JP2008206618A - Apparatus for storing semiconductor two-dimensional x-ray detector and x-ray radiography equipment provided with the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus for storing a semiconductor two-dimensional X-ray detector, controlling a temperature during an operation and storage within an allowable range without causing dew condensation no matter what operation temperature environment and storage temperature environment the semiconductor two-dimensional X-ray detector is in and acquiring a desired photographed image, and X-ray radiography equipment provided with the apparatus. <P>SOLUTION: The apparatus controls the temperature when storing the semiconductor two-dimensional X-ray detector FPD (flat panel detector) 17 to be within a temperature range for guaranteeing characteristics during the storage by using a Peltier element 24, is provided with a storage part 20 for storing the FPD, and has a DC power source for supplying a DC current for making the Peltier element generate cooling and heating calories, a heat sink 25 for radiating the calories, a storage part temperature detector 26 for detecting the temperature of the storage part for the FPD and an outdoor air temperature detector 27 for detecting an outdoor air temperature. Control signals for controlling the FPD to the storage temperature are generated on the basis of the detected storage part temperature value and outdoor air temperature value and the value of the storage temperature range of the FPD, the flowing direction of the DC current is controlled by the control signals, and the temperature of the storage part for the FPD is controlled to be the storage temperature range. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a storage device for a semiconductor two-dimensional X-ray detector for X-ray imaging, and more particularly to characteristics of the semiconductor two-dimensional X-ray detector during storage in an X-ray imaging device that is mounted on a car and performs X-ray imaging. The present invention relates to a technology for controlling the guaranteed storage temperature range.

  In recent years, X-ray diagnostic imaging apparatuses have been digitized. The cause is a two-dimensional X-ray detector using a semiconductor that can convert X-rays directly into digital electrical signals from an image intensifier whose X-ray image detection medium is an X-ray film or analog optical image. This is because an X-ray flat panel detector (hereinafter referred to as FPD) is being replaced.

On the other hand, the X-ray detector of the digital X-ray system including the FPD has an operating temperature for guaranteeing the characteristics during operation and a storage temperature for guaranteeing the characteristics during storage. It must be photographed and stored so that condensation does not occur in the environment.
Therefore, there is a technique disclosed in Patent Document 1 as a means for solving this problem.

  In the technique disclosed in Patent Document 1, a heat insulating member that holds the temperature inside the storage part is provided in the storage part that stores the FPD, and the temperature inside the storage part is maintained. In addition, a moisture-absorbing desiccant that absorbs moisture in the atmosphere is provided inside the storage unit to prevent moisture in the atmosphere from entering the storage unit, and condensation occurs inside the storage unit. In addition, even if the heater is provided with a heater so that the internal temperature of the storage unit becomes a predetermined temperature, the heater may be stored or used in low temperature conditions such as cold districts and winter. The internal temperature of the storage unit is set to a desired temperature.

JP 2005-227709 JP

  However, in the technique of Patent Document 1, since the temperature of the housing part of the semiconductor two-dimensional X-ray detector is maintained only by the heat insulating member, the temperature is low in a high temperature environment, a cold region, a winter season, or the like. Under the condition environment, there was an unsolved problem that it was difficult to maintain the characteristic guaranteed temperature range during storage with only the heat insulating member.

  The present invention has been made in view of the above problems, and the operating and storage temperature is within an allowable range without causing condensation regardless of the operating temperature environment and storage temperature environment of the FPD. It is an object of the present invention to provide a storage device for a semiconductor two-dimensional X-ray detector that can be controlled to acquire a desired captured image, and an X-ray imaging device including the storage device.

  A storage device for a semiconductor two-dimensional X-ray detector and an X-ray imaging apparatus provided with the same according to the present invention are controlled using a Peltier element within a temperature range that guarantees the storage characteristics of the semiconductor two-dimensional X-ray detector. Therefore, the above object can be achieved by the following means.

  That is, a semiconductor two-dimensional X-ray detector having a storage unit for storing the semiconductor two-dimensional X-ray detector, and a storage temperature control means for controlling the temperature at the time of storage of the semiconductor two-dimensional X-ray detector by the storage unit The storage temperature control means includes a temperature control means using a Peltier element, and the temperature control means using the Peltier element is for generating a heat amount of cooling and heating in the Peltier element and the Peltier element. DC power supply for supplying a direct current, heat radiating means for radiating the amount of heat, storage temperature control signal generating means for generating a control signal for controlling the storage temperature of the semiconductor two-dimensional X-ray detector, This is achieved by comprising current direction control means for controlling the direction in which the direct current flows in accordance with a storage temperature control signal.

  Further, a photographing mechanism using the flat panel detector is mounted on a car, and the DC power is supplied from a generator, a battery or an external power source mounted on the car to keep the flat panel detector at a storage temperature. A storage medical temperature control direct current power conversion means for converting to a sufficient direct current voltage is provided to constitute a mobile examination X-ray imaging apparatus, and the storage temperature control direct current power conversion means includes the generator, battery or external power supply. Based on the type signal, the generator, battery or external power source is converted to the DC power source to constitute the DC power source.

  According to the present invention, a semiconductor capable of obtaining a desired photographed image by controlling the temperature during operation and storage within an allowable range without causing condensation regardless of the operating temperature environment and storage temperature environment of the FPD. A storage device for a two-dimensional X-ray detector and an X-ray imaging apparatus including the storage device can be provided.

An example in which the FPD storage apparatus according to the present invention is mounted on an X-ray examination vehicle will be described in detail below with reference to the accompanying drawings.
FIG. 1 is a diagram showing an overall configuration of an X-ray imaging system in which an FPD storage device and an X-ray imaging device of the present invention are mounted on a chest examination car.

  In FIG. 1, an image processing apparatus 3 that processes image data and image information obtained by an imaging unit 2 using an FPD, and image data processed by the image processing apparatus 3 are provided in the imaging room 11 of the vehicle 1. And a recording device 4 for recording image information.

  The image processing device 3 is installed on the upper surface of the table 5 and connected to a controller 7 connected to the photographing unit 2 using the FPD via a cable 6. Similarly, the image processing apparatus 3 is connected to the recording apparatus 4 via the cable 6. Then, after the image data and image information are processed by the image processing device 3, the recording device 4 stores the image data and image information on a recording medium (not shown) (e.g., CD disc, DVD disc), The recording medium on which the image data and the image information are recorded can be taken out of the vehicle 1. Further, an FPD storage device 10 for storing the FPD when the FPD is removed from the photographing unit 2 supported by the support column 9 is disposed on the floor surface 8 of the vehicle 1. An operation unit 13 for operating the X-ray imaging system and a display unit 14 (display unit) for displaying and controlling captured images (display control unit) are arranged.

  An X-ray tube that generates X-rays, an X-ray generator using an X-ray diaphragm device that limits the irradiation range of X-rays, and an X-ray high voltage that controls the X-rays by applying a high voltage to the X-ray tube The device is omitted.

  In addition, a generator and a battery are mounted in the car, but these are also omitted.

  In the X-ray imaging system for screening having such a configuration, when performing a screening by moving to a group screening site, an FPD is taken out from the FPD storage device 10 (storage device for a semiconductor two-dimensional X-ray detector) and an imaging unit is used. 2 is set, and the operator operates the operation device 13 arranged in the operation room to perform shooting. The captured image data is read from the FPD under the control of the controller 7 and input to the image processing apparatus 3, and the necessary image processing is performed to form a captured image. The captured image includes patient information. Various information is attached and recorded in the recording device 4. Of course, in this case, a photographed image can be displayed and confirmed on the display device 14 to prevent a photographing mistake.

  When the examination of all the subjects is completed and the examination is completed, the FPD is pulled out from the imaging unit 2 and stored in the FPD storage device 10, and the examination vehicle is moved and stored in a garage or the like.

  Next, the imaging unit using the FPD in the X-ray imaging system having the above-described configuration and the FPD storage device 10 that is a main part of the present invention for storing and storing the FPD other than during imaging will be described in detail.

  In recent years, portable FPDs that can be hand-carried have been developed and used clinically. In particular, when mounted in a car as shown in FIG. 1, when the portable FPD is not used for photographing, only the portable FPD is taken out from the photographing unit 2 and stored in the FPD storage device 10 for storage.

FIG. 2 is a detailed view of the photographing unit 2 using the portable FPD.
This imaging unit 2 includes an FPD storage case 15 for storing FPD during shooting, a grid 16 for removing scattered radiation, a portable FPD 17 for recording captured images, and a lead plate for preventing backward X-ray scattering 18 and a handle 19 (storage and removal means) for pulling out the FPD.

  In the photographing unit 2 having such a configuration, at the time of photographing, the FPD 17 is pulled out from the FPD storage device 10 using the handle 19 and set to the photographing unit 2, and after the photographing is finished, the FPD 17 is pulled out from the photographing unit 2 and the FPD And stored in the FPD storage device 10 under the storage temperature environment (storage unit of the semiconductor two-dimensional X-ray detector).

FIG. 3 is a block diagram of the FPD storage device 10 according to the present invention.
The FPD storage device 10 includes a portable FPD handle 19 (storage and removal means) to be taken out from the FPD storage case 15 at the time of shooting of the shooting unit 2, and the FPD storage case 15 from the FPD storage case 15 by using the handle 19 FPD storage / storage unit 20 that stores and stores the taken-out FPD in the FPD storage unit, a vacuum layer or heat insulating member 21 for maintaining the FPD at the temperature during storage, and absorbs vibration during vehicle movement The vibration absorbing member 22 (vibration absorbing means), the aluminum or copper plate 23 (vibration absorber holding means) for holding the vibration member, and the FPD 17 is cooled and heated via the aluminum or copper plate 23, and the FPD 17 A Peltier element 24 for maintaining the storage temperature, a heat sink 25 for dissipating heat generated by the Peltier element 24, and a storage unit temperature detector 26 (storage unit temperature) for detecting the temperature inside the FPD storage storage unit 20. Detection means) and the FPD storage device 10 An outside air temperature detector 27 (outside air temperature detecting means) for detecting the air temperature (inside temperature), and a temperature control unit (including a DC power source of the Peltier element 24) for controlling the temperature inside the FPD storage / storage unit 28 (Temperature control means), a power cable 29 connected to a power source described later to the temperature control unit 28, a power supply type signal cable 30 for transmitting the type of power supply to the temperature control unit 28, and the outside air temperature (inside temperature) And an alarm display unit 31 (notification means) for detecting that the temperature difference between the FPD storage device 10 and the inside of the FPD storage device 10 is large and notifying the operator.

  The means for dissipating the heat generated by the Peltier element 24 can be changed to the heat sink 25 and a blower fan can be used, or both the heat sink and the blower fan can be used, depending on the temperature control capability. Just choose.

  That is, the heat dissipation means uses a heat sink and / or a blower fan.

  In the FPD storage device 10 having such a configuration, the portable FPD 17 is removed from the FPD storage case 15 at the time of shooting using the handle 19 and stored in the FPD storage and storage unit 20 of the FPD storage device 10 after the shooting is finished. Is fixed inside the FPD storage / storage unit 20 by the vibration absorbing member 22 and the aluminum or copper plate 23.

  The inside of the FPD storage / storage unit 20 is thermally insulated by a vacuum layer or a heat insulating material 21, and a Peltier element 24 is provided to cool and heat the inside, and an aluminum or copper plate 23 is used as the internal surface member. Thus, the internal temperature is controlled.

  The Peltier element 24 includes a heat sink 25 and / or a blower fan (not shown) to improve the efficiency of heat exchange with the outside air. The storage unit temperature detector 26 and the outside air temperature detector 27 store the FPD. The temperature inside the storage unit 20 and the outside air temperature are detected, and power is supplied from a power source described later via a power cable 29 so that the inside temperature falls within a predetermined range. Controls the current supplied to 24.

  When the power supplied via the power cable 29 is supplied from a generator with a car engine running or supplied from a battery charged by the generator, the internal temperature of the FPD storage device 10 Since there are various supply forms such as when supplied from a battery mounted for maintenance, when supplied from the outside of the car, for example, from an external cable, etc., the temperature control unit 28 is It must be compatible with the power supply mode.

  Therefore, a power type signal for determining the power supply form by the power type signal cable 30 is transmitted to the temperature control unit 28, and the temperature inside the FPD storage device 10 is set to a predetermined level corresponding to the type of the power source. A direct current power source for supplying direct current to the Peltier element for controlling within the range is configured.

FIG. 4 is a block diagram showing an example of supplying power to the FPD storage device 10. As shown in FIG.
In FIG. 4, there are cases where power is supplied from a power generator 32 of a car generator, a battery 33 for the FPD storage device 10, and an external power source 34 as power, and power from these power sources is switched to a power source switching unit 35. To enter.

