Abstract: An ultrasound diagnostic apparatus includes an ultrasound image producer which produces an ultrasound image from reception data based on a predetermined set sound speed, a reception data image producer which produces a reception data image representing a luminance image of an ultrasonic echo wavefront from the reception data corresponding to a predetermined range on at least one scan line in the ultrasound image, a sound speed determination unit configured to determine an optimum sound speed based on ultrasound images respectively produced by the ultrasound image producer while changing the predetermined set sound speed, and a controller which makes an ultrasound image for diagnosis produced by the ultrasound image producer and the reception data image produced by the reception data image producer be displayed simultaneously on a display unit based on the optimum sound speed determined by the sound speed determination unit.

Abstract: This photoacoustic imaging device (100) comprises: a display unit (40) that rewrites a screen (40a) at a predetermined refresh rate (RC) and that displays an image on the screen; and a control unit (30) that performs the acquisition of a detection signal and irradiation with light by a semiconductor light-emitting-element light-source unit at a sampling cycle (SC) shorter than the cycle of the predetermined refresh rate, and that creates an image to be displayed on the display unit from the detection signal detected according to the sampling cycle.

Abstract: A photoacoustic imager includes a light source portion, a detection portion that detects a photoacoustic wave signal caused by a photoacoustic wave generated from a detection object in a specimen that absorbs light applied from the light source portion, and a signal processing portion that corrects a reduction in the signal intensity of the photoacoustic wave signal resulting from attenuation of the photoacoustic wave and generates a photoacoustic wave image by prescribed signal processing.

Abstract: A photoacoustic imager includes a light source portion, a detection portion, and an imaging portion, and the imaging portion is configured to generate a photoacoustic wave image indicating a detection object in motion by acquiring difference data of signals acquired on the basis of a plurality of photoacoustic wave signals detected at different times of generated photoacoustic wave signals.

Abstract: A photoacoustic wave signal converter includes a receiving portion that receives a photoacoustic wave signal generated from a detection object in a specimen that has absorbed light, detected by an ultrasonic probe and a signal conversion portion that generates a conversion signal corresponding to an ultrasonic signal generated when the ultrasonic probe receives an ultrasonic wave on the basis of the photoacoustic wave signal received by the receiving portion and outputs the conversion signal that is generated to an ultrasonic imager.

Abstract: This photoacoustic imager includes a light source portion and a detection portion, and is configured to set pulsed light emitted by the light source portion to a pulse width tw expressed in the following expression, