Abstract: An X-ray imaging system is provided with an X-ray source (11), first and second absorption gratings (31, 32), and a flat panel detector (FPD) (30), and obtains a phase contrast image of an object H by performing imaging while moving the second absorption grating (32) in x direction relative to the first absorption grating (31). The following mathematical expression is satisfied where p1? denotes a period of a first pattern image at a position of the second absorption grating (32), and p2? denotes a substantial grating pitch of the second absorption grating (32), and DX denotes a dimension, in the x-direction, of an X-ray imaging area of each pixel of the FPD (30). Here, “n” denotes a positive integer.

Abstract: A radiation image capturing apparatus includes: a first grid which includes grid structures disposed at intervals and forms a first periodic pattern image by passing radiation emitted from a radiation source; a second grid provided with grid structures disposed at intervals and forms a second periodic pattern image by receiving the first periodic pattern image; a radiation image detector that detects the second periodic pattern image formed by the second grid; and a detector positioning mechanism that adjusts a position of the radiation image detector in an in-plane direction of a detection plane of the detector such that radiation transmitted through the first and second grids falls within the radiation image detector.

Abstract: A radiographic imaging apparatus includes: a first grating having a periodically-arranged grating structure and allowing radiation to pass therethrough to form a first periodic pattern image; a second grating having a periodically-arranged grating structure to receive the first periodic pattern image and form a second periodic pattern image; a radiographic image detector to detect the second periodic pattern image; a correction data storing unit to separately store detector correction data used to correct for characteristics of the radiographic image detector and grating correction data used to correct for characteristics of the first and second gratings; a correction data updating unit to update the detector correction data and the grating correction data independently from each other; and an image generation unit to generate an image based on the updated detector correction data and grating correction data and the second periodic pattern image.

Abstract: A radiographic phase-contrast imaging apparatus includes: a first grating having a periodically-arranged grating structure and allowing radiation emitted from a radiation source to pass therethrough to form a first periodic-pattern image; a second grating having a periodically-arranged grating structure including areas transmitting the first periodic-pattern image and areas shielding the first periodic-pattern image to form a second periodic-pattern image; a radiographic image detector to detect the second periodic-pattern image; a moving mechanism to effect relative movement of the radiographic image detector toward and away from the radiation source, thereby achieving magnification imaging; and an acceptable magnification factor calculation unit to calculate an acceptable magnification factor based on size information of the radiographic image detector and size information of at least one of the first and second gratings, the acceptable magnification factor ensuring the radiation transmitted through the fir

Abstract: A radiographic apparatus includes: a first grating; a grating pattern having a period that substantially coincides with a pattern period of a radiological image formed by radiation having passed through the first grating; a radiological image detector that detects the radiological image masked by the grating pattern, and a third grating that is arranged at a more forward location than the first grating in a traveling direction of the radiation incident onto the first grating and selectively shields an area to which the radiation is irradiated, thereby forming disperse radiation sources. A heat insulation member is arranged at a more forward location than the third grating in the traveling direction of the radiation.

Abstract: A radiation phase contrast imaging apparatus, including a radiation emission unit having a plurality of electron sources for emitting electron beams, and a target for emitting radiation through collision of electron beam emitted from each electron source, a first grating in which grating structures for diffracting radiation are disposed periodically, a second grating in which grating structures for transmitting and shielding radiation are disposed periodically, and a radiation image detector for detecting radiation transmitted through the second grating, in which the first and second gratings are disposed in an optical axis direction of the radiation so as to be able to substantially superimpose each image of the first grating formed based on radiation corresponding to each electron source on a surface of the second grating, and the radiation corresponding to each electron source forms each phase image of the same subject on the radiation image detector.

Abstract: A radiographic apparatus includes a guide housing, a first grating unit, a radiological image detector and a grating pattern unit. The guide housing houses a first grating unit, the grating pattern unit, and a radiological image detector and supports a subject to which radiation is irradiated. The grating pattern unit includes a periodic form having a period and masks a radiological image formed by the radiation having passed through the first grating. The radiological image detector detects a masked radiological image which is formed by masking the radiological image by the grating pattern unit. The first grating unit and the grating pattern unit are supported by the guide housing with a buffer material being interposed between the first grating unit and the grating pattern unit and an inner wall of the guide housing.