  The power supply switching unit 35 is switched to the corresponding power supply by the power supply switching signal selected by the power supply switching switch 36, and supplies the switched power supply to the FPD storage device 10 through the power cable 29.

  The storage battery 33 of the FPD 17 is also supplied with power from a power source 32 by the car generator to charge the battery.

  Further, the power supply switching signal selected by the power supply switching switch 36 is also input to the FPD storage device 10 through the power type signal cable 30.

Next, switching examples of various power sources will be described with reference to FIG.
First, while the examination car is stored in the garage etc., it is supplied by the battery 33,
In the morning, when the car engine is turned on, power is supplied while being charged from the generator 32 to the battery 33. In this case, since the discharge is performed while charging, sufficient power supply is possible.

  At the examination site, the portable FPD 17 is taken out from the FPD storage device 10 and set in the FPD storage case 15 at the time of imaging to perform X-ray imaging, and the portable FPD 17 is stored again in the FPD storage case 10 after completion of the examination.

  Then, while returning to a car storage location (such as a garage), electric power is supplied from the battery 33 while being charged from the generator 32, and electric power is supplied from the battery 33 when it arrives at the garage and the engine stops.

  Depending on the storage location of the vehicle, the external power supply 34 may be able to supply power. When the external power supply 34 is a commercial power supply, a means for converting the commercial AC power supply into a DC power supply may be provided.

Next, temperature control during storage of the FPD 17 stored in the FPD storage device 10 will be described.
The temperature during storage of the FPD needs to be controlled according to the form of the power source connected to the FPD storage device 10 as described above. In other words, <1> When the examination car is stored in the garage or the like and supplied with the battery 33, <2> When supplied with the battery 33 being charged from the generator 32 when the car engine is started in the morning <3> This is a case where the external power supply 34 is used.

(1) When the examination car is stored in a garage or the like and supplied from the battery 33 The temperature in this case needs to be controlled as shown in FIG.

  In FIG. 5, 40 is a change in the outside air temperature (inside temperature), 41 is a change in the temperature of the FPD storage and storage unit 20, 42 to 45 are temperature conditions determined for the portable FPD 17, and 42 is a maximum temperature (sth ), 43 is the minimum temperature (stl) during storage, 44 is the maximum temperature (oph) during operation, and 45 is the minimum temperature (opl) during operation.

  When the portable FPD 17 is stored, in order to maintain the characteristics of the portable FPD 17, the internal temperature of the FPD storage / storage unit 20 is between the maximum temperature (sth) 42 during storage and the minimum temperature (stl) 43 during storage. What is necessary is just to control temperature.

  In this case, since the temperature control power is supplied from the battery 33, it must be controlled to minimize power consumption.

  Therefore, the internal temperature detected by the storage unit temperature detector 26 and the external temperature detected by the outside air temperature detector 27 that the temperature inside the FPD storage storage unit 20 has approached the maximum temperature (sth) 42 during storage. Temperature is input to the temperature control unit 28, the current flowing through the Peltier element 24 is controlled by the temperature control unit 28 to cool the FPD storage and storage unit 20, and the outside air temperature 40 is the maximum during storage. While the temperature (sth) 42 is exceeded, the temperature in the FPD storage / storage unit 20 is controlled so as to be lower than that.

  When the outside air temperature 40 falls below the maximum storage temperature (sth) 42, the cooling by the Peltier element 24 is stopped, and when the outside air temperature 40 falls below the minimum storage temperature (stl) 43, this time the Peltier Heating is performed using the element 24, and the temperature is controlled to be equal to or higher than the minimum temperature (stl) 43 during storage.

  In this way, cooling and heating are controlled by the Peltier element 24 while monitoring fluctuations in the outside air temperature 40, and the outside air temperature 40 is between the maximum temperature (sth) 42 during storage and the minimum temperature (stl) 43 during storage. In this case, since heating and cooling are not performed, the temperature of the FPD storage / storage unit 20 changes very slowly, and the temperature stress applied to the FPD 17 can be reduced. In addition, since heating and cooling are not performed, the power supplied from the battery 33 is also the minimum necessary, and power consumption can be minimized.

(2) When the battery 33 is supplied while being charged from the generator 32 In the morning, the engine is running and the battery 33 is charged from the generator 32, and the storage temperature is controlled as shown in FIG. It ’s fine.

