Abstract: A radiographic imaging device includes: a radiation detector including plural pixels, each including a sensor portion and a switching element; a detection unit that detects a radiation irradiation start if an electrical signal caused by charges generated in the sensor portion satisfies a specific irradiation detection condition, and/or if an electrical signal caused by charges generated in a radiation sensor portion that is different from the sensor portion satisfies a specific irradiation detection condition; and a control unit that determines whether or not noise caused by external disturbance has occurred after the detection unit has detected the radiation irradiation start, and if the noise has occurred, that stops a current operation of the radiation detector, and causes the detection unit to perform detection.

Abstract: In a detection panel, plural pixels which receive X-ray and accumulate electric charge and plural measuring pixels which detect X-ray dose are provided on an imaging surface. The plural measuring pixels are arranged periodically with an interval. In a position facing to the imaging surface, there is a grid where X-ray absorbing sections and X-ray transmitting sections are arranged in a periodic alternating manner in a first direction. Since the arrangement period of the measuring pixels in the first direction is different from a fluctuation period of grid detection signals obtained when the grid is photographed by the detection panel, output values of the plurality of measuring pixels disperse and a fluctuation range of average values is suppressed.

Abstract: A detection panel has a plurality of pixels for accumulating electric charge by receiving X-rays, and a plurality of detection pixels for detecting an X-ray dose in an imaging surface. The detection pixels are disposed periodically with leaving space. A grid, which has X-ray absorbing portions and X-ray transmitting portions alternately and periodically arranged in a first direction, is disposed in a position opposed to the imaging surface. Since an arrangement period of the detection pixels in the first direction is different from an arrangement period of the X-ray absorbing portions, an output value of each detection pixel is distributed and hence the average of the output values has a reduced variation range.

Abstract: Upon input of a synchronization signal, which indicates a start of an X-ray emission, from a source control unit for controlling an X-ray source, an electronic cassette makes an FPD start an accumulation operation and measurement of an X-ray dose. The electronic cassette and a console command their communicators to stop communication of any signal other than a stop signal, which stops the X-ray emission from the X-ray source, during the accumulation operation of the FPD. As soon as the X-ray dose has reached a predetermined threshold value, the electronic cassette transmits the stop signal to the source control unit through the console. A delay in transmission of the stop signal due to communication congestion or signal collision does not occur, because the electronic cassette and the console stop the communication of the signal other than the stop signal.

Abstract: A communication section having a relatively high communication speed is used for communicating a detection signal or an emission stop signal between a source control device and an electronic cassette. The detection signal is outputted from a detection pixel of the electronic cassette. The emission stop signal depends on a comparison result between an integrated value of the detection signal and an emission stop threshold value. On the other hand, a wireless communication section having a lower communication speed than that of the detection signal and the emission stop signal is used for communicating image data and the like between the electronic cassette and a console.

Abstract: A radiographic image capturing system includes a radiographic image capturing device, a grid, an acquiring unit, and a processor. The radiographic image capturing device includes a radiation detector in which pixels having a sensitivity with respect to radiation or light are disposed two-dimensionally at a predetermined pixel spacing. The grid is placed on a radiation source side of the radiation detector, and includes radiation absorbing members that are disposed at a predetermined spacing. The acquiring unit acquires an inclination angle of the grid, with respect to an array direction of the pixels, with which a spatial frequency of moiré fringes generated by the absorbing members in a captured radiographic image will be equal to or greater than a predetermined spatial frequency. The processor executes predetermined processing for making a relative angle between the grid and the radiation detector the acquired inclination angle.

Abstract: In a radiographic image acquiring apparatus, in the event that one radiation detection device is selected from among a plurality of radiation detection devices, each of which are capable of converting radiation into a radiographic image, the radiographic image acquiring apparatus includes an acquisition unit for acquiring all of the radiographic images from the plurality of radiation detection devices, including the radiographic image from the one radiation detection device, at a time when application of radiation with respect to a subject is carried out.

Abstract: A flat panel detector has an imaging area, in which pixels are arrayed in a matrix and signal lines for reading out electric signals from the pixels are provided, to detect an image of a subject from x-rays which are incident on the imaging area after penetrating the subject. Detective elements are arranged in the imaging area, to output electric signals corresponding to incident x-rays. Based on previously stored sensitivity data on the detective elements, high-sensitivity elements are selected from among the detective elements. The start of radiation and the end of radiation of x-rays toward the imaging area are detected by monitoring the electric signals from the selected high-sensitivity elements, to control operation of the imaging device on the basis of the detected start and end of radiation.

Abstract: A radiation detecting cassette houses therein a detector for detecting a load applied to the radiation detecting cassette when a patient has moved. It is determined whether or not the patient has moved in an image capturing process based on the load detected by the detector. If it is judged that the patient has moved, then a warning is displayed, and a radiation image of the subject is inhibited from being captured.

Abstract: When all TFTs are turned on, an electric signal is compared with a first threshold value. If the electric signal is equal to or more than the first threshold value, a first judgment unit judges that X-ray irradiation has been started. A second judgment unit compares second and third threshold values with a first-order differentiation value of an electric signal that is outputted in a state of turning off all the TFTs. If the first-order differentiation value is within or out of a range defined by the second and third threshold values throughout a verification period, the second judgment unit verifies that the judgment of the first judgment unit is correct. When the judgment of the first judgment unit is verified to be correct, the TFTs are kept turned off, and an FPD continuously carries out charge accumulation operation for capturing an X-ray image.

