Abstract: A radiation imaging system includes a communication device configured to perform wireless communication with a radiation imaging apparatus configured to capture a radiographic image, and an information processing apparatus. The information processing apparatus causes the communication device to perform the wireless communication with the radiation imaging apparatus, based on information about a distance between the communication device and the radiation imaging apparatus and a threshold value set in advance.

Abstract: A radiation imaging apparatus includes a plurality of antennas that performs at least one of reception of control data for an image capturing unit to capture radiation image data from a data processing apparatus and transmission of the radiation image data to the data processing apparatus via wireless communication, a selection unit that selects an antenna to be used from the plurality of antennas, and a control unit that controls the selection unit. The control unit restricts a selection by the selection unit such that the selection is not performed during a period when the image capturing unit captures the radiation image data.

Abstract: A radiation detection apparatus includes a pixel array including pixels each including a conversion element and a switch element, an acquisition unit configured to acquire a first signal generated in the pixel array while at least one switch element of the pixels is in a conductive state, and a second signal generated in the pixel array while the switch elements are in a non-conductive state, an evaluation value determination unit configured to determine, based on the first signal, an evaluation value having a correlation with a radiation dose, a threshold value determination unit configured to determine a threshold value based not on the evaluation value but on the second signal, and a determination unit configured to determine, based on comparison between the evaluation value and the threshold value, whether the pixel array is being irradiated with radiation.

Abstract: A radiation detection apparatus includes a pixel array including pixels each including a conversion element and a switch element, an acquisition unit configured to acquire a first signal generated in the pixel array while at least one switch element of the pixels is in a conductive state, and a second signal generated in the pixel array while the switch elements are in a non-conductive state, an evaluation value determination unit configured to determine, based on the first signal, an evaluation value having a correlation with a radiation dose, a threshold value determination unit configured to determine a threshold value based not on the evaluation value but on the second signal, and a determination unit configured to determine, based on comparison between the evaluation value and the threshold value, whether the pixel array is being irradiated with radiation.

Abstract: A radiation imaging apparatus includes a radiation detection unit that acquires a radiation image, a decision unit that decides whether or not the radiation image meets a decision criterion of success or failure of imaging, and a storage unit that associates and stores the radiation image and a result of the decision.

Abstract: A radiation imaging system is provided. The system includes radiation imaging apparatuses having an arrangement capable of detecting a start of radiation irradiation, and comprising an output unit to output a first signal representing that the apparatus itself has detected a start of irradiation and a receiving unit to receive a second signal representing that another apparatus has detected the start. In a case in which the start of irradiation is detected in a first state, the apparatus transitions to a second state for generating the image data and outputs the first signal. The apparatus in the second state generates the image data regardless of reception of the second signal. In a case in which the second signal is received in the first state, the apparatus transitions to a third state in which power consumption is lower than the first state.

Abstract: A radiation imaging apparatus includes a control unit that controls a radiation image capturing operation performed by a pixel array based on determination of start of radiation irradiation based on comparison between a measured value that is an amount of change with respect to a reference value and acquired using a detection unit for detecting irradiation of the pixel array with radiation and a threshold value in one of positive and negative with respect to the reference value. The control unit changes the threshold value within a predetermined range and according to the measured value in other range of the positive and the negative.

Abstract: A radiation imaging apparatus includes a sensor unit in which a plurality of detecting elements each configured to detect emitted radiation are arranged, and a notification unit configured to make a notification by a sound. As the sound produced from the notification unit, a sound having a fundamental frequency which satisfies a condition determined based on the number of rows of a predetermined area of an image read out from the sensor unit and a readout frequency of signals of each row is used.

Abstract: A radiation imaging system is provided. The system includes radiation imaging apparatuses having an arrangement capable of detecting a start of radiation irradiation, and comprising an output unit to output a first signal representing that the apparatus itself has detected a start of irradiation and a receiving unit to receive a second signal representing that another apparatus has detected the start. In a case in which the start of irradiation is detected in a first state, the apparatus transitions to a second state for generating the image data and outputs the first signal. The apparatus in the second state generates the image data regardless of reception of the second signal. In a case in which the second signal is received in the first state, the apparatus transitions to a third state in which power consumption is lower than the first state.

Abstract: A radiation imaging apparatus includes a control unit that controls a radiation image capturing operation performed by a pixel array based on determination of start of radiation irradiation based on comparison between a measured value that is an amount of change with respect to a reference value and acquired using a detection unit for detecting irradiation of the pixel array with radiation and a threshold value in one of positive and negative with respect to the reference value. The control unit changes the threshold value within a predetermined range and according to the measured value in other range of the positive and the negative.

Abstract: A radiation imaging apparatus includes a sensor unit in which a plurality of detecting elements each configured to detect emitted radiation are arranged, and a notification unit configured to make a notification by a sound. As the sound produced from the notification unit, a sound having a fundamental frequency which satisfies a condition determined based on the number of rows of a predetermined area of an image read out from the sensor unit and a readout frequency of signals of each row is used.

Abstract: A radiation imaging apparatus includes a radiation detection unit that acquires a radiation image, a decision unit that decides whether or not the radiation image meets a decision criterion of success or failure of imaging, and a storage unit that associates and stores the radiation image and a result of the decision.