  In this case, the outside air of the FPD storage device 10 is between the maximum temperature (oph) 44 during operation of the portable FPD 17 and the minimum temperature (opl) 45 during operation due to the operation of the air conditioner in the vehicle so that the inspection can be started immediately. The temperature (in-vehicle temperature) is controlled.

  As described above, since the outdoor temperature 40 is between the maximum operating temperature (oph) 44 of the portable FPD 17 and the minimum operating temperature (opl) 45, the FPD 17 can be moved from the FPD storage device 10 to the photographing unit 2 at any time. Therefore, it is necessary to always operate the Peltier element 24 to slightly increase the internal temperature from the outside air temperature to suppress dew condensation. It is sufficient that the electric power for controlling the dew condensation is supplied while being charged from the generator 32 to the battery 33.

  The power switch signal selected by the power switch 36 is also input to the FPD storage device 10 through the power type signal cable 30.

  The switching of the power mode is performed by a switching signal of the power switching switch 36 input to the power switching unit 35.

  In this case, the temperature control using the battery 33 in (1) above is switched to a mode in which the car engine is started and the battery 33 is charged from the generator 32, that is, the engine is turned on in the morning. In the temperature control after switching when operating, the temperature of each part changes as shown in FIG.

  In FIG. 7, due to the operation of the air conditioner in the vehicle, the outside air temperature 40 exceeding the maximum temperature (sth) 42 during storage suddenly ranges from the operating temperature range (maximum temperature (oph) 44 during operation to the minimum temperature during operation (oph) opl) down to 45}.

  In this case, if the Peltier element 24 is not used for sufficient cooling, the internal temperature of the FPD storage / storage unit 20 gradually decreases as shown at 41, and no condensation occurs if it enters the operating temperature range.

  However, as described above, when the portable FPD 17 is taken out from the FPD storage device 10 and moved to the photographing unit 2 under a situation where the outside air temperature 40 suddenly drops to the operating temperature range 44 to 45 {, the portable FPD 17 Since the temperature is higher than the outside air temperature, the temperature of the portable FPD 17 rapidly changes to the outside air temperature.

  In this case, in order to obtain a stable image with good image quality, it is important to minimize the temperature change even in the FPD operating temperature range, and temperature control in which the temperature changes rapidly is not preferable. Therefore, even when the engine is running, even if the maximum operating temperature is exceeded, the internal temperature of the FPD storage device 10 rapidly follows the change in the outside air temperature as indicated by 46 in FIG. It is necessary to control the internal temperature to be a predetermined temperature at the time of entering.

  Further, even if the temperature is within the operating temperature range, if the difference between the outside temperature and the internal temperature is large, there is a possibility that a good image cannot be obtained as described above.

  Therefore, an alarm 31 (see FIG. 3) is provided to inform the operator of the above situation, and it is slowly lowered to the operating temperature range as shown in 41 of FIG. To start shooting. In addition, the alarm 31 is in a situation where the temperature control by the Peltier element 24 cannot be followed due to an excessively rapid change in the outside air temperature, that is, the internal temperature is lower than the outside air temperature, and the portable FPD 17 is taken out from the FPD storage device 10. Also used when there is a risk of condensation.

  In this way, the alarm 31 can be used to notify the operator of the temperature status of the portable FPD 17 inside the FPD storage device 10, so that the operator can take out and operate it from the storage case in response to the alarm. It becomes possible to acquire an image of image quality.

As described above, there are three modes in the temperature control: the cooling mode, the heating mode, and the leaving mode.
(1) Cooling mode In this mode, the outside temperature (the temperature inside the vehicle at the output of the outside temperature detector 27) is equal to or higher than the internal temperature of the FPD storage / storage unit 20 of the FPD storage device 10 (the output of the storage unit temperature detector 26). In this case, when the inside of the FPD storage / storage unit 20 is cooled so that the maximum temperature (sth) 42 during storage of the FPD is lower, a direct current is passed through the Peltier element 24 in the cooling direction.
(2) Heating mode In this mode, the outside air temperature (the output of the outside temperature detector 27) is lower than the internal temperature of the FPD storage / storage unit 20 (the output of the storage unit temperature detector 26), and it is the lowest when the FPD is stored. In the case where the inside of the FPD storage / storage unit 20 is heated so that the temperature (stl) is 43 or more, a direct current is supplied to the Peltier element 24 in a heating direction (a direction opposite to the cooling mode).
(3) Leaving mode This mode is used when the outside air temperature (output of the outside air temperature detector 27) is within the range of the maximum temperature (sth) 42 and the minimum temperature (stl) 43 when the FPD is stored. Does not pass current.

