JP2011206198A - Management device of radiation detector, system, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To determine order of priority of a radiation detector used for photography in accordance with situations.SOLUTION: When an order is selected, a determination part 47 determines whether or not power is supplied to respective radiation detectors 25, 28, 31, 34 and determines remaining power amounts of batteries 26, 29 of the radiation detectors 25, 28 for supplying the respective radiation detectors 25, 28 with power. A determination part 48 excludes the radiation detectors 25, 28 of which the remaining power amounts of the batteries 26, 29 are not enough and excludes the radiation detectors 25, 28, 31, 34 not suited to a photography format designated in order on the basis of the determination result by the determination part 47. The determination part 48 takes into account whether or not power is supplied on the basis of a determination result by the determination part 47 to compare completion times with each other when photography is performed by the radiation detectors 25, 28, 31, 34 and determines order of the radiation detectors 25, 28, 31, 34 based on shorter completion times of them as order of priority.

Description

  The present invention relates to a radiation detector management apparatus, system, and program for determining a radiation detector to be used for imaging based on an order.

  A radiation imaging system that emits radiation (X-rays) toward a subject is known. The radiation imaging system includes a radiation detector that detects radiation transmitted through a subject. As a radiation detector, an imaging plate (IP) and a flat panel detector (FPD) capable of directly converting radiation into image data have been put into practical use. IP and FPD are available in various sizes and types (portable type and fixed type) depending on the application.

  The radiation imaging system described in Patent Literature 1 includes a plurality of radiation detectors. In this radiation imaging system, a radiation detector determined based on an order such as a part to be a subject is used. If the selected radiation detector is not used, an alternative radiation detector is determined with a predetermined priority. By selecting the radiation detector to be used according to the priority order, it is possible to perform imaging without bothering the technician.

JP 2002-200063 A (paragraph [0068] etc.)

  However, dynamic factors such as the state of the power supply in the radiation detector are not taken into consideration, and there is a possibility that the radiation detector is determined to be unusable. Further, Patent Document 1 does not explicitly disclose in what order the radiation detector is determined.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a radiation detector management apparatus, system, and program for determining the priority order of radiation detectors used in imaging according to the situation. And

  In order to achieve the above object, a radiation detector management apparatus according to the present invention is based on a determination unit that determines a time-dependent change state of a plurality of radiation detectors and a determination result by the determination unit. And a determination unit that determines the priority order of the radiation detectors used in the imaging based on the image.

  A first table that records, for each radiation detector, a first required time required to be usable after power is turned on, and a second required time required for imaging based on one order; The determination unit determines whether or not power is turned on for each radiation detector, and the determination unit refers to the first table with respect to the radiation detector that is turned on. Compares the second required time, the total of the first and second required times for the radiation detector that is not turned on, as the completion time required to complete each imaging, It is preferable that the order from the radiation detector with the short completion time be the priority.

  A second table that records the amount of power required for imaging based on one order for each of the radiation detectors driven by the power of the battery, and the determination unit drives the remaining amount of the battery by the power of the battery Preferably, the determination unit performs the determination by referring to the second table and excluding the radiation detector whose remaining battery level is less than the required amount.

  It is provided with a third table in which whether or not it is suitable for the imaging format specified by the order is recorded for each radiation detector, and the determination unit refers to the third table and is specified by the order. Preferably, the determination is made by excluding the radiation detectors that are not suitable for the type of imaging performed.

  The radiation detector management system of the present invention includes a plurality of radiation detectors, a determination unit that determines a state of the radiation detector that changes over time, and imaging based on an order based on a determination result by the determination unit. And a management device having a determination unit for determining the priority order of the radiation detectors used in the above.

  The radiation detector management program according to the present invention includes a determination unit that determines a state of the radiation detector that changes with time, and the radiation detector that is used in imaging based on an order based on a determination result by the determination unit. The computer of the management apparatus is made to function as a determining unit that determines the priority order.

  According to the present invention, a state in which a plurality of radiation detectors change with time is determined, and the priority order of the radiation detectors used in imaging based on the order is determined based on the determination result. Priorities of radiation detectors used for imaging can be determined according to the situation.

It is a figure which shows schematically the structure of the management system of a radiation detector. It is a block diagram which shows roughly the electrical structure of a console. It is a figure which shows an order table schematically. It is a figure which shows a 1st determination table roughly. It is a figure which shows the 2nd determination table schematically. It is a figure which shows a 3rd determination table schematically. It is a flowchart explaining the effect | action of the management system of a radiation detector.

  As shown in FIG. 1, a radiation detector management system (hereinafter simply referred to as a management system) 11 according to the present invention includes first, second, third, and fourth modalities 12 that are used in radiographic imaging. 13, 14, 15, and a console 16 that centrally manages the modalities 12 to 15. The modalities 12 to 15 are respectively disposed in the first, second, third, and fourth radiography rooms 17, 18, 19, and 20, and the console 16 is operated adjacent to each radiography room 17 to 20. It is arranged in the chamber 21.

