| Patent application number | Description | Published |
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| 20130264487 | RADIATION IMAGING APPARATUS, RADIATION IMAGING SYSTEM, AND METHOD FOR CONTROLLING THE RADIATION IMAGING APPARATUS - A radiation imaging apparatus includes plural pixels arranged in a matrix each including a conversion element and a switch element, plural drive wires arranged in a column direction, a drive circuit configured to sequentially supply a conduction voltage to the plural drive wires and supply a non-conduction voltage to the drive wires other than the drive wire supplied with the conduction voltage among the plural drive wires, and a sensing unit configured to sense radiation irradiation to the pixel, in which the sensing unit includes a sensing circuit configured to sense the radiation irradiation to the pixel on the basis of a current flowing through the drive wire supplied with the non-conduction voltage among the plurality of drive wires. | 10-10-2013 |
| 20130264488 | RADIATION IMAGING APPARATUS, METHOD OF CONTROLLING THE SAME, AND RADIATION IMAGING SYSTEM - A radiation imaging apparatus including pixels; driving lines; a driving circuit; bias lines; an acquisition unit configured to acquire an evaluation value based on a current flowing in the bias line; a determination unit configured to compare the evaluation value with a comparison target value to determine whether radiation is irradiated; a control unit configured to control the acquisition unit and the determination unit; and a storage unit configured to store the evaluation value used in the determination process, is provided. A comparison target value used in a given determination process is based on one or more evaluation values used in one or more determination processes which are performed before the given determination process and in which it is determined that radiation has not been irradiated. | 10-10-2013 |
| 20130264489 | RADIATION IMAGING APPARATUS, RADIATION IMAGING SYSTEM, AND CONTROL METHOD FOR THE RADIATION IMAGING APPARATUS - A radiation imaging apparatus includes a pixel array including a plurality of pixels arranged in a matrix in which each pixel includes a conversion element configured to convert radiation into a charge and a switch element configured to transfer an electric signal based on the charge, a bias wiring through which the conversion element is supplied with a voltage for the conversion element to convert the radiation into the charge, a power supply unit configured to supply the voltage to the bias wiring; and a detecting unit configured to detect start of radiation irradiation to the pixel array, in which the detecting unit includes a detecting circuit configured to detect the start of the radiation irradiation to the pixel array on the basis of a comparison result through computation on at least two currents flowing through at least two bias wirings among the plurality of bias wirings. | 10-10-2013 |
| 20130264490 | RADIATION IMAGING APPARATUS, RADIATION IMAGING SYSTEM, AND CONTROL METHOD FOR THE RADIATION IMAGING APPARATUS - A radiation imaging apparatus includes a pixel array including a plurality of pixels arranged in a matrix in which each pixel includes a conversion element configured to convert radiation into a charge and a switch element configured to transfer an electric signal based on the charge, a plurality of wirings arranged in the pixel array, and a detecting unit configured to detect radiation irradiation to the pixel array, in which the detecting unit includes a detecting circuit configured to detect the radiation irradiation to the pixel array on the basis of a plurality of currents flowing through the plurality of wirings detected for each of the plurality of wirings. | 10-10-2013 |
| 20140008519 | METHOD FOR CONTROLLING RADIATION IMAGE PICKUP APPARATUS, RADIATION IMAGE PICKUP APPARATUS, AND RADIATION IMAGE PICKUP SYSTEM - A radiation image pickup apparatus capable of setting an optimum threshold value used for instantaneously and highly accurately detecting the presence/absence of irradiation includes a pixel array having a plurality of pixels arranged in a matrix, where each of the pixels includes a conversion element and a switch element, a drive circuit for supplying a drive signal for controlling the switch element between a conducting state and a non-conducting state, a detection unit for outputting a detection signal varying with the intensity of irradiation of the pixel array, and an arithmetic unit for calculating an end threshold value used to detect end of irradiation on the basis of the signal output from the detection unit during a period of time during which irradiation is applied to the pixel array in which the switch elements of the pixels are set in a non-conducting state by the drive circuit. | 01-09-2014 |
