Canon Kabushiki Kaisha

Kabushiki Kaisha Toshiba

Toshiba Electronic Devices & Storage Corporation

Yoshiaki Ishii

Atsushi Iwashita

Kosuke Terui

Sho Sato

Tomoyuki Yagi

Katsuro Takenaka

Yutaka Ishinari

Yuki Iwabuchi

Kai Suzuki

Shinichi Takeda

Toshikazu Tamura

Takuya Ryu

Kanako Komatsu

Daisuke Shinohara

Sudharsan Sundaram Prabhakaran

Tomoko Kinoshita

A radiation imaging apparatus is provided. The radiation imaging apparatus comprises a plurality of pixels used to acquire a radiation image, and a readout circuit configured to read out a signal from each of the plurality of pixels. Correction image data used for performing offset correction is acquired from the plurality of pixels in an acquisition mode associated with an estimated value of the signal and system noise generated when the readout circuit reads out the signal, the estimated value and the system noise being set according to an imaging mode by a user.

Radiation imaging apparatus, radiation imaging system, control method of radiation imaging apparatus, and non-transitory computer-readable storage medium

A radiation imaging apparatus that obtains a radiation image by an energy subtraction method. Each pixel includes a conversion element that converts radiation into an electrical signal and a reset portion that resets the conversion element. Each pixel performs an operation of outputting a first signal corresponding to an electrical signal generated by the conversion element in a first period, and an operation of outputting a second signal corresponding to an electrical signal generated by the conversion element in the first period and a second period. Radiation having first energy is emitted in the first period, and radiation having second energy is emitted in the second period. In each pixel, the reset portion does not reset the conversion element during a period that includes the first period and the second period.

Radiation imaging apparatus, radiation imaging system, and radiation imaging method

A radiation imaging apparatus comprising a pixel array and a readout circuit is provided. The readout circuit includes an integrating amplifier configured to read out a signal from the pixel, a sample-and-hold circuit configured to sample an output from the integrating amplifier, and an A/D convertor configured to perform analog/digital conversion on an output from the sample-and-hold circuit and output the converted output. The apparatus performs first control and second control in parallel in an accumulation period for accumulating the signal in the pixel array. In the first control, the A/D convertor performs an analog/digital conversion operation, and in the second control, the integrating amplifier outputs a reference potential and the A/D convertor is electrically connected to a node configured to output the reference potential of the integrating amplifier.

Radiation imaging apparatus, radiation imaging system, method of controlling radiation imaging apparatus, and non-transitory computer-readable storage medium

A radiation imaging apparatus includes a pixel array including n pixel rows, where n&#x2265;3, and a driving circuit configured to scan the pixel array from a first row toward an nrow, counting from one end of the pixel array. In a case where a region of interest is included in a partial region composed of pixel rows from an irow to a jrow, where 1&#x3c;i&#x2264;j&#x3c;n, the driving circuit starts scanning of the pixel array from the first row, and starts scanning of the pixel array from the first row again during scanning of pixel rows from a (j+1)row to the nrow.

Radiation imaging apparatus, control method for the same, and radiation imaging system

A semiconductor device includes a semiconductor portion, a first insulating film, a second insulating film, a first contact, a second contact, and a gate electrode. The first insulating film is provided on the semiconductor portion. The second insulating film is contacting the first insulating film, is provided on the semiconductor portion, and is thicker than the first insulating film. A through-hole is formed in the second insulating film. The first contact has a lower end connected to the semiconductor portion. The second contact has a lower portion disposed inside the through-hole and a lower end connected to the semiconductor portion. The gate electrode is positioned between the first contact and the second contact, is provided on the first insulating film, and is provided on a portion of the second insulating film other than the through-hole.

Semiconductor device and method for manufacturing same

A radiation imaging apparatus includes a pixel array arranged with a plurality of pixels including conversion units configured to convert radiation into charges and accumulate the charges, a bias line connected to the conversion units of the plurality of pixels, a bias circuit configured to supply a bias potential to the bias line and detect a current flowing in the bias line, a noise reduction circuit configured to reduce, separately from the bias circuit, noise included in the bias potential from the bias circuit, and a switch configured to connect the noise reduction circuit to the bias line.

Radiation imaging apparatus and radiation imaging system

A radiation imaging apparatus is provided. The apparatus comprises pixels that configure a plurality of rows and a plurality of columns and are configured to obtain a radiation image, and a readout unit configured to readout signals from the pixels. The readout unit reads out a signal from pixels simultaneously selected, out of the pixels, in accordance with a row selection line connected in common for each row. In a case where a first pixel for detecting an incident dose during capturing of a radiation image that is set from the pixels is a defective pixel, the readout unit reads out a signal for detecting an incident dose from a second pixel selected from the pixels so that at least one row is arranged between the row that includes the first pixel and a row that includes the second pixel.

Radiation imaging apparatus, radiation imaging system, control method for radiation imaging apparatus, and non-transitory computer-readable storage medium

A radiation imaging apparatus includes a pixel array in which a plurality of pixels are arrayed and a processing unit configured to process pixel signals non-destructively read out from the respective pixels. The processing unit performs a first process of obtaining image data of a plurality of frames by repeatedly reading out image data while the pixel array is irradiated with radiation, with a group of pixel signals from the plurality of pixels corresponding to image data of one frame, and a second process of generating data for a radiation image based on data differences between the image data of the plurality of frames.

Radiation imaging apparatus, driving method therefor, and imaging system

A radiographic imaging apparatus is provided. The apparatus comprises a sensor panel in which pixels are provided and a processor that generates an image that corresponds to the number of radiation photons incident on each of the pixels. In an imaging mode in which an image formed by radiation that has passed through a subject is generated, the processor generates a correction signal by correcting a value of a signal output from the conversion element of each of the pixels according to a correction coefficient for converting the value of the signal output from the conversion element on which a radiation photon was incident to a value that corresponds to an energy value of the radiation photon, and generates an image based on the number of correction signals of pixels on which a radiation photon was incident from among the correction signals of the pixels.

Radiographic imaging apparatus, control method thereof, and computer-readable storage medium

A control unit controls a detector including a pixel array arranged in a matrix, a driving circuit that drives the pixel array by a changeable number of pixels, and a readout circuit that outputs an electrical signal from the pixel array. The control unit controls, with a change from a first image capturing operation for repeating a set of a first accumulation operation and a first image output operation a plurality of times at a first frame rate to a second image capturing operation for repeating a set of a second accumulation operation and a second image output operation a plurality of times at a second frame rate, so that the detector continuously repeats a set of the second accumulation operation and an initialization operation a plurality of times at the second frame rate in a period between the first image capturing operation and the second image capturing operation.

Radiation image capturing apparatus and radiation image capturing system, and control methods therefor

In order to provide a large-area radiation imaging apparatus that has an energy resolution while suppressing the occurrence of an artifact, the radiation imaging apparatus includes a detector and a signal processing unit. The detector includes a plurality of pixels for acquiring a pixel value in accordance with incident radiation. The signal processing unit performs signal processing for estimating energy of a radiation quantum of the incident radiation at a predetermined pixel included in the pixels using the amount of change in the pixel value of the predetermined pixel.

Radiation imaging system, signal processing apparatus, and, radiographic image signal processing method

An energy resolution decrease in a radiation imaging apparatus is suppressed. The apparatus includes a detector including a conversion unit configured to convert incident radiation photons into optical photons or charges, a pixel array including pixels arranged in a two-dimensional matrix and configured to obtain a pixel value in accordance with the optical photons or charges, and an output circuit including a plurality of output channels configured to output the pixel value from the pixel array, and a signal processing unit configured to perform signal processing of correcting the pixel value by using a correction coefficient in accordance with a pixel value obtaining process model in which a process of obtaining the pixel value output from the pixel array via the plurality of output channels on the basis of the optical photons or charges is modeled and obtaining an energy-discriminated radiographic image based on the corrected pixel value.

Radiation imaging system, signal processing apparatus, and signal processing method for radiographic image

A radiation imaging apparatus comprising a pixel array in which a plurality of pixels are arrayed and a processor configured to generate a radiation image based on radio-photons which have entered the pixel array, wherein the processor performs a first process of obtaining a value of a signal from each of the plurality of pixels as a pixel value, a second process of selecting at least one of the plurality of pixels as a reference pixel, and a third process of specifying a detection area of a radio-photon in the pixel array by sequentially referring to pixel values of pixels around the reference pixel as a starting point.

Radiation imaging apparatus and photon counting method

A radiation imaging apparatus is provided. The apparatus comprises a scintillator configured to convert radiation into light, a sensor panel in which a plurality of pixels each comprising a light detector configured to detect the light is arranged in a two-dimensional array, and a processing unit. The processing unit comprises a signal generating unit configured to output signals indicating intensities of the light detected by the light detector of each of the plurality of pixels, and a detection unit configured to identify a group of pixels each of which outputs a signal of a level exceeding a reference value out of the signals and detect, based on a pattern of the group, pileup in which a plurality of radiation photons is detected as a single radiation photon.

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Kawasaki, Japan

Yoshiaki Ishii