Temperature adjustment apparatus, method, and program for radiation imaging apparatus, and radiation imaging apparatus

Abstract

To prevent deterioration of a detector due to a heat cycle in a radiographic apparatus, and a temperature adjustment device, method and program thereof.SOLUTION: The processor acquires instruction information for setting the radiography apparatus to a power saving mode in which power consumption is smaller than that during operation and information on a maintaining time for maintaining the power saving mode, sets a holding temperature of the detector in the power saving mode according to the maintaining time in a case where the maintaining time is equal to or greater than a predetermined first threshold value, and controls driving of the temperature adjuster such that the detector has the holding temperature.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present disclosure relates to a temperature adjustment device, method, and program for a radiation imaging apparatus, and the radiation imaging apparatus. [Background technology]

[0002] In recent years, the miniaturization of detectors used in CT (Computed Tomography) systems has progressed, creating a need to improve the reliability of detector connections. The miniaturization of detector elements is particularly notable in photon-counting detectors used in PCCT (Photon Counting Computed Tomography) systems. Furthermore, due to the heat resistance of the detectors used, there are limitations on high-temperature joining processes such as soldering, so conductive epoxy is often used for joining, and improving the reliability of the connections is essential.

[0003] The detectors used in CT systems must maintain constant sensitivity characteristics with high precision, so the detectors are heated with a heater or cooled with a fan to prevent changes in sensitivity due to changes in the ambient temperature.

[0004] On the other hand, if a detector with miniaturized detection elements is kept at high temperatures, problems such as deterioration of the materials and the joints of the detection elements due to heat will arise. Furthermore, power consumption will also increase. For this reason, methods have been proposed for lowering the temperature of the detector when the device is not in use, such as at night (see Patent Documents 1 and 2). [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2003-014860 [Patent Document 2] Japanese Patent Application Laid-Open No. 2016-086933 Summary of the Invention [Problem to be solved by the invention]

[0006] However, heating and cooling the detector can accelerate detector degradation due to heat cycling.

[0007] The present disclosure has been made in consideration of the above circumstances, and aims to prevent deterioration of a detector due to heat cycles. [Means for solving the problem]

[0008] A temperature adjustment device for a radiation imaging apparatus according to the present disclosure is a temperature adjustment device for a radiation imaging apparatus including a detector that detects radiation emitted from a radiation source and transmitted through a subject, and a temperature adjuster that adjusts the temperature of the detector, a processor; The processor acquires instruction information for setting the radiation imaging apparatus to a power-saving mode in which power consumption is lower than during operation, and information on the duration for which the power-saving mode is to be maintained; If the maintenance time is equal to or greater than a predetermined first threshold value, the maintenance temperature of the detector in the power saving mode is set according to the maintenance time; The temperature regulator is controlled so that the detector is at the holding temperature.

[0009] In the temperature adjustment device according to the present disclosure, the processor may control the operation of the temperature adjuster so that the detector reaches the holding temperature at a constant rate after the power saving mode is set.

[0010] In addition, in a temperature adjustment device according to the present disclosure, when the processor is set to a power saving mode, if the ambient temperature of the detector is equal to or higher than a predetermined second threshold, the processor may delay the start of the process of controlling the operation of the temperature adjuster more than if the ambient temperature of the detector is less than the second threshold.

[0011] In the temperature adjustment device according to the present disclosure, the processor may prohibit the process of controlling the operation of the temperature adjuster so that the detector is at the holding temperature when the holding time is less than the first threshold value.

[0012] The radiation imaging apparatus according to the present disclosure includes a detector that detects radiation emitted from a radiation source and transmitted through a subject. a temperature regulator for adjusting the temperature of the detector; and a temperature adjustment device according to the present disclosure.

[0013] In the radiation imaging apparatus according to the present disclosure, the detector may be a photon counting detector that outputs a detection signal corresponding to the photon energy of the radiation.

[0014] In the radiation imaging apparatus according to the present disclosure, the temperature adjustment device may include a heater.