Abstract: A stereoscopic image displaying device enables the stereoscopic view of a stereoscopic cursor to be restored while maintaining the stereoscopic view of a region of interest even in a state where the stereoscopic cursor cannot be viewed stereoscopically. The stereoscopic image displaying device includes a stereoscopic cursor moving unit that moves the stereoscopic cursor in a depth direction and an in-plane direction in response to a movement instruction input; a reference position setting unit in which a reference position in the depth direction and the in-plane direction is set in advance; and a stereoscopic cursor reference position moving unit that moves the stereoscopic cursor moved by the stereoscopic cursor moving unit to the reference position in response to a reference position movement input.

Abstract: A collimator unit includes a filter set for regulating a spectrum of X-rays emitted from an X-ray source, and a source grating having plural X-ray shielding portions and X-ray transmitting portions. The X-ray shielding portions and X-ray transmitting portions extend in a y direction parallel to a rotational axis of a rotating anode of the X-ray source, and are alternately arranged in an x direction orthogonal to an optical axis direction (z direction) of the X-rays. The intensity of the X-rays is reduced in the y direction by a heel effect. However, further reduction in the intensity of the X-rays by vignetting does not occur in the y direction. Since the filter set is disposed upstream from the source grating in an application direction of the X-rays, the source grating forms arrayed narrow focuses of X-ray beams from the X-rays disturbed by a filter element.

Abstract: A radiation imaging system includes an X-ray source, first and second absorption gratins disposed in a path of X-rays emitted from the X-ray source, and an FPD. The second absorption grating is stepwise slid in an X direction relatively against the first absorption grating. Whenever the second absorption grating is slid, the FPD captures a fringe image and produces image data. A correction section corrects the image data for spatial variation of X-ray transmittance of the first and second absorption gratings. A phase contrast image generator produces a phase contrast image from the corrected image data. An X-ray absorption contrast image generator calculates a value related to an average of the corrected image data on a pixel-by-pixel basis, and produces an X-ray absorption contrast image from the value.

Abstract: A radiation phase contrast imaging apparatus, including a radiation emission unit having a plurality of electron sources for emitting electron beams, and a target for emitting radiation through collision of electron beam emitted from each electron source, a first grating in which grating structures for diffracting radiation are disposed periodically, a second grating in which grating structures for transmitting and shielding radiation are disposed periodically, and a radiation image detector for detecting radiation transmitted through the second grating, in which the first and second gratings are disposed in an optical axis direction of the radiation so as to be able to substantially superimpose each image of the first grating formed based on radiation corresponding to each electron source on a surface of the second grating, and the radiation corresponding to each electron source forms each phase image of the same subject on the radiation image detector.

Abstract: An image sensor drive control unit capable of preventing the degradation in image quality due to smearing or blooming with a minimum system change. The drive control unit includes a clock generator that outputs an effective pixel transfer clock during an effective pixel transfer period, and a dummy pixel transfer clock having a higher clock frequency than that of the effective pixel transfer clock during a dummy pixel transfer period following the effective pixel transfer period. The dummy pixel transfer period is set equal to a time period required for outputting a number of clocks corresponding to the number of dummy pixels when the clock frequency of the dummy pixel transfer clock is set equal to that of the effective pixel transfer clock.

Abstract: Reference signal components obtained in an initial state from outputs of photoelectric conversion devices of a line sensor having received reference light produced by a reference light source are stored. The line sensor is caused to receive the reference light at a stage immediately before image readout is performed. Sensitivity signal components are acquired from the outputs of the photoelectric conversion devices having received the reference light at the stage immediately before the image readout is performed. The sensitivity signal components and the reference signal components are compared with each other, and sensitivity correction signal components for making a correction for variations in sensitivity among the photoelectric conversion devices are obtained. A correction of the output signal components, which are acquired from the photoelectric conversion devices during the image readout, is made with the sensitivity correction signal components.

Abstract: Reference signal components obtained in an initial state from outputs of photoelectric conversion devices of a line sensor having received reference light produced by a reference light source are stored. The line sensor is caused to receive the reference light at a stage immediately before image readout is performed. Sensitivity signal components are acquired from the outputs of the photoelectric conversion devices having received the reference light at the stage immediately before the image readout is performed. The sensitivity signal components and the reference signal components are compared with each other, and sensitivity correction signal components for making a correction for variations in sensitivity among the photoelectric conversion devices are obtained. A correction of the output signal components, which are acquired from the photoelectric conversion devices during the image readout, is made with the sensitivity correction signal components.