| 20140008544 | METHOD FOR CONTROLLING RADIATION IMAGE PICKUP APPARATUS, RADIATION IMAGE PICKUP APPARATUS, AND RADIATION IMAGE PICKUP SYSTEM - A radiation image pickup apparatus includes a pixel array having pixels each including a conversion element and a switch element, a drive circuit for controlling the switch element between a conducting state and a non-conducting state, a detection unit for outputting a detection signal varying with the intensity of irradiation of the pixel array, and an arithmetic unit for calculating a start threshold value used to detect start of irradiation based on the signal output from the detection unit during a period when radiation is not emitted onto the pixel array in which the switch elements are sequentially set in a conducting state on a row-by-row basis by the drive circuit and the signal output from the detection unit during a period when radiation is emitted onto the pixel array in which the switch elements are sequentially set in a conducting state on a row-by-row basis by the drive circuit. | 01-09-2014 |
| 20140042329 | RADIOGRAPHIC APPARATUS AND RADIOGRAPHIC SYSTEM - A radiographic apparatus includes a scintillator configured to convert radiation into first light, a photoelectric conversion unit including a plurality of photoelectric conversion elements each configured to convert the first light into an electrical signal, and a light detection unit configured to detect the first light. In such a radiographic apparatus, the photoelectric conversion unit and the light detection unit are arranged to sandwich the scintillator therebetween, and the light detection unit includes a light guide plate, a photodetector arranged on a side face of the light guide plate, and a light reflection section arranged to reflect the first light toward the photodetector. | 02-13-2014 |
| 20140061488 | RADIATION IMAGING APPARATUS AND RADIATION IMAGING SYSTEM - A radiation imaging apparatus comprises: a detector that includes a detection unit in which pixels having a conversion element that converts radiation to an electric charge are arranged in a matrix shape, a drive circuit that drives the detection unit, and a read circuit that outputs an electric signal corresponding to the electric charge as image data; a radiation detection unit that detects a radiation irradiation state at a plurality of positions in the detection unit; and a control unit that controls operations of the drive circuit and the read circuit in accordance with a detection result obtained by the radiation detection unit, wherein the radiation detection unit detects a radiation irradiation state at least at a center region and a peripheral region in the detection unit, and a detection capability at the center region is set to a higher capability than a detection capability at the peripheral region. | 03-06-2014 |
| 20140061491 | RADIATION IMAGING APPARATUS, METHOD FOR CONTROLLING THE SAME, AND NON-TRANSITORY COMPUTER-READABLE STORAGE MEDIUM - A radiation imaging apparatus, comprising a sensor array in which a plurality of sensors configured to output signals corresponding to irradiated radiation, a detection unit configured to detect radiation, a driving unit configured to drive the sensor array, so as to initialize the plurality of sensors for each row repeatedly at least until the detection unit detects irradiation of radiation and to read out signals from the plurality of sensors for each row sequentially, and a processing unit configured to process signals from the sensor array, so as to correct a signal from the sensor on a row, of the plurality of sensors, which has been initialized during the irradiation of radiation, based on a timing of the initialization. | 03-06-2014 |
| 20140061492 | RADIATION IMAGING APPARATUS AND RADIATION IMAGING SYSTEM - To provide a radiation imaging apparatus and a radiation imaging system that can detect radiation with high accuracy, the radiation imaging apparatus includes: a detection unit in which conversion elements that convert radiation into an electric signal are arranged in a matrix shape; a radiation detection unit configured to detect an irradiation state of radiation; a drive circuit configured to drive the detection unit in accordance with the irradiation state detected by the radiation detection unit; and a radiographing kind setting unit configured to set a radiographing kind, wherein the radiation detection unit changes a radiation detection capability in accordance with the radiographing kind set by the radiographing kind setting unit. | 03-06-2014 |
| 20140061494 | RADIATION IMAGING APPARATUS AND RADIATION IMAGING SYSTEM - A radiation imaging apparatus including: a detector that includes a detection section in which pixels having a conversion element that converts radiation to an electric charge are arranged in a matrix shape, a drive circuit configured to drive the detection section, and a read circuit configured to output an electric signal that corresponds to the electric charge as image data; a radiation detection unit configured to detect a radiation irradiation state using two detection units that are adjacently arranged in the detection section; and a control unit configured to control operations of the drive circuit and the read circuit in accordance with a detection result obtained by the radiation detection unit, wherein a detection capability by one of the detection units is set to a lower capability than a detection capability at by the other of the detection units. | 03-06-2014 |