[0015] In the radiation imaging apparatus according to the present disclosure, the temperature adjustment device may include a cooling fan.

[0016] A temperature adjustment method for a radiation imaging apparatus according to the present disclosure is a temperature adjustment method for a radiation imaging apparatus including a detector that detects radiation emitted from a radiation source and transmitted through a subject, and a temperature adjuster that adjusts the temperature of the detector, The computer acquires instruction information for setting the radiation imaging apparatus to a power-saving mode in which power consumption is lower than that during operation, and information on the duration for which the power-saving mode is to be maintained; If the maintenance time is equal to or greater than a predetermined first threshold value, the maintenance temperature of the detector in the power saving mode is set according to the maintenance time; The temperature regulator is controlled so that the detector is at the holding temperature.

[0017] A temperature adjustment program for a radiation imaging apparatus according to the present disclosure is a temperature adjustment program for a radiation imaging apparatus including a detector that detects radiation emitted from a radiation source and transmitted through a subject, and a temperature adjuster that adjusts the temperature of the detector, a step of acquiring instruction information for setting the radiation imaging apparatus to a power saving mode in which power consumption is lower than that during operation, and information on a duration for which the power saving mode is to be maintained; a step of setting a holding temperature of the detector in the power saving mode in accordance with the holding time when the holding time is equal to or greater than a predetermined first threshold value; The computer is caused to execute a procedure for controlling the driving of the temperature regulator so that the detector is at the holding temperature.

[0018] The technology of the present disclosure can also be applied to temperature adjustment program products. [Effects of the Invention]

[0019] According to the present disclosure, it is possible to prevent deterioration of the detector due to heat cycles. [Brief explanation of the drawings]

[0020] [Figure 1] 1 is a schematic configuration diagram of a medical imaging system including a radiation imaging apparatus equipped with a temperature adjustment device according to an embodiment of the present disclosure; [Figure 2] FIG. 1 is a diagram for explaining a configuration related to temperature adjustment of a detector panel. [Figure 3] FIG. 1 is a diagram showing a hardware configuration of a temperature adjustment device according to an embodiment of the present invention. [Figure 4] FIG. 1 is a diagram showing a functional configuration of a temperature adjustment device according to an embodiment of the present invention. [Figure 5] A flowchart showing the processing performed in this embodiment DETAILED DESCRIPTION OF THE INVENTION

[0021] Hereinafter, an embodiment of the present disclosure will be described in detail with reference to the drawings. First, an example of the configuration of a medical image capturing system including a radiation imaging apparatus equipped with a temperature adjustment device of this embodiment will be described. Fig. 1 is a schematic diagram of a medical image capturing system equipped with a radiation imaging apparatus of this embodiment.

[0022] As shown in Fig. 1, a medical imaging system 1 of this embodiment includes a CT device 2 and a console 3. The CT device 2 includes a gantry 4 and a bed 8. In the following description, the horizontal direction in Fig. 1 is defined as the X-axis, the vertical direction as the Y-axis, and the direction perpendicular to the XY plane as the Z-axis. The CT device 2 is an example of a radiographic device of the present disclosure.

[0023] The gantry 4 has an opening 4A, and the subject H to be imaged is placed inside the opening 4A while being placed on a bed 8. The gantry 4 and the bed 8 are capable of moving relatively in the Z-axis direction.

[0024] Inside the gantry 4, a radiation source 5 having a radiation tube 6 and a bowtie filter 7, and a detector panel 9 are arranged facing each other across the subject H. The gantry 4 also includes a rotating plate 4B fixed at a position where the radiation source 5 and the detector panel 9 face each other, and a drive mechanism (not shown) for rotating the rotating plate 4B.

[0025] The bowtie filter 7 optimizes the radiation exposure by increasing the radiation dose near the center and decreasing the radiation dose around the periphery to reduce the radiation exposure in the peripheral area. The radiation emitted from the radiation tube 6 is shaped by the bowtie filter 7 into a beam suitable for the size of the subject H, and is then irradiated onto the subject H.

