FPD2 with the imaging timing predicted by the prediction function 195a, and corresponds to the case where the execution timing of the offset calibration overlaps the imaging timing. The execution timing of periodic offset calibration in the FPD to be adjusted is adjusted. For example, as shown in FIG. 13, the adjustment function 193a overlaps the shooting timing (second shooting) in the FPD 1 with the execution timing of the periodic offset calibration (the second time during the execution of the periodic offset calibration). Therefore, the execution timing is adjusted so that the offset calibration is performed after the timing when the technique is switched (the timing when the imaging with the FPD 1 is completed).

  On the other hand, as shown in FIG. 13, the execution timing of the regular offset calibration in the FPD 2 does not overlap with the imaging timing of the FPD 2, so the adjustment function 193 a The update function 194a is controlled to perform offset calibration. Here, offset calibration during inspection in the FPD1 and the FPD2 is performed in the background. As described above, the adjustment function 193a adjusts the offset calibration execution timing so that the offset calibration is performed at a timing when each FPD 150 is not used when a plurality of FPDs 150 are used. Thereby, offset calibration can be performed efficiently.

  As described above, when a plurality of FPDs 150 are used, the medical image diagnostic system 1a adjusts the timing for performing periodic offset calibration according to the imaging timing of each FPD 150. Here, even when the medical image diagnosis system 1a uses a single FPD 150, the execution timing can be adjusted so that offset calibration is performed when a predetermined condition is satisfied. For example, when a plurality of parts are imaging target parts and the target parts are different parts that are not adjacent to each other, when the position of the FPD 150 is changed, when the position of the bed is changed, X-ray When the tube is moved, control may be performed so that offset calibration is performed when the door of the examination room where the X-ray diagnostic apparatus is disposed is open.

  That is, each case described above is a timing at which X-ray exposure is not considered to be performed. In each case described above where X-rays are considered not to be exposed, offset calibration is efficiently performed. The correction value can be updated. In this case, for example, the adjustment function 193a performs the periodic offset calibration execution time of the offset correction value so that the periodic offset calibration of the offset correction value is performed at the occurrence time of the predetermined event under inspection. Adjust.

  The medical image diagnostic system 1a according to the third embodiment is based on the offset calibration adjustment process based on the reservation examination information described in the first embodiment and the number of imaging described in the second embodiment. It is also possible to execute offset calibration adjustment processing as appropriate. That is, the medical image diagnostic system 1a according to the third embodiment performs offset calibration adjustment processing based on scheduled examination information before starting the examination for offset calibration in the plurality of FPDs 150, and performs imaging after the examination starts. It is also possible to execute offset calibration adjustment processing based on the number of times for each FPD 150. In this case, the processing circuit 190a performs the same function as the processing circuit 190 according to the first embodiment and the processing circuit 190a according to the second embodiment.

  Next, a processing procedure performed by the medical image diagnostic system 1a according to the third embodiment will be described with reference to FIGS. FIGS. 14 to 15 are flowcharts showing a processing procedure by the medical image diagnostic system 1a according to the third embodiment. Here, FIG. 14 shows the adjustment processing of the offset calibration execution timing in the plurality of FPDs 150. In step S601 in FIG. 14, for example, the processing circuit 190a calls a program corresponding to the control function 191a from the storage circuit 180. It is realized by executing. Further, step S602 is realized, for example, when the processing circuit 190a calls and executes a program corresponding to the prediction function 195a from the storage circuit 180. Further, step S603 is realized, for example, by the processing circuit 190a calling and executing a program corresponding to the adjustment function 193a from the storage circuit 180. Further, step S604 is realized, for example, when the processing circuit 190a calls and executes a program corresponding to the update function 194a from the storage circuit 180.

