Abstract: A radiation imaging system comprises a radiation detector having a plurality of pixels for detecting radiation arrayed in a matrix, a plurality of detecting pixels arranged in a region in which the plurality of pixels are arrayed in the matrix and configured to output a signal corresponding to an amount of irradiation with the radiation; and a processing unit. The processing unit receives weighting information associated with a region of interest in an imaging range and generates determination information for controlling irradiation with the radiation by applying the weighting information to the corresponding signal.

Abstract: An image processing apparatus that processes an image obtained from an imaging sensor having a plurality of pixels arranged in a matrix pattern, the pixels including a first pixel group for obtaining a pixel value corresponding to a radiation dose and a second pixel group for obtaining an offset value even with irradiation with radiation, performs offset correction of a radiation image obtained from the plurality of pixels by an imaging operation with irradiation with radiation based on a dark image obtained from the plurality of pixels by an imaging operation without irradiation with radiation, calculates a statistic value of pixel values obtained from the second pixel group of the corrected radiation image, and corrects pixel values obtained from the first pixel group, which have been offset-corrected, based on a temporal variation in the statistic value.

Abstract: A radiation imaging apparatus in which a pixel for obtaining an image based on radiation and a light shielded pixel which is shielded from light are arranged in an array, comprises: a setting unit configured to set a region including a plurality of pixels for obtaining the image based on the radiation and cause pixel values based on the plurality of pixels in the region to be output; and a correction unit configured to determine whether the light shielded pixel is included in the region, and correct the pixel values based on the plurality of pixels in the region if the light shielded pixel is included in the region.

Abstract: An image processing apparatus that processes an image obtained from an imaging sensor having a plurality of pixels arranged in a matrix pattern, the pixels including a first pixel group for obtaining a pixel value corresponding to a radiation dose and a second pixel group for obtaining an offset value even with irradiation with radiation, performs offset correction of a radiation image obtained from the plurality of pixels by an imaging operation with irradiation with radiation based on a dark image obtained from the plurality of pixels by an imaging operation without irradiation with radiation, calculates a statistic value of pixel values obtained from the second pixel group of the corrected radiation image, and corrects pixel values obtained from the first pixel group, which have been offset-corrected, based on a temporal variation in the statistic value.

Abstract: A radiation imaging apparatus in which a pixel for obtaining an image based on radiation and a light shielded pixel which is shielded from light are arranged in an array, comprises: a setting unit configured to set a region including a plurality of pixels for obtaining the image based on the radiation and cause pixel values based on the plurality of pixels in the region to be output; and a correction unit configured to determine whether the light shielded pixel is included in the region, and correct the pixel values based on the plurality of pixels in the region if the light shielded pixel is included in the region.

Abstract: A radiation imaging apparatus includes: a radiation detection unit including an image obtaining pixel for obtaining a radiation image and a dose obtaining pixel for obtaining a radiation dose; a generating unit configured to generate calibration data for calibrating an output value of the dose obtaining pixel by comparing an output value of the image obtaining pixel and the output value of the dose obtaining pixel; and a calibration unit configured to calibrate the output value of the dose obtaining pixel by using the calibration data.

Abstract: A radiation imaging apparatus includes: a radiation detection unit including an image obtaining pixel for obtaining a radiation image and a dose obtaining pixel for obtaining a radiation dose; a generating unit configured to generate calibration data for calibrating an output value of the dose obtaining pixel by comparing an output value of the image obtaining pixel and the output value of the dose obtaining pixel; and a calibration unit configured to calibrate the output value of the dose obtaining pixel by using the calibration data.

Abstract: An image processing apparatus that processes a radiation image obtained from a detector in which a plurality of pixels are two-dimensionally arranged includes: an obtainment unit that obtains a radiation image; a control unit that controls, in accordance with radiation dose characteristics of a first pixel in the detector and a first pixel value of the first pixel in the radiation image, a weighting coefficient for the first pixel value of the first pixel and a weighting coefficient for second pixel values that are different from the first pixel value; and a correction unit that corrects the first pixel value in the obtained radiation image based on the weighting coefficients.

Abstract: A radiation imaging apparatus includes a radiation imaging unit configured to capture a radiation image of a subject, a wireless communication unit configured to perform wireless communication with an external apparatus, a wireless reception characteristics obtaining unit configured to obtain a wireless reception characteristic of the wireless communication unit, an estimation unit configured to estimate an amount of noise included in the radiation image on the basis of a characteristic value of the wireless reception characteristic, and a correction unit configured to correct the noise included in the radiation image on the basis of the amount of noise estimated by the estimation unit.