[0026] The detector panel 9 detects radiation that has passed through the subject H and generates projection data corresponding to the detected radiation dose. As an example, the detector panel 9 in this embodiment is a photon-counting detector in which a plurality of detection elements that detect photon energy, which is the energy of photons of incident radiation, are arranged in an arc shape centered on the focal point of the radiation tube 6. The detector panel 9 outputs projection data corresponding to the photon energy. The pixel value at each pixel position of the projection data becomes the value of the detection signal output from each detection element.

[0027] The detector panel 9 is configured by arranging a plurality of detector modules 9A in an arc shape in the X direction. The direction along the arc along which the detector modules 9A are arranged is called the channel direction.

[0028] Moreover, the CT apparatus 2 according to this embodiment includes a temperature adjustment device 10 for adjusting the temperature of the detector panel 9. The temperature of the detector panel 9 is controlled by the temperature adjustment device 10. The configuration related to the temperature adjustment of the detector panel 9 will be described later.

[0029] In this embodiment, X-rays are used as an example of radiation.

[0030] The radiation tube 6 and the detector panel 9 are rotated around the subject H by rotating the rotating plate 4B using a drive mechanism. The irradiation of radiation from the radiation tube 6 and the detection of radiation by the detector panel 9 are repeated as both rotate, thereby obtaining a plurality of projection data at various projection angles for the subject H. The plurality of projection data obtained by the detector panel 9 is output to the console 3 and reconstructed into a tomographic image.

[0031] The dose of radiation emitted from the radiation tube 6, the rotation speed of the rotating plate 4B in the gantry 4, and the relative movement speed between the gantry 4 and the bed 8 are set by the console 3 based on the acquisition conditions for acquiring projection data input by a user such as a technician.

[0032] The console 3 of this embodiment controls the driving of the CT device 2, controls the acquisition of projection data by imaging the subject H, generates medical images, and controls material decomposition, etc., using input from an operator and programs for performing various processes. Here, in this embodiment, various modes for driving the CT device 2 can be set. For example, in this embodiment, it is possible to set an operation mode in which the CT device 2 is kept activated so that the CT device 2 can immediately image the subject H, and a power-saving mode in which the CT device 2 is kept powered on for adjusting the temperature of the detector panel 9, etc., even though imaging of the subject H is not performed at night, for example. In the power-saving mode, the CT device 2 consumes less power than in the operation mode.

[0033] When the power saving mode is set, the startup time of the CT device 2 can be set so that the power saving mode is ended and the device enters the operation mode. For example, when setting the CT device 2 to the power saving mode at the end of an examination at a hospital, the startup time of the CT device 2 can be set to 8:00 a.m. the following day. When setting the power saving mode, it is also possible to set a maintenance time for maintaining the power saving mode instead of the startup time of the CT device 2. In this case, the CT device 2 will start up after the maintenance time has elapsed.

[0034] Next, a configuration related to temperature adjustment of the detector panel 9 will be described. Fig. 2 is a diagram for explaining a configuration related to temperature adjustment of the detector panel. Fig. 2 is a diagram showing one detector module 9A constituting the detector panel 9 as viewed from the channel direction. As shown in Fig. 2, the detector module 9A constituting the detector panel 9 is attached to a polygon 20.

[0035] The detector module 9A includes a detection element 21 made of a semiconductor layer that detects radiation, and an ASIC (Application Specific Integrated Circuit) 22. The ASIC 22 is mounted on a readout board 23, and the readout board 23 is mounted on a detector holding plate 24 that holds the detector module 9A.

[0036] The polygon 20 is equipped with temperature sensors 25a, 25b, a heater 26, and a cooling fan 27. The temperature sensors 25a, 25b, the heater 26, and the cooling fan 27 are connected to a temperature adjustment device 10. The detector module 9A is mechanically and thermally coupled to the polygon 20. The temperature adjustment device 10 controls the temperature of the polygon 20 and further the detector panel 9, as will be described later. The heater 26 and the cooling fan 27 are an example of a temperature adjuster in the present disclosure.