  FIG. 15 shows the adjustment process of the offset calibration execution timing executed for each predetermined condition. In step S701 in FIG. 15, for example, the processing circuit 190a calls a program corresponding to the control function 191a from the storage circuit 180. It is realized by executing. Further, step S702 is realized, for example, when the processing circuit 190a calls and executes a program corresponding to the prediction function 195a from the storage circuit 180. Step S703 is realized by, for example, the processing circuit 190a calling and executing a program corresponding to the adjustment function 193a from the storage circuit 180. Steps S504 and S505 are realized, for example, by the processing circuit 190a calling and executing a program corresponding to the update function 194a from the storage circuit 180.

  When adjusting the execution timing of offset calibration in a plurality of FPDs 150, for example, as shown in FIG. 14, in the medical image diagnostic system 1a according to the present embodiment, first, the processing circuit 190a starts an inspection (step S601), it is determined whether or not it is time to perform regular offset calibration (step S602). Here, when it is not the time for performing the regular offset calibration (No in step S602), the processing circuit 190a is in a standby state until the time for the execution is reached.

  On the other hand, when it is the time for performing the regular offset calibration (Yes at Step S602), the processing circuit 190a adjusts the time for performing the offset calibration in the FPD 150 currently in use after the photographing is finished (Step S603). Then, the processing circuit 190a performs offset calibration in the FPD 150 that is not currently used (step S604).

  When adjusting the execution timing of the offset calibration performed for each predetermined condition, for example, as shown in FIG. 15, in the medical image diagnostic system 1a according to the present embodiment, first, the processing circuit 190a starts the examination. (Step S701), it is determined whether or not it is time to perform periodic offset calibration (Step S702). Here, when it is not the time for performing the regular offset calibration (No in step S702), the processing circuit 190a is in a standby state until the time for the execution is reached.

  On the other hand, when it is the time for performing the regular offset calibration (Yes at Step S702), the processing circuit 190a determines whether or not a predetermined condition is satisfied (Step S703). For example, the processing circuit 190a changes the position of the bed when a plurality of parts are imaging target parts and the target parts are different parts that are not adjacent to each other, or when the position of the FPD 150 is changed. In this case, it is determined whether or not the X-ray tube is being moved, or whether the examination room door where the X-ray diagnostic apparatus is arranged is open.

  Here, when the predetermined condition is satisfied (Yes at Step S703), the processing circuit 190a performs offset calibration (Step S704), and determines whether or not the inspection is completed (Step S705). On the other hand, when the predetermined condition is not satisfied (No at Step S703), the processing circuit 190a determines whether the inspection is finished (Step S705). In step S705, when the inspection is finished (Yes in step S705), the processing circuit 190a finishes the process. On the other hand, if the inspection has not been completed (No at Step S705), the processing circuit 190a returns to Step S702 and determines whether it is the time for performing the regular offset calibration.

  As described above, according to the third embodiment, the prediction function 195a predicts the collection time of image data for each FPD 150 during the inspection. The adjustment function 193 a adjusts the time for performing the regular offset calibration of the offset correction value for each FPD 150 based on the image data collection time in each FPD 150. Therefore, the medical image diagnostic system 1a according to the third embodiment can perform offset calibration according to the usage status of each FPD when using a plurality of FPDs 150, which hinders the operation by the operator. Without degrading the image quality.

  In addition, according to the third embodiment, the adjustment function 193a performs the periodic offset calibration of the offset correction value so that the periodic update of the offset correction value is executed at the time when the predetermined event under examination occurs. Adjust the implementation time of the project. Therefore, the medical image diagnostic system 1a according to the third embodiment can perform the offset calibration in the time zone when the FPD 150 is not used even during the examination, and can efficiently perform the offset calibration. To.

(Fourth embodiment)
The first to third embodiments have been described so far, but may be implemented in various different forms other than the first to third embodiments described above.