Abstract: A radiographic apparatus which includes an X-ray irradiation unit which irradiates X-rays and an X-ray detection unit which detects an X-ray image of an object irradiated by the X-ray irradiation unit includes a first defect detection unit which detects, as a position-dependent defect, a pixel, of X-ray images, whose pixel value is always abnormal, and acquires position information of the defect in the X-ray image, a second defect detection unit which detects, as a defect, a pixel, of the X-ray images, which temporarily becomes abnormal dependent on the lapse of time, and a determination unit which determines a correction method for correcting the pixel value of the pixel in which the abnormality is detected by the second defect detection unit, based on the information indicating the imaging condition.

Abstract: A radiation imaging apparatus acquires information on a scattered radiation distribution at each rotation angle preliminarily determined for a rotation unit, based on images respectively obtained from a first radiation detection sensor having no grid, and a second radiation detection sensor having a grid. Then, the radiation imaging apparatus corrects the image obtained from the second radiation detection sensor based on the information on the scattered radiation distribution so as to reduce influence of scattered radiation thereon. Next, the radiation imaging apparatus performs reconstruction processing based on the image corrected by the correction unit.

Abstract: First, a connection state is detected. Next, a determination is made as to whether a connection is made via a dedicated line. If it is determined that the connection is not made via a dedicated line, image accumulation time is calculated. Then, after drive timing is changed, an imaging operation is started.

Abstract: A radiation imaging apparatus acquires information on a scattered radiation distribution at each rotation angle preliminarily determined for a rotation unit, based on images respectively obtained from a first radiation detection sensor having no grid, and a second radiation detection sensor having a grid. Then, the radiation imaging apparatus corrects the image obtained from the second radiation detection sensor based on the information on the scattered radiation distribution so as to reduce influence of scattered radiation thereon. Next, the radiation imaging apparatus performs reconstruction processing based on the image corrected by the correction unit.

Abstract: A radiation imaging apparatus that performs radiation imaging of a breast of a subject, which includes a table for laying down the subject; a receiving section that receives a breast of the subject laid on the table in a supine position; a radiation imaging section including a radiation emission unit and a radiation detection unit each located at a position opposing to each other being interposed by the breast of the subject received in the receiving section; and a drive unit that shifts the receiving section to a position suitable for imaging the breast of the subject.

Abstract: First, a connection state is detected. Next, a determination is made as to whether a connection is made via a dedicated line. If it is determined that the connection is not made via a dedicated line, image accumulation time is calculated. Then, after drive timing is changed, an imaging operation is started.

Abstract: A radiographic method and apparatus determine the presence/absence of an afterimage and notify a user to erase the afterimage only when it is necessary instead of erasing the afterimage every time radiography is executed. An FPN image is obtained before radiography and uniformity of the values of pixels contained in the FPN image is determined by using the values of the pixels contained in the FPN image.

Abstract: A radiation imaging apparatus that performs radiation imaging of a breast of a subject, which includes a table for laying down the subject; a receiving section that receives a breast of the subject laid on the table in a supine position; a radiation imaging section including a radiation emission unit and a radiation detection unit each located at a position opposing to each other being interposed by the breast of the subject received in the receiving section; and a drive unit that shifts the receiving section to a position suitable for imaging the breast of the subject.

Abstract: A radiography apparatus with a function for evaluating image quality is provided. To accomplish this, the radiography apparatus includes a radiating-generating unit for emitting radiation, an imaging unit for converting the radiation into image data, a measuring unit for measuring an image-quality evaluating value of the image data, and a determining unit for determining the image quality of the imaging unit based on a plurality of image-quality evaluating values of the image data acquired at a plurality of points in time, where each image-quality evaluating value corresponds to the image data acquired at one of the points in time.

Abstract: An image processing method generates a small number of still images from a plurality of projected time-series images obtained in time series. The method includes storing the time-series images and performing subtraction between a value of a pixel of an entire or a part of at least one time-series image and a value of a corresponding pixel of an entire or a part of another time-series image. The method further includes detecting the presence or absence of motion by comparing a difference value obtained by performing the subtraction and a threshold value. The stored time-series images are synthesized based on a result of the motion detecting so as to generate a predetermined number of synthesized images.

Abstract: An image processing method generates a small number of still images from a plurality of projected time-series images obtained in time series. The method includes storing the time-series images and performing subtraction between a value of a pixel of an entire or a part of at least one time-series image and a value of a corresponding pixel of an entire or a part of another time-series image. The method further includes detecting the presence or absence of motion by comparing a difference value obtained by performing the subtraction and a threshold value. The stored time-series images are synthesized based on a result of the motion detecting so as to generate a predetermined number of synthesized images.