[0037] Temperature sensor 25a measures the temperature of detector panel 9 and outputs information indicating the measured temperature to temperature adjustment device 10. Temperature sensor 25b measures the ambient temperature of detector panel 9 and outputs information indicating the measured temperature to temperature adjustment device 10. Temperature sensor 25b is preferably placed in a position where it can measure the intake or exhaust temperature of cooling fan 27.

[0038] The heater 26 is controlled by the temperature adjustment device 10 to heat the detector module 9A and increase its temperature. The heater 26 may be capable of being switched on and off, or may be controlled by the temperature adjustment device 10 to maintain a predetermined temperature.

[0039] The cooling fan 27 is disposed so as to blow air toward the detector holding plate 24 from the Y direction, and is driven and controlled by the temperature adjustment device 10 via a drive source (not shown) such as a motor. In this way, the cooling fan 27 cools the detector panel 9 via the detector holding plate 24, thereby lowering the temperature of the detector panel 9. The cooling fan 27 may be driven and controlled by the temperature adjustment device 10 so as to rotate at a constant number of revolutions, or may be driven and controlled by the temperature adjustment device 10 so that the number of revolutions can be changed so that the degree of cooling can be changed.

[0040] The polygon 20 and the detector holding plate 24 are made of a material with a relatively high thermal conductivity, such as aluminum, and the heat generated from the detector module 9A is dissipated into the gantry 4 from the polygon 20 and the detector holding plate 24 .

[0041] Next, a temperature adjustment device according to this embodiment will be described. First, the hardware configuration of the temperature adjustment device according to this embodiment will be described with reference to Fig. 3. As shown in Fig. 3, the temperature adjustment device 10 is made up of a computer and includes a CPU (Central Processing Unit) 11, non-volatile storage 13, memory 15 as a temporary storage area, and an I / F 17. The CPU 11, storage 13, memory 15, and I / F 17 are connected to a bus 18. The CPU 11 is an example of a processor in the present disclosure.

[0042] The storage 13 is realized by a hard disk drive (HDD), a solid state drive (SSD), a flash memory, etc. The storage 13 as a storage medium stores the temperature adjustment program 12 installed in the temperature adjustment device 10. The CPU 11 reads the temperature adjustment program 12 from the storage 13, loads it into the memory 15, and executes the loaded temperature adjustment program 12.

[0043] The I / F 17 communicates various types of information with the console 3 via wired or wireless communication. The I / F 17 is also connected via wires to the temperature sensors 25a and 25b, the heater 26, and the cooling fan 27, acquires information about the temperatures detected by the temperature sensors 25a and 25b, and outputs control signals for driving the heater 26 and the cooling fan 27.

[0044] The temperature adjustment program 12 is stored in a state accessible from the outside in a storage device of a server computer connected to a network or in network storage, and is downloaded and installed in response to a request into a computer constituting the temperature adjustment device 10. Alternatively, the program is recorded on a recording medium such as a DVD (Digital Versatile Disc) or a CD-ROM (Compact Disc Read Only Memory) and distributed, and is installed into a computer constituting the temperature adjustment device 10 from the recording medium via, for example, the console 3.

[0045] Next, the functional configuration of the temperature adjustment device according to this embodiment will be described. Fig. 4 is a diagram showing the functional configuration of the temperature adjustment device according to this embodiment. As shown in Fig. 4, the temperature adjustment device 10 includes an information acquisition unit 31, a setting unit 32, and a control unit 33. The CPU 11 executes the temperature adjustment program 12 to function as the information acquisition unit 31, the setting unit 32, and the control unit 33.

[0046] The information acquiring unit 31 receives instructions related to the temperature control of the detector panel 9, which are given by the operator from the console 3. For example, in this embodiment, the information acquiring unit 31 acquires instruction information from the console 3 to set the CT device 2 to power saving mode during operation mode, and information on the maintenance time for maintaining the CT device 2 in power saving mode. Here, when the operator inputs the maintenance time for the power saving mode from the console 3, the information acquiring unit 31 acquires the input maintenance time information as is. When the operator inputs the startup time for the CT device 2 from the console 3, the information acquiring unit 31 acquires the maintenance time information by deriving the time from the current time to the startup time as the maintenance time.