  In the above-described embodiment, the case where the medical image diagnostic system 1 and the medical image diagnostic system 1a execute various processes has been described. However, the embodiment is not limited to this, and for example, various processes may be executed in the FPD 150. 16 and 17 are block diagrams illustrating an example of the configuration of the FPD 150 according to the fourth embodiment. Here, FIG. 16 is a block diagram showing the configuration of the FPD 150 when executing the various processes described in the first embodiment, and FIG. 17 shows the various processes described in the second and third embodiments. It is a block diagram which shows the structure of FPD150 in the case of performing.

  As illustrated in FIG. 16, the processing circuit 151 executes a control function 1511, an acquisition function 1512, an adjustment function 1513, and an update function 1514. The control function 1511, the acquisition function 1512, the adjustment function 1513, and the update function 1514 are recorded in the storage circuit 152 in the form of a program that can be executed by a computer. The processing circuit 151 is a processor that implements a function corresponding to each program by reading the program from the storage circuit 152 and executing the program. In other words, the processing circuit 151 in a state where each program is read has each function shown in the processing circuit 151 of FIG.

  A control function 1511 controls the entire processing by the FPD 150. The processing by the FPD 150 is a series of processing related to collection of image data and generation and transmission of data used for correction of an X-ray image. The acquisition function 1512 executes the same processing as that of the acquisition function 192 described above. The adjustment function 1513 performs the same processing as the adjustment function 193 described above. The update function 1514 performs the same processing as the update function 194 described above. The storage circuit 152 stores data used when the processing circuit 151 controls the entire processing by the FPD 150. For example, the storage circuit 152 stores each program executed by the processing circuit 151.

  As shown in FIG. 17, the processing circuit 151a executes a control function 1511a, a prediction function 1515a, an adjustment function 1513a, and an update function 1514a. The control function 1511a, the prediction function 1515a, the adjustment function 1513a, and the update function 1514a are recorded in the storage circuit 152 in the form of a program that can be executed by a computer. The processing circuit 151a is a processor that implements a function corresponding to each program by reading the program from the storage circuit 152 and executing the program. In other words, the processing circuit 151a in the state where each program is read has the functions shown in the processing circuit 151a of FIG.

  The control function 1511a controls the entire processing by the FPD 150. The prediction function 1515a performs the same process as the prediction function 195a described above. The adjustment function 1513a performs the same processing as the adjustment function 193a described above. The update function 1514a executes the same processing as the update function 194a described above. The storage circuit 152 stores data used when the processing circuit 151 a controls the entire processing by the FPD 150. For example, the storage circuit 152 stores each program executed by the processing circuit 151a.

  Moreover, although FIG. 2, FIG.9, FIG16 and FIG.17 mentioned above demonstrated the example in case each processing function is implement | achieved by the single processing circuit, embodiment is not restricted to this. For example, the processing circuit may be configured by combining a plurality of independent processors, and each processor may realize each processing function by executing each program. In addition, each processing function of the processing circuit may be realized by being appropriately distributed or integrated into a single or a plurality of processing circuits.

  The term “processor” used in the description of each embodiment described above is, for example, a CPU (Central Processing Unit), a GPU (Graphics Processing Unit), or an application specific integrated circuit (ASIC). Circuits such as programmable logic devices (for example, Simple Programmable Logic Device (SPLD), Complex Programmable Logic Device (CPLD), and Field Programmable Gate Array (FPGA)) Means. Here, instead of storing the program in the storage circuit, the program may be directly incorporated in the circuit of the processor. In this case, the processor realizes the function by reading and executing the program incorporated in the circuit. In addition, each processor of the present embodiment is not limited to being configured as a single circuit for each processor, but may be configured as a single processor by combining a plurality of independent circuits to realize its function. Good.