  FIG. 8 shows the temperature inside the FPD storage and storage unit so that the storage temperature of the FPD falls within the maximum temperature (sth) 42 and minimum temperature (stl) 43 during storage corresponding to the temperature control mode. 3 is a block diagram illustrating an example of a configuration of a temperature control unit 28 to be controlled. FIG.

  The temperature control unit 28 in FIG. 8 includes a DC power supply unit 28a that supplies a direct current for generating heat for cooling and heating to the Peltier element, and a control signal for controlling the temperature of the FPD to the storage temperature. A control unit 28b for generating a storage temperature control signal (storage temperature control signal generation means) to be generated and a current direction control signal (current direction control means) for controlling the direction in which the direct current flows by the storage temperature control signal; And an FPD storage temperature setting unit 28c corresponding to the FPD storage temperature.

  The FPD storage temperature setting value set by the storage temperature setting unit 28c is set by the operation unit 13 corresponding to the type of FPD, and this setting value is input to the storage temperature setting unit 28c via the controller 7. Set.

  The DC power supply unit 28a determines one of the generator, battery, and external power source determined by the power source switching unit 35 via the power cable 29, and the power source type signal cable 30 based on the power source type signal cable 30. A DC power source for the Peltier element 24 is provided with a power converter (not shown) for converting the power source into a DC power source for the Peltier element from the power source type signal to be used.

  As shown in FIG. 9, the DC power supply unit 28a includes a DC power supply 28a1, a changeover switch 28a2 for changing the direction of a current flowing through the Peltier element 24, and a changeover switch 28a3 (first current direction switching means). The changeover switch 28a2 and the changeover switch 28a3 connect the changeover common terminal a of the changeover switch 28a2 to the changeover terminal b during cooling by the current direction changeover signal generated by the control unit 28b, and The switching common terminal a ′ of 28a3 is connected to the switching terminal b ′ to cool by flowing current in the direction of <1> in the figure, and during heating, the switching common terminal a of the changeover switch 28a2 is connected to the switching terminal c. Then, the switching common terminal a ′ of the changeover switch 28a3 is connected to the switching terminal c ′, and heating is performed by flowing a current in the direction of <2> in the figure.

  In the case of the neglected mode, neither the changeover switch 28a2 nor the changeover switch 28a3 performs the changeover operation, and no current flows through the Peltier element 24.

  If it is necessary to finely control the direct current in the cooling, heating and leaving modes, a DC-DC converter 28a4 for controlling the voltage of the direct-current power supply 28a1, for example, a chopper circuit is provided as shown in FIG. The current supplied to the Peltier element 24 may be controlled by the voltage control signal 28a5 from the control unit 28b (current control means).

  FIG. 11 shows a DC power supply unit 28a according to another embodiment. This DC power supply has two DC power supplies 28aa and 28ab having different polarities, and the current direction control means is a changeover switch 28a6 (second current direction switching means). ) To switch the one DC power supply 28aa (common terminal d connected to switching terminal e) and the other DC power supply 28ab (common terminal d connected to switching terminal f) to supply the direction of DC current supplied to the Peltier element Switch between forward and reverse.

  According to the present embodiment, a desired photographed image can be acquired by controlling the temperature during operation and storage within an allowable range without causing condensation regardless of the operating temperature environment and storage temperature environment of the FPD. A storage device for a semiconductor two-dimensional X-ray detector and an X-ray imaging device including the storage device can be provided.

  As a result, when the X-ray imaging apparatus is mounted on a car for examination, the power consumption of the DC power supplied from the battery to the DC current supplied to the Peltier element is minimized, and the generator is driven by the engine. When is operated, the temperature control can be quickly performed to minimize the time until photographing is possible, so that the photographing throughput can be improved.

  Even if the DC power supply unit 28a is configured in this manner, the direction of the current supplied to the Peltier element 24 can be switched as in FIG.