[0047] The setting unit 32 determines whether the maintenance time is equal to or greater than a threshold value Th1. The threshold value Th1 is, for example, 1 to 2 hours. If the maintenance time is equal to or greater than the threshold value Th1, the maintenance temperature of the detector panel 9 in the power saving mode is set according to the maintenance time. In this embodiment, the longer the maintenance time, the lower the maintenance temperature of the detector panel 9 is set. Here, in the operation mode in which the CT device 2 is activated, the temperature of the detector panel 9 is set to, for example, 45°C. Therefore, in this embodiment, the maintenance temperature of the detector panel 9 is set to a value lower than 45°C. For example, if the maintenance time is 4 hours, the setting unit 32 sets the maintenance temperature of the detector panel 9 to 10°C. In this case, the setting unit 32 sets the maintenance temperature to a temperature that is approximately 5°C lower every time the maintenance time is doubled. Here, the relationship between the maintenance time and the maintenance temperature may be experimentally determined according to the degree of deterioration of the detector panel 9 when the detector panel 9 is maintained at various maintenance temperatures for various maintenance times.

[0048] The control unit 33 controls the driving of the heater 26 and the cooling fan 27 to adjust the temperature of the detector panel 9 so that the detector panel 9 is at the holding temperature.

[0049] On the other hand, if the temperature change after the CT device 2 switches from the operation mode to the power saving mode is rapid, deterioration of the detector due to heat cycles will accelerate. For this reason, in this embodiment, the control unit 33 controls the driving of the heater 26 and the cooling fan 27 so that the temperature change after the CT device 2 switches from the operation mode to the power saving mode decreases by, for example, 10°C per 30 minutes. In this way, the control unit 33 adjusts the temperature of the detector panel 9 so that the temperature change is constant.

[0050] That is, the control unit 33 controls the driving of the heater 26 and the cooling fan 27 by turning on the heater 26 and turning off the cooling fan 27, or conversely, by turning off the heater 26 and turning on the cooling fan 27, so that the temperature change of the detector panel 9 is constant. In this case, if the heater 26 is adjustable to a predetermined temperature, the control unit 33 may adjust the temperature of the heater 26 to keep the temperature change constant. Also, if the rotation speed of the cooling fan 27 is changeable, the rotation speed of the cooling fan 27 may be changed to keep the temperature change constant.

[0051] Furthermore, if the imaging time is long or the environmental temperature is very high, the temperature of the detector panel 9 may be higher than in the operating mode when the CT device 2 switches from the operating mode to the power-saving mode. In this case, if the cooling fan 27 is driven to maintain the temperature of the detector panel 9 at the maintenance temperature after the CT device 2 switches from the operating mode to the power-saving mode, the temperature change will be rapid, resulting in accelerated deterioration of the detector due to heat cycles. Therefore, when the CT device 2 is set to the power-saving mode, if the temperature of the detector panel 9 is equal to or higher than the second threshold value Th2, the control unit 33 delays the start of processing to control the drive of the heater 26 and the cooling fan 27. Here, the temperature of the detector panel 9 in the operating mode is, for example, 45°C. The second threshold value Th2 is, for example, 50°C, which is 5°C higher than 45°C.

[0052] In this case, the control unit 33 delays the start of the process of controlling the drive of the heater 26 and the cooling fan 27 by stopping the drive of the cooling fan 27 until the temperature of the detector panel 9 is cooled to the temperature in the operation mode (i.e., 45°C). As a result, during the delay, the detector panel 9 is cooled naturally by heat dissipation to the environment via the polygon 20 and the detector holding plate 24. During this time, the temperature of the detector panel 9 is measured by the temperature sensor 25a. Then, after the temperature of the detector panel 9 is cooled to the temperature in the operation mode, the control unit 33 starts the process of controlling the drive of the heater 26 and the cooling fan 27, thereby adjusting the temperature of the detector panel 9 so that the temperature change is constant.