| 20140061495 | RADIATION IMAGING APPARATUS, METHOD FOR DRIVING THE SAME AND RADIATION IMAGING SYSTEM - A radiation imaging apparatus, comprising a sensor array configured to output a signal in accordance with irradiated radiation, a driving unit configured to output a signal from the sensor array by driving the sensor array, a detecting unit configured to detect irradiated radiation, a control unit configured to control the driving unit to perform first readout to read out a signal corresponding to charge accumulated in the sensor array from the sensor array and perform second readout to further read out a signal from the sensor array at least in a case where the first readout has started during irradiation of radiation, and a processing unit configured to correct the signal obtained by the first readout based on the signal obtained by the second readout. | 03-06-2014 |
| 20140112448 | IMAGING APPARATUS, CONTROL METHOD THEREFOR, AND IMAGING SYSTEM - An imaging apparatus comprises: a detecting unit | 04-24-2014 |
| 20140185764 | IMAGING APPARATUS AND IMAGING SYSTEM - An imaging apparatus has an AEC function that can prevent irregularities in photographed images, without being increased in size. The imaging apparatus comprises a plurality of pixels arranged in a matrix shape, each of the plurality of pixels including a conversion element for converting radiation or light into an electric charge, a plurality of lines that are connected to the plurality of pixel units and that extend in different directions to each other, a current monitor circuit that monitors currents flowing in the plurality of lines, and an arithmetic unit that calculates a two-dimensional distribution by performing back-projection processing with respect to the currents flowing in the plurality of lines monitored by the current monitor circuit. | 07-03-2014 |
| 20140239186 | RADIATION IMAGING APPARATUS, RADIATION INSPECTION APPARATUS, METHOD FOR CORRECTING SIGNAL, AND COMPUTER-READABLE STORAGE MEDIUM - A radiation imaging apparatus, comprising a pixel array on which a plurality of pixels are arrayed, a readout unit configured to read out a signal from the pixel array, a first unit configured to specify a portion of the signal read out by the readout unit, at which a saturated signal whose value has reached a saturation level of an output by the readout unit and a non-saturated signal whose value has not reached the saturation level are mixed, and a second unit configured to correct, based on the non-saturated signal, the saturated signal at the portion specified by the first unit. | 08-28-2014 |
| 20140239187 | RADIATION IMAGING APPARATUS AND RADIATION IMAGING SYSTEM - A radiation imaging apparatus includes a pixel array in which a plurality of pixels which detects radiation are arrayed to form a plurality of rows and a plurality of columns, a detection circuit which detects information having correlation to a radiation dose to the pixel array and output a detection signal corresponding to the information, and a control unit which detects radiation irradiation to the pixel array based on a plurality of integrated values obtained by integrating one of the detection signal and a result of processing applied to the detection signal in a plurality of integral intervals and control the pixel array in accordance with the detection. | 08-28-2014 |
| 20140241501 | RADIATION IMAGING APPARATUS AND RADIATION IMAGING SYSTEM - A radiation imaging apparatus includes a pixel array having pixels, a bias line applying a bias potential to converters of the pixels, a detection circuit which detects a current flowing to the bias line, and a control unit which detects a start of radiation irradiation to the pixel array based on an output from the detection circuit and controls a charge accumulation operation of the pixels in accordance with the detection. The detection circuit includes a differential amplifier circuit and a feedback path, and applies a potential corresponding to a reference bias potential to the bias line. The differential amplifier circuit includes a first input terminal receiving the reference bias potential, a second input terminal connected to the bias line, and an output terminal, and the feedback path connects the output terminal and the second input terminal. | 08-28-2014 |
| 20140241506 | RADIATION IMAGING APPARATUS AND RADIATION IMAGING SYSTEM - A radiation imaging apparatus includes a pixel array having pixels including conversion elements and switching elements, a bias line for supplying a bias potential to the conversion elements; driving lines for supplying a signal to control the switching elements, a driving unit for performing an initialization operation of supplying a driving signal to each driving line group, switching each driving signal from an OFF voltage to an ON voltage, and then returning the driving signal to the OFF voltage; an acquisition unit configured to acquire a plurality of times in each driving cycle a signal value representing a current flowing through the bias line; a calculation unit configured to calculate radiation information based on the signal values; and a determination unit configured to determine whether irradiation of the pixel array with radiation is present based on the radiation information. | 08-28-2014 |