  Here, the program executed by the processor is provided by being incorporated in advance in a ROM (Read Only Memory), a storage unit, or the like. This program is a file in a format installable or executable in these apparatuses, such as a CD (Compact Disk) -ROM, an FD (Flexible Disk), a CD-R (Recordable), a DVD (Digital Versatile Disk), or the like. It may be provided by being recorded on a computer-readable storage medium. The program may be provided or distributed by being stored on a computer connected to a network such as the Internet and downloaded via the network. For example, this program is composed of modules including each functional unit. As actual hardware, the CPU reads a program from a storage medium such as a ROM and executes it, whereby each module is loaded on the main storage device and generated on the main storage device.

  According to at least one embodiment described above, it is possible to avoid a reduction in image quality without hindering an operation by an operator.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are also included in the invention described in the claims and the equivalents thereof.

1, 1a Medical diagnostic imaging system 150 FPD
151, 151a, 190, 190a Processing circuit 191, 191a, 1511, 1511a Control function 192, 1512 Acquisition function 193, 193a, 1513, 1513a Adjustment function 194, 194a, 1514, 1514a Update function 195a, 1515a Prediction function

Claims (11)

An acquisition unit for acquiring reservation inspection information indicating inspection reservation information;
An adjustment unit that adjusts an update time of a correction value for correcting a medical image based on the reserved examination information;
An update unit that updates the correction value at an update time adjusted by the adjustment unit;
A medical image diagnostic system comprising:   The adjustment unit identifies the time of execution of the inspection based on the reserved inspection information, and when the update time of the periodic update of the correction value overlaps with the time of execution of the inspection, the adjustment value is periodically updated. The medical image diagnosis system according to claim 1, wherein an update time of the periodic update is adjusted so that the update is performed before the examination is performed.   The adjustment unit adjusts the update timing of the periodic correction value so that the periodic update of the correction value is executed at the occurrence timing of a predetermined event related to the inspection. The medical image diagnostic system according to 2.   The adjustment unit estimates the time from the occurrence time of the predetermined event to the execution time of the inspection, and when the estimated time is shorter than the time until the next update time of the periodic update of the correction value The medical image diagnostic system according to claim 3, wherein an update timing of the periodic update of the correction value is adjusted so that the periodic update of the correction value is executed at the occurrence timing of the predetermined event. A prediction unit that predicts the collection time of medical images during the examination,
An adjustment unit that adjusts an update time of a correction value for correcting the medical image based on a prediction result of the collection time of the medical image;
An update unit that updates the correction value at an update time adjusted by the adjustment unit;
A medical image diagnostic system comprising: The prediction unit predicts the remaining number of times of collection of the medical image in the examination based on the collection time of the medical image,
The adjustment unit periodically updates the correction value so that the correction value is periodically updated after completion of the examination when the remaining number of times of collection of the medical image is less than a predetermined number. The medical image diagnosis system according to claim 5, wherein the update time of the medical image is adjusted.   The adjustment unit adjusts the update timing of the correction value periodically so that the correction value is periodically updated every time the number of collections of the medical images reaches a predetermined number. Item 6. The medical image diagnostic system according to Item 5. The prediction unit predicts the collection time of the medical image for each detector during the examination,
The medical image diagnosis system according to claim 5, wherein the adjustment unit adjusts an update time of periodic update of correction values for each detector based on the collection time of the medical image in each detector.   The adjustment unit adjusts the update time of the periodic update of the correction value so that the periodic update of the correction value is performed at the time of occurrence of a predetermined event during the inspection. The medical image diagnostic system according to any one of claims 8 to 9. An acquisition unit for acquiring reservation inspection information indicating inspection reservation information;
An adjustment unit that adjusts an update time of a correction value for correcting a medical image based on the reserved examination information;
An update unit that updates the correction value at an update time adjusted by the adjustment unit;
An X-ray detector comprising: A prediction unit that predicts the collection time of medical images during the examination,
An adjustment unit that adjusts an update time of a correction value for correcting the medical image based on a prediction result of the collection time of the medical image;
An update unit that updates the correction value at an update time adjusted by the adjustment unit;
An X-ray detector comprising:

Images