Abstract: An apparatus for determining a seat occupancy includes a load detecting portion provided between one of a front portion and a rear portion of a seating portion of a seat for a vehicle that includes a lifting function for changing a height position of the seating portion relative to a floor for the vehicle, the seat including a seat back at the rear portion of the seating portion of the seat, the load detecting portion detecting a seating load applied to the seating portion, and a seat occupancy determining portion comparing the seating load detected by the load detecting portion with a predetermined threshold value and determining a seat occupancy state of the seat, the seat occupancy determining portion changing the threshold value based on the height position of the seating portion.

Abstract: A radiological image detection apparatus includes an imaging unit, a storage unit, a correction data generating unit, a correction unit, a disturbance detection unit, and a determination unit. The imaging unit acquires radiological image data. The storage unit stores correction data for correcting the radiological image data. The correction data generating unit generates new correction data based on dark image data and updates the correction data stored in the storage unit. The correction unit performs a correction process for the radiological image data using the correction data. The disturbance detection unit detects a disturbance acting when the imaging unit acquires the dark image data. The determination unit determines whether the updating of the correction data stored in the storage unit is permitted, or whether the acquisition of the dark image data is permitted, based on the detection result of the disturbance detection unit.

Abstract: A compensation circuit 76 of an AEC unit 67 of an electronic cassette 13 defines the detection signal of a detection pixel 65 of the electronic cassette 13 as a detection signal corresponding to the detection signal of an old AEC sensor 25. The compensation circuit 76 performs compensation so as to exclude the influence on the detection signal due to a difference in the configuration of an intermediate member disposed between an X-ray source 10 and an FPD 35 of the electronic cassette 13 when the detection pixel 65 is used as an AEC sensor instead of the old AEC sensor 25. The detection signal is transmitted from a detection signal I/F 80 to a detection signal I/F 26 of a source control device 11 as it is (instantaneous value) or as an accumulated value obtained using an integration circuit 77.

Abstract: When an AEC sensor is changed, the same AEC as before changing the AEC sensor is carried out without modifying an existing apparatus. A storage and search unit of a console acquires a source ID and searches for and extracts position information of a detection field of an old AEC sensor corresponding to the acquired source ID from source information of a storage device. An electronic cassette includes plural detection pixels as a new AEC sensor short-circuited to signal lines without passing through TFTs in the same imaging plane as pixels. A detection field selecting circuit of an AEC unit of the electronic cassette selects a detection signal from the detection pixel existing at the position of the detection field of the old AEC sensor among the detection signals of the plural detection pixels.

Abstract: A source controller unit for controlling an x-ray source is provided with a detection signal interface for receiving detection signals from detective pixels of an electronic cassette or an integrated value of the detection signals only, or an interface for receiving a radiation stopping signal only. The source controller unit receives other radiation signals than the radiation stopping signal, such as a radiation admitting signal, through a radiation signal interface. The source controller unit uses the detection signals, the integrated value thereof, or the radiation stopping signal as exposure control signals for stopping radiation from the x-ray source. Since the exposure control signals are received on the specific interface therefor, the source controller unit does not need signal sorting operation nor receive different kinds of signals at the same time, improving the speed of radiation stopping procedure.

Abstract: A storage and search unit of a console acquires a source ID of an X-ray source and searches for and extracts a type corresponding to the acquired source ID from source information of a storage device. In the case of an installation convenience preference type in which convenience in connection between a source controller and an electronic cassette is preferred, a detection signal from a detection pixel of an FPD of the electronic cassette is output from a detection signal I/F of the electronic cassette to a detection signal I/F of the source controller. In the case of an installation convenience non-preference type, an irradiation stop signal based on the comparison result of the integrated value of the detection signal from the detection pixel with an irradiation-stop threshold is output from an irradiation signal I/F of the electronic cassette to an irradiation signal I/F of the source controller.

Abstract: A comparison circuit 78 of an AEC unit 67 of an electronic cassette 13 compares the accumulated value of a detection signal from a detection pixel 65 of the electronic cassette 13 with an irradiation prohibition threshold value on the electronic cassette 13. When the accumulated value of the detection signal reaches the irradiation prohibition threshold value on the electronic cassette 13, a detection signal having the same voltage value as the irradiation prohibition threshold value of the radiographing condition on the source control device 11 paired with the radiographing condition on the electronic cassette 13 is output from a detection signal I/F 80 of the electronic cassette 13 toward a detection signal I/F 26 of the source control device 11.

Abstract: Upon a request for sharing radiation dose information, a hospital A transmits first specification data of a first X-ray imaging system to a hospital B. The first specification data is written to a storage device of the hospital B. The storage device stores absorption data and second specification data, besides the first specification data. A storing and retrieving processing unit outputs the first and second specification data to an arithmetic section. Also, the storing and retrieving processing unit retrieves absorptance corresponding to the type of used intermediate member from the absorptance data, and sends a retrieval result to the arithmetic section. The arithmetic section converts a first optimal dose used in the first X-ray imaging system into a second optimal dose suitable for specifications of a second X-ray imaging system, based on data transmitted from the storing and retrieving processing unit.

Abstract: A wireless communication control unit controls a transmitting and receiving apparatus so as to prohibit transmission of radiation image information to the outside by wireless communication or power supply from the outside to an electric power source by wireless communication in accordance with an exposure detecting signal from an exposure detecting unit or a conversion detecting signal from a conversion detecting unit. Thus, this can control the transmitting and receiving apparatus not to carry out, at the same period of time, the irradiation of a radiation (X) to a radiation detector, a conversion operation of the radiation image information in the radiation detector, and wireless communication by the transmitting and receiving apparatus.

Abstract: The disclosed radiograph acquisition device has: a selection unit that selects one radiation detection device from among a plurality of radiation detection devices that can convert radiation to radiographs; and an acquisition unit that acquires the radiograph of one radiation detection device when radiation is radiated at a subject, and the radiograph of at least one other radiation detection device aside from the one radiation device among the plurality of radiation detection devices.