  Furthermore, by providing each of the two DC power supplies 28aa and 28ab with the DC-DC converter of FIG. 10, the DC current in the cooling and heating modes can be controlled more finely as in FIG.

  When the DC voltage supplied from the battery is the same as the voltage of the DC power supply 28a, the DC power supply 28a1 in FIGS. 9 and 10 may be the battery. In the case of the DC power supply 28a in FIG. The direct current power supply 28aa may be the battery, and the direct current power supply 28ab may be added.

  The control unit 28b includes a temperature set value set by the FPD storage temperature setting unit 28c {storage temperature range corresponding to the maximum temperature (sth) 42 and the minimum temperature (stl) 43 during storage of the FPD}, and an FPD storage storage unit Based on the temperature detected by the 20 internal temperature detectors 26 and the outside air temperature (inside temperature) detected by the outside air temperature detector 27, each mode signal of cooling, heating, and leaving is generated, and the switching is performed by this mode signal. Switching control of the switch 28a2 and the changeover switch 28a3 is performed.

  In the temperature control, when the FPD 17 is moved from the FPD storage device 10 to the imaging unit 2 and immediately takes an image, the storage temperature control signal further increases the storage temperature of the FPD slightly higher than the outside air temperature. The signals are added (control signal adding means), and the temperature of the storage unit is controlled by the added signals so that no condensation occurs.

  Further, the FPD may be a setting means in which the temperature setting value set by the FPD storage temperature setting unit 28c changes gradually in order to minimize the temperature change and achieve a stable image quality even in the operating temperature range.

  Further, the control unit 28b determines that the difference between the outside air temperature and the internal temperature of the storage unit is large even if the temperature of the FPD is within an operating temperature range that guarantees the operation of the FPD (temperature difference determination means). Then, the alarm 31 (notification means) is activated by this determination signal to notify the operator, so that a good image can be obtained by taking out and taking a picture from the storage case after the temperature difference reaches a predetermined range. be able to.

  Further, the control unit 28b determines that the temperature control by the Peltier element 24 cannot be followed due to an excessively rapid change in the outside air temperature (temperature control follow-up determination means), and activates the alarm 31 with this determination signal ( By notifying the operator with the notification operating means), it is possible to prevent condensation that occurs when the portable FPD 17 is taken out from the FPD storage device 10.

  As described above, the current flowing through the Peltier element 24 can be controlled so that the storage temperature of the FPD falls within the range between the maximum temperature (sth) 42 and the minimum temperature (stl) 43 during storage of the FPD.

  The temperature control by the control unit 28b is performed by software using, for example, a microcomputer, whereby hardware can be easily configured.

  As described above, the storage device for the semiconductor two-dimensional X-ray detector according to the present embodiment has been described by taking the X-ray imaging system in which the X-ray imaging apparatus is mounted on the vehicle and performs the mass examination of the chest as an example. The present invention is not limited to the embodiment, and can be applied to an X-ray imaging apparatus including a storage device for storing the FPD without departing from the gist of the present invention.

  Furthermore, when applied to an X-ray imaging apparatus that performs display control (display control means) and displays (display means) the image captured on the FPD and the incidental information of the image, the captured image is confirmed and diagnosed on the spot. In addition, since re-shooting can be prevented, shooting efficiency can be improved.

The figure which shows the whole structure of the X-ray imaging system which mounts the storage apparatus of the semiconductor two-dimensional X-ray detector of this invention, and an X-ray imaging apparatus using the same in the chest examination car. Detailed view of the shooting unit using the portable flat panel detector FPD. The block diagram of the FPD storage apparatus by this invention. The block diagram which shows the example which supplies a power supply to the FPD storage apparatus by this invention. The figure which shows the relationship between time and temperature in case a medical examination car is stored in a garage etc. and electric power is supplied from the battery to the FPD storage apparatus by this invention. The figure which shows the relationship between time and temperature in case electric power is supplied, charging a battery from a generator. The figure which shows the relationship between time and temperature in case electric power is supplied, charging a battery from a generator. The block diagram which shows the structure of the temperature control part which controls the storage temperature of FPD. The block diagram which shows the structure of the direct-current power supply part in a temperature control part. The block diagram which shows the structure of the direct-current power supply part provided with the direct-current voltage control function. The block diagram which shows the structure of another DC power supply part in a temperature control part.