| 20140264060 | RADIATION IMAGE PICKUP APPARATUS, RADIATION IMAGE PICKUP SYSTEM, METHOD FOR CONTROLLING RADIATION IMAGE PICKUP APPARATUS, AND PROGRAM - A radiation image pickup apparatus includes a pixel array including a plurality of pixels arranged in a matrix and configured to convert a radiant ray into electric signals, signal processors configured to output digital signals obtained in accordance with the electric signals output from the pixel array in parallel, and a controller configured to operate the signal processors after the signal processors enter a second power consumption state in which power consumption is higher than that of a first power consumption state from the first power consumption state after irradiation of a radiant ray to the pixel array is terminated, and to cause the signal processors to output digital signals after the signal processors are operated. | 09-18-2014 |
| 20140284491 | RADIATION IMAGE PICKUP SYSTEM - A radiation image pickup system includes a correction coefficient calculation unit that calculates a correction coefficient using pixel output values of a plurality of pixels, and a correction unit that corrects pixel output values of a plurality of pixels using the correction coefficient. A drive control unit repeatedly resets an electric charge caused by a dark current of a plurality of pixels until a detection unit detects a start of radiation exposure. The reset operation is performed simultaneously for n rows that are not adjacent to each other, where n is an integer equal to or greater than 2. The correction coefficient calculation unit calculates the correction coefficient using pixel output values of pixels in a row subjected to the reset operation in a period from a start of radiation exposure to a start detection time and pixel output values of pixels in an adjacent row. | 09-25-2014 |
| 20140285689 | IMAGING SYSTEM - An imaging system comprises: a plurality of pixels each for converting light, converted from radiation by a conversion unit, into an electrical signal; an extracting unit that extracts, based on an image formed based on output signals from the pixels, a pixel with noise generated by the radiation that has transmitted through the conversion unit to arrive at the pixels; and a correcting unit that performs correction to remove the noise with respect to an output signal from the extracted pixel, wherein the extracting unit extracts the pixel with the noise by performing division between first and second images, the first image being formed based on the output signals from the pixels in accordance with the radiation to the conversion unit during a first period, the second image being formed based on these output signals in accordance with that radiation during a second period after the first period. | 09-25-2014 |
| 20140320685 | IMAGING APPARATUS AND IMAGING SYSTEM - An imaging apparatus, comprising a sensor array in which a plurality of sensors are arrayed, a first readout unit configured to read out, from each of the plurality of sensors, a first signal corresponding to an amount of one of an electron and a hole of each of electron-hole pairs generated in the sensor array in response to irradiation with radiation or light, and a second readout unit configured to read out, from each of the plurality of sensors, a second signal corresponding to an amount of the other of the electron and the hole of the electron-hole pairs. | 10-30-2014 |
| 20140361184 | RADIATION IMAGING APPARATUS AND RADIATION IMAGING SYSTEM - A radiation imaging apparatus comprises a conversion element and a transistor. A drive unit performs a reset operation at a plurality of times, by supplying a conducting voltage to gates of the transistors, successively, one row by one row, an operation of stopping the supplying of the conducting voltage responsive to detecting the irradiation of the radiation to perform an accumulation operation and, after the reset operation, a read out operation. During the reset operation, a period between the supplying the conducting voltage to the gates of the transistors in one row and the supplying the conducting voltage subsequently to the gates of the transistors in another row is different from a period between the supplying the conducting voltage to the gates of the transistors in the another row and the supplying the conducting voltage subsequently to the gates of the transistors in further another row. | 12-11-2014 |
| 20140361189 | RADIATION IMAGING SYSTEM - A radiation imaging system includes: a sensor unit including a plurality of pixels arranged in a matrix, and configured to convert a radiation into an electric charge and to output a pixel output value; a detecting unit configured to detect an irradiation start of the radiation; and a control unit configured to output image information based on the irradiation of the radiation and to output dark image information for the plurality of pixels. | 12-11-2014 |