  In the management system 11, modalities 12 to 15 to be used for imaging are determined based on orders from a hospital information system (HIS) or a radiation information system (RIS) (both not shown). The

  The first modality 12 includes a radiation generator 24 that irradiates a subject (not shown) with radiation, and a radiation detector 25 that detects radiation that has passed through the subject.

  The radiation generator 24 includes a radiation tube 24a that generates radiation and a collimator 24b that limits the radiation irradiation range. The radiation generator 24 is movably supported by a support device (not shown). For example, the radiation generator 24 is moved by the support device so as to face the radiation detector 25, and the radiation irradiation range is changed in accordance with the imaging format (part to be a subject) set on the console 16. .

  The radiation detector 25 is, for example, a portable FPD cassette having a half-cut size (383.5 mm × 459.0 mm × 14.0 mm), and has high handleability and portability. The radiation detector 25 has a structure in which, for example, a pixel electrode, a photoelectric film, and a bias electrode formed for each pixel are stacked on a glass substrate on which a TFT (thin film transistor) is formed.

  The photoconductive film is made of amorphous selenium or the like, and generates an electric charge according to the radiation quality and dose of the radiation upon incidence of the radiation. A bias voltage is applied between the bias electrode and the pixel electrode, an electric field is generated in the photoconductive film due to the bias voltage, and charges generated in the photoconductive film are collected in the pixel electrode. The pixel electrode constitutes an electrode above the capacitor that accumulates the collected charges. The pixel electrode is connected to the TFT, and the electric charge accumulated in the capacitor is read out through the TFT. The electric charges read out by the TFT are converted into digital image data by an A / D converter.

  The radiation detector 25 performs wireless communication with the console 16 via an antenna (not shown), and transmits and receives various data including image data. The radiation detector 25 includes a battery 26 that supplies power to each unit.

  Similar to the first modality 12, the second modality 13 includes a radiation generator 27 and a radiation detector 28. As with the radiation generator 24, the radiation generator 27 includes a radiation tube 27a and a collimator 27b.

  The radiation detector 28 is, for example, a half-cut fixed FPD, and is fixed to a support device (not shown). The other configuration of the radiation detector 28 is the same as that of the radiation detector 25 and includes a battery 29.

  Similar to the first modality 12, the third modality 14 includes a radiation generator 30 and a radiation detector 31. As with the radiation generator 24, the radiation generator 30 includes a radiation tube 30a and a collimator 30b.

  The radiation detector 31 performs wired communication with the console 16 via the cable 32, and transmits and receives various data including image data. The radiation detector 31 does not include a battery and is driven by electric power from a commercial power source supplied via a cable 32. Other configurations of the radiation detector 31 are the same as those of the radiation detector 25.

  The fourth modality 15 includes an image reader 35 that reads image data from the radiation detector 34 in addition to the radiation generator 33 and the radiation detector 34. As with the radiation generator 24, the radiation generator 33 includes a radiation tube 33a and a collimator 33b.

  The radiation detector 34 is, for example, a half-cut portable IP cassette, and has high handleability and portability. The radiation detector 34 includes a cassette 34a made of a material that transmits radiation, and an IP 34b accommodated in the cassette 34a.

  The IP 34b has a structure in which a conductive layer is provided on a plastic substrate, and the photostimulable phosphor is coated on the conductive layer, and the photostimulable phosphor is covered with a protective film. The photostimulable phosphor is barium iodide fluoride (BaFI) or the like, and a latent image (image data) is recorded by the incidence of radiation.

  The image reader 35 has a loading port 35a, and the radiation detector 34 is loaded into the loading port 35a. The image reader 35 includes a barcode reader that reads a barcode attached to the cassette 34a, and a scanning unit that reads a latent image from the stimulable phosphor of IP34b. The latent image recorded on the photostimulable phosphor receives the excitation light emitted from the scanning unit and is read out as photostimulated luminescence light. Then, it is converted into digital image data by an A / D converter.

  The image reader 35 performs wired communication with the console 16 via the cable 36, and transmits and receives various data including image data. Bar code information read from the cassette 34a is added to the image data transmitted from the image reader 35, and the image data can be distinguished from each other. The image reader 35 is driven by power from a commercial power source.

  As shown in FIG. 2, the console 16 includes a control unit 41, a communication unit 42, an image processing unit 43, a storage 44, a display unit 45, and an operation unit 46.

  The control unit 41 includes, for example, a CPU that performs various arithmetic processes, a ROM that stores control programs and control data executed by the CPU, a RAM that loads programs and various data, and is used as a work memory for the CPU, and the like. And controls all parts of the console 16 in an integrated manner.