Explanation of symbols

  2 Shooting unit, 3 Image processing device, 10 FPD storage device, 13 Controller, 14 Display, 15 FPD storage case for shooting, 17 Portable type FPD, 19 FPD handle, 20 FPD storage and storage, 21 Vacuum layer or Thermal insulation member, 22 Vibration absorbing member, 23 Aluminum or copper plate, 24 Peltier element, 25 Heat sink, 26 Storage part temperature detector, 27 Outside temperature detector, 28 Temperature control part, 28a DC power supply part of Peltier element, 28a1 DC power supply, 28a2 and 28a3 selector switch, 28a4 DC-DC converter, 28b control unit, 28c FPD storage temperature setting unit, 29 power cable, 30 power supply type signal cable, 31 alarm display unit, 32 generator, 33 battery, 34 external power supply , 35 Power selector, 36 Power selector switch, 40 Outside air temperature, 41 FPD storage / storage temperature, 42 FPD storage maximum temperature, 43 FPD storage minimum temperature, 44 FPD operation maximum Every time, 45 the lowest temperature at the time of FPD operation

Claims (6)

  A semiconductor two-dimensional X-ray detector comprising a storage unit for storing a semiconductor two-dimensional X-ray detector, and a storage temperature control means for controlling a temperature at which the semiconductor two-dimensional X-ray detector is stored by the storage unit. A storage apparatus for a semiconductor two-dimensional X-ray detector, characterized in that the storage temperature control means includes a temperature control means using a Peltier element.   The temperature control means includes a Peltier element, a direct current power source for supplying a direct current for generating a heat quantity for cooling and heating to the Peltier element, a heat radiation means for radiating the heat quantity, and the semiconductor two-dimensional X-ray A storage temperature control signal generating means for generating a control signal for controlling the storage temperature of the detector, and a current direction control means for controlling the direction in which the direct current flows according to the storage temperature control signal, The storage device for a semiconductor two-dimensional X-ray detector according to claim 1.   2. The storage device for a semiconductor two-dimensional X-ray detector according to claim 1, further comprising a heat sink and / or a blower fan for dissipating heat generated in the Peltier element.   A storage unit for storing the semiconductor two-dimensional X-ray detector stores a semiconductor two-dimensional X-ray detector for storing the semiconductor two-dimensional X-ray detector in the storage unit and taking out the semiconductor two-dimensional X-ray detector from the storage unit. And storage means for storing the semiconductor two-dimensional X-ray detector, a vacuum layer or heat insulating means for keeping the semiconductor two-dimensional X-ray detector at a temperature during storage, and the semiconductor two-dimensional X-ray Vibration absorbing means for absorbing vibration during movement of the line detector, vibration absorber holding means by aluminum or copper plate for holding the vibration absorbing means, and the semiconductor two-dimensional X through the vibration absorber holding means A Peltier element for cooling and heating the line detector to maintain a storage temperature that guarantees storage characteristics of the semiconductor two-dimensional X-ray detector, a heat sink that dissipates heat generated by the Peltier element, and Alternatively, a blower fan, storage part temperature detection means for detecting the temperature inside the storage and storage means, outside air temperature detection means for detecting the temperature of the outside air of the storage and storage means, and temperature for controlling the temperature of the storage and storage part The control means, the power cable for supplying power to the Peltier element, the power supply type signal cable for transmitting the type of the power supply to the temperature control means, and the difference between the outside air temperature and the storage container internal temperature is abnormal. The storage device for a semiconductor two-dimensional X-ray detector according to claim 1, further comprising notification means for notifying an operator of this fact.   The semiconductor two-dimensional X-ray detector includes an X-ray conversion unit that converts X-ray energy into light or a charge amount, and a value obtained by converting light converted by the X-ray conversion unit into electric charge, or the X-ray energy. 2. A storage device for a semiconductor two-dimensional X-ray detector according to claim 1, wherein the storage device is a flat panel detector comprising a detection unit using a two-dimensional semiconductor detection element array for detecting a value obtained by directly converting the signal into a charge. .   The storage device for a semiconductor two-dimensional X-ray detector according to any one of claims 1 to 13, wherein the flat panel detector is stored, an image captured by the flat panel detector, and display information of the image. An X-ray imaging apparatus comprising: a display control means for displaying; and a display means for displaying at least the image whose display is controlled by the display control means.

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