[0053] If the maintenance time is less than threshold value Th1, control unit 33 prohibits the process of controlling the driving of heater 26 and cooling fan 27. As a result, heater 26 and cooling fan 27 are not driven, and temperature adjustment device 10 does not perform the temperature adjustment process.

[0054] Next, the processing performed in this embodiment will be described. Fig. 5 is a flowchart showing the processing performed in this embodiment. The information acquisition unit 31 monitors whether an instruction to switch to the power saving mode has been issued (step ST1), and if step ST1 is positive, the information acquisition unit 31 acquires instruction information to set the power saving mode and information on the maintenance time for maintaining the CT device 2 in the power saving mode (information acquisition; step ST2).

[0055] Next, the setting unit 32 determines whether the maintenance time is equal to or greater than the first threshold value Th1 (step ST3). If the result of step ST3 is negative, the control unit 33 proceeds to the processing of step ST8 without driving the heater 26 and the cooling fan 27. If the result of step ST3 is positive, the setting unit 32 sets the maintenance temperature of the detector panel 9 in the power saving mode according to the maintenance time (step ST4).

[0056] Next, when the power saving mode is set, the control unit 33 determines whether the ambient temperature of the detector panel 9 is equal to or higher than the second threshold value Th2 (step ST5). If the result of step ST5 is negative, the control unit 33 controls the driving of the heater 26 and the cooling fan 27 so that the detector panel 9 maintains the holding temperature at a constant rate (step ST6).

[0057] On the other hand, if step ST5 is positive, the control unit 33 delays the start of the process of controlling the operation of the heater 26 and the cooling fan 27 until the temperature of the detector panel 9 reaches the temperature in the operational mode (processing start delay; step ST7), and proceeds to the process of step ST6.

[0058] Next, the control unit 33 determines whether the maintenance time has elapsed (step ST8), and if step ST8 is negative, the control unit 33 returns to step ST6 and repeats the processes of steps ST6 and ST8. If step ST8 is positive, the control unit 33 sets the heater 26 so that the temperature of the detector panel 9 becomes the temperature in the operation mode (step ST9), and ends the process.

[0059] As described above, in this embodiment, when the duration for which the power saving mode is maintained is equal to or longer than the predetermined first threshold value Th1, the maintenance temperature of the detector panel 9 in the power saving mode is set according to the maintenance time, and the heater 26 and the cooling fan 27 are controlled so that the detector panel 9 is at the maintenance temperature. This prevents the temperature of the detector panel 9 from becoming too low, thereby preventing deterioration of the detector panel 9 due to heat cycles.

[0060] Furthermore, after the power saving mode is set, the heater 26 and the cooling fan 27 are controlled to maintain the detector panel 9 at a constant temperature. This prevents the temperature from dropping suddenly, and more reliably prevents the detector panel 9 from deteriorating due to heat cycles.

[0061] Furthermore, when the power saving mode is set and the ambient temperature of the detector panel 9 is equal to or higher than a predetermined second threshold value Th2, the start of the process for controlling the driving of the heater 26 and the cooling fan 27 is delayed more than when the ambient temperature of the detector panel 9 is lower than the second threshold value Th2. This prevents the detector panel 9, which has been switched to and maintained in the power saving mode, from being suddenly cooled down from a high temperature state, and as a result, deterioration of the detector panel 9 due to heat cycles can be more reliably prevented.

[0062] In the above embodiment, the temperature sensor 25a is used to measure the temperature of the detector module 9A, but this is not limiting. The temperature of the entire detector panel 9 may be measured by a thermography camera or the like.

[0063] Furthermore, in the above embodiment, the heater 26 and the cooling fan 27 are provided on the polygon 20, but this is not limiting. The polygon 20 may be provided with only the heater 26. In this case, the detector panel 9 is cooled by dissipating heat to the environment via the polygon 20 and the detector holding plate 24.