  The communication unit 42 performs wired communication or wireless communication with the HIS, RIS, and modalities 12 to 15 and transmits and receives various data including orders and image data.

  The image processing unit 43 performs various image processes on the image data received from the modalities 12 to 15. The storage 44 stores image data after image processing. The display unit 45 includes a monitor 45a such as an LCD, and a display control circuit 45b that displays images taken by the modalities 12 to 15 and various operation screens on the monitor 45a.

  The operation unit 46 includes a keyboard and a mouse and is used for various settings and operations. The operation unit 46 includes a photographing switch for performing photographing. The engineer operates the operation unit 46 in accordance with the order displayed on the monitor 45a and executes photographing.

  The storage 44 stores an order table 51 shown in FIG. 3, a first determination table 52 shown in FIG. 4, a second determination table 53 shown in FIG. 5, and a third determination table 54 shown in FIG. Yes.

  In the order table 51, orders from HIS and RIS are listed in the order of acceptance. Each order includes an order ID, request source information (for example, name of medical department, doctor's name), subject information (for example, name, age), imaging format (for example, subject region, imaging Direction), shooting status (not shooting, shooting completed), and the like. Each item is described when an order is received or when image data is stored. The order ID is selected when shooting is performed. Shooting is performed based on the selected order.

  The first determination table 52 includes a time required for each of the radiation detectors 25, 28, 31, and 34 to be usable after the power is turned on (hereinafter referred to as a first required time). In addition, a time required for photographing based on one order (hereinafter referred to as a second required time) is recorded in advance. However, for the radiation detector 34, which is an IP cassette that does not require the power to be turned on, the first required time is the time required from when the image reader 35 is turned on until the image data can be read. Is recorded in advance. In FIG. 4, reference numerals 25, 28, 31, and 34 are attached for convenience of explanation, but these do not constitute the first determination table 52.

  In the second determination table 53, the required amount of power required for imaging based on one order is recorded in advance for each of the radiation detectors 25 and 28 driven by the power of the batteries 26 and 29. The required amount is recorded, for example, as a percentage of full charge, that is, what percentage of full charge. In FIG. 5, reference numerals 25 and 28 are attached for convenience of explanation, but these do not constitute the second determination table 53.

  In the third determination table 54, whether or not each of the radiation detectors 25, 28, 31, and 34 is suitable for the type of imaging specified in the order (part to be a subject, direction of imaging) is determined. Are recorded in advance for each format. In FIG. 6, reference numerals 25, 28, 31, and 34 are attached for convenience of explanation, but these do not constitute the third determination table 54.

  Returning to the description of FIG. The control unit 41 determines the state of each radiation detector 25, 28, 31, and 34 that changes with time, and based on the determination result by the determination unit 47, detects the radiation used for imaging based on the order. It functions as a determination unit 48 that determines the priority order of the devices.

  The determination unit 47 controls the communication unit 42 to transmit a confirmation signal for confirming the power supply state to each of the radiation detectors 25, 28, 31, 34. The determination unit 47 determines whether or not the power of each radiation detector 25, 28, 31, 34 is turned on based on the presence / absence of a response signal from each radiation detector 25, 28, 31, 34 based on the confirmation signal. Determine.

  The response signals from the radiation detectors 25 and 28 driven by the power of the batteries 26 and 29 include information on the remaining amount of the batteries 26 and 29. The determination unit 47 determines the remaining amount of the batteries 26 and 29 based on response signals from the radiation detectors 25 and 28 driven by the power of the batteries 26 and 29. In some cases, the radiation detectors 25 and 28 are not turned on, and a response signal from the radiation detectors 25 and 28 cannot be received. In this case, the determination unit 47 determines the remaining amounts of the batteries 26 and 29 based on the response signal received last when the radiation detectors 25 and 28 are powered on.

  The determination unit 48 refers to the second determination table 53, and the radiation detector 25 in which the remaining amount of the batteries 26 and 29 determined by the determination unit 47 is lower than the required amount of power required for imaging based on one order. 28 is excluded from those used for photographing based on orders.

  The determination unit 48 refers to the third determination table 54, and selects the radiation detectors 25, 28, 31, and 34 that are not suitable for the imaging format (subject area, imaging direction) specified in the order. Excluded from those used in photography based on.

  The determination unit 48 refers to the first determination table 52 and determines the second required time for the radiation detectors 25, 28, 31, and 34 that are determined to be powered on by the determination unit 47. For the radiation detectors 25, 28, 31, and 34 determined that the power is not turned on by the unit 47, the total of the first and second required times is mutually determined as the completion time required for completing the imaging. In comparison, the order from the radiation detectors 25, 28, 31, and 34 having a short completion time is determined as the priority order.

  The control unit 41 controls the display control circuit 45b to display on the monitor 45a an operation screen for selecting whether or not to perform imaging with the radiation detectors 25, 28, 31, and 34 having the highest priority. When it is selected that imaging is performed by the radiation detectors 25, 28, 31, and 34 having the highest priority, the control unit 41 uses the radiation detectors 25, 28, 31, and 34 for imaging. Set. On the other hand, when it is selected not to perform imaging by the radiation detectors 25, 28, 31, and 34 having the highest priority, the control unit 41 controls the display control circuit 45b to give the radiation having the second priority. An operation screen for selecting whether or not to perform photographing with the detectors 25, 28, 31, and 34 is displayed on the monitor 45a. Thereafter, the control unit 41 performs the same processing as described above.

  Next, the operation of the radiation detector management system 11 configured as described above will be described with reference to the flowchart shown in FIG. When the operation unit 46 is operated to select an order (step (hereinafter abbreviated as S) 11), the determination unit 47 in the control unit 41 causes each radiation detector 25, 28, 31, 34 based on the confirmation signal. Based on the presence / absence of a response signal from, the radiation detectors 25, 28, 31, and 34 are determined whether or not the power is turned on (S12), and radiation detection that is driven by the power of the batteries 26 and 29 is performed. Based on the response signals from the devices 25 and 28, the remaining amount of the batteries 26 and 29 is determined (S13).

  The determination unit 48 excludes the radiation detectors 25 and 28 in which the remaining amount of the batteries 26 and 29 is insufficient based on the determination result by the determination unit 47 (S14), and sets the imaging format specified in the order. The unsuitable radiation detectors 25, 28, 31, and 34 are excluded (S15). Then, the determination unit 48 considers whether or not the power is turned on based on the determination result by the determination unit 47, and determines the completion time when the radiation detectors 25, 28, 31, and 34 are captured. In comparison, the order from the radiation detectors 25, 28, 31, and 34 having a short completion time is determined as a priority (S16).

  The control unit 41 controls the display control circuit 45b to display, on the monitor 45a, an operation screen for selecting the radiation detectors 25, 28, 31, and 34 used for imaging based on the priority order determined by the determination unit 48. (S17). And imaging | photography is performed by the selected radiation detectors 25, 28, 31, and 34 (S18).

  As described above, the state of the radiation detector that changes over time, such as the power-on state and the remaining battery state, is determined, and based on the determination result, the radiation detector used for imaging based on the order is determined. Since the priority order is determined, the priority order of the radiation detectors used in the imaging based on the order can be determined according to the situation.

  In the above embodiment, the radiation detector used for imaging may be designated in advance on the order from HIS or RIS. In this case, in the management system 11, the engineer determines that the radiation imaging apparatus specified in the order is inappropriate for imaging, or the determination unit 47 determines that the radiation detector specified in the order cannot be used. When determining the priority of the radiation detector that substitutes for the designated radiation detector.

11 Radiation Detector Management System 25, 28, 31, 34 Radiation Detector 26, 29 Battery 35 Image Reader 47 Determination Unit 48 Determination Unit 52 First Determination Table 53 Second Determination Table 54 Third Determination Table

Claims (6)

A determination unit that determines a state of the plurality of radiation detectors that changes over time;
A radiation detector management apparatus comprising: a determination unit configured to determine a priority order of the radiation detectors used in imaging based on an order based on a determination result by the determination unit. A first table that records, for each radiation detector, a first required time required to be usable after power is turned on, and a second required time required for imaging based on one order;
The determination unit determines whether or not power is turned on for each radiation detector,
The determination unit refers to the first table, the second required time for the radiation detector that is powered on, and the first time for the radiation detector that is not powered on. The total of the second required times is compared with each other as a completion time required for completing the imaging, and the order from the radiation detector having the short completion time is set as the priority. Item 2. The radiation detector management apparatus according to Item 1. A second table that records the required amount of power required for imaging based on one order for each radiation detector driven by battery power,
The determination unit determines the remaining amount of the battery for each radiation device that is driven by the power of the battery,
3. The radiation according to claim 1, wherein the determination unit refers to the second table and performs the determination by excluding the radiation detector whose remaining battery capacity is less than the required amount. Detector management device. A third table is recorded for each radiation detector as to whether or not it is suitable for the type of imaging specified in the order,
4. The determination unit according to claim 1, wherein the determination unit refers to the third table and performs the determination by excluding the radiation detector that is not suitable for an imaging format specified by an order. The radiation detector management device according to claim 1. A plurality of radiation detectors;
A determination unit that determines a state of the radiation detector that changes with time, and a management unit that determines a priority order of the radiation detector used in imaging based on an order based on a determination result by the determination unit And a radiation detector management system. A determination unit for determining a state of the radiation detector that changes over time;
A radiation detector management program that causes a computer of a management device to function as a determination unit that determines the priority order of the radiation detectors used in imaging based on an order based on a determination result by the determination unit.

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