[0064] Furthermore, in the above embodiment, the hardware structure of the temperature adjustment device 10 can use the various processors listed below. The various processors include a CPU, which is a general-purpose processor that executes software (programs) and functions as various processing units, as well as a PLD (Programmable Logic Device) such as an FPGA (Field-Programmable Gate Array) whose circuit configuration can be changed after manufacture, and a dedicated electrical circuit such as an ASIC, which is a processor with a circuit configuration designed specifically for executing specific processing.

[0065] The above-mentioned various processes may be executed by one of these various processors, or may be executed by a combination of two or more processors of the same or different types (for example, a plurality of FPGAs, or a combination of a CPU and an FPGA). Also, a plurality of processing units may be configured by a single processor. An example of configuring a plurality of processing units by a single processor is a form in which a processor is used that realizes the functions of an entire system including a plurality of processing units by a single IC (Integrated Circuit) chip, such as an SoC (System on a Chip).

[0066] The following are appendices to the present disclosure. (Additional note 1) A temperature adjustment device for a radiographic imaging apparatus including a detector that detects radiation emitted from a radiation source and transmitted through a subject, and a temperature adjuster that adjusts the temperature of the detector, a processor; The processor: acquire instruction information for setting the radiation imaging apparatus to a power saving mode in which power consumption is lower than that during operation, and information on a duration for which the power saving mode is to be maintained; If the maintenance time is equal to or greater than a predetermined first threshold value, a maintenance temperature of the detector in the power saving mode is set according to the maintenance time; a temperature adjusting device that controls the operation of the temperature adjuster so that the detector reaches the holding temperature; (Additional note 2) The temperature adjustment device according to claim 1, wherein the processor controls the operation of the temperature adjuster so that the detector reaches the holding temperature at a constant rate after the power saving mode is set. (Additional note 3) The temperature adjustment device described in appendix 1 or 2, wherein when the processor is set to the power saving mode, if the ambient temperature of the detector is equal to or higher than a predetermined second threshold, the processor delays the start of the process for controlling the operation of the temperature adjuster compared to when the ambient temperature of the detector is less than the second threshold. (Additional note 4) A temperature adjustment device described in any one of appendix 1 to 3, wherein the processor prohibits processing to control the operation of the temperature adjuster so that the detector reaches the holding temperature when the maintenance time is less than the first threshold value. (Additional note 5) a detector that detects radiation emitted from the radiation source and transmitted through the subject; a temperature regulator for adjusting the temperature of the detector; A radiographic imaging apparatus comprising the temperature adjustment device according to any one of appended items 1 to 4. (Additional note 6) 6. The radiation imaging apparatus according to claim 5, wherein the detector is a photon counting detector that outputs a detection signal corresponding to the photon energy of the radiation. (Additional note 7) 7. The radiation imaging apparatus according to claim 5, wherein the temperature adjustment device includes a heater. (Additional note 8) 8. The radiographic imaging apparatus according to any one of claims 5 to 7, wherein the temperature adjustment device includes a cooling fan. (Additional note 9) A temperature adjustment method for a radiographic imaging apparatus including a detector that detects radiation emitted from a radiation source and transmitted through a subject, and a temperature adjuster that adjusts the temperature of the detector, comprising: a computer acquires instruction information for setting the radiation imaging apparatus to a power saving mode in which power consumption is lower than that during operation, and information on a duration for which the power saving mode is to be maintained; If the maintenance time is equal to or greater than a predetermined first threshold value, a maintenance temperature of the detector in the power saving mode is set according to the maintenance time; A temperature adjustment method for controlling the operation of the temperature adjuster so that the detector reaches the holding temperature. (Additional note 10) 1. A temperature adjustment program for a radiation imaging apparatus including a detector that detects radiation emitted from a radiation source and transmitted through a subject, and a temperature adjuster that adjusts the temperature of the detector, a step of acquiring instruction information for setting the radiation imaging apparatus to a power saving mode in which power consumption is lower than that during normal operation, and information on a duration for which the power saving mode is to be maintained; If the maintenance time is equal to or greater than a predetermined first threshold value, setting a maintenance temperature of the detector in the power saving mode in accordance with the maintenance time; and a temperature adjustment program that causes a computer to execute a procedure for controlling the operation of the temperature adjuster so that the temperature of the detector is at the holding temperature. [Explanation of symbols]

[0067] 1 Medical imaging system 2 CT device 3 Console 4 Gantry 4A opening 4B Rotating Plate 5 Radiation source 6 Radiation tube 7 Bowtie Filter 8 berths 9 Detector Panel 9A Detector Module 10 Temperature adjustment device 11 CPU 12 Temperature Control Program 13. Storage 15 memory 17 Interfaces 18 Bus 20 polygons 21 Detector element 22 ASIC 23 Readout board 24 Detector holding plate 25a temperature sensor 25b Temperature sensor 26 Heater 27 Cooling fan 31 Information Acquisition Department 32 Setting section 33 Control Unit H Subject

Claims

1. A temperature adjustment device for a radiographic imaging apparatus including a detector that detects radiation emitted from a radiation source and transmitted through a subject, and a temperature adjuster that adjusts the temperature of the detector, a processor; The processor: acquire instruction information for setting the radiation imaging apparatus to a power saving mode in which power consumption is lower than that during operation, and information on a duration for which the power saving mode is to be maintained; If the maintenance time is equal to or greater than a predetermined first threshold value, a maintenance temperature of the detector in the power saving mode is set in accordance with the maintenance time; a temperature adjusting device that controls the operation of the temperature adjuster so that the detector reaches the holding temperature;

2. The temperature adjustment device according to claim 1 , wherein the processor controls the operation of the temperature adjuster so that the temperature of the detector reaches the holding temperature at a constant rate after the power saving mode is set.

3. The temperature control device of claim 1 or 2, wherein when the processor is set to the power saving mode, if the ambient temperature of the detector is equal to or higher than a predetermined second threshold, the processor delays the start of the process for controlling the operation of the temperature regulator more than when the ambient temperature of the detector is less than the second threshold.

4. The temperature adjustment device according to claim 1 , wherein the processor inhibits a process of controlling the operation of the temperature adjuster so that the detector is at the holding temperature when the maintenance time is less than the first threshold value.

5. a detector that detects radiation emitted from the radiation source and transmitted through the subject; a temperature regulator for adjusting the temperature of the detector; A radiographic imaging apparatus comprising the temperature adjustment device according to claim 1.

6. 6. The radiographic imaging apparatus according to claim 5, wherein the detector is a photon counting detector that outputs a detection signal corresponding to the photon energy of the radiation.

7. The radiographic imaging apparatus according to claim 5 , wherein the temperature adjustment device includes a heater.

8. The radiographic imaging apparatus according to claim 5 , wherein the temperature adjustment device includes a cooling fan.

9. A temperature adjustment method for a radiographic imaging apparatus including a detector that detects radiation emitted from a radiation source and transmitted through a subject, and a temperature adjuster that adjusts the temperature of the detector, comprising: a computer acquires instruction information for setting the radiation imaging apparatus to a power saving mode in which power consumption is lower than that during operation, and information on a duration for which the power saving mode is to be maintained; If the maintenance time is equal to or greater than a predetermined first threshold value, a maintenance temperature of the detector in the power saving mode is set in accordance with the maintenance time; A temperature adjustment method for controlling the operation of the temperature adjuster so that the detector reaches the holding temperature.

10. 1. A temperature adjustment program for a radiation imaging apparatus including a detector that detects radiation emitted from a radiation source and transmitted through a subject, and a temperature adjuster that adjusts the temperature of the detector, a step of acquiring instruction information for setting the radiation imaging apparatus to a power saving mode in which power consumption is lower than that during normal operation, and information on a duration for which the power saving mode is to be maintained; If the maintenance time is equal to or greater than a predetermined first threshold value, setting a maintenance temperature of the detector in the power saving mode in accordance with the maintenance time; and a temperature adjustment program that causes a computer to execute a procedure for controlling the operation of the temperature adjuster so that the temperature of the detector is at the holding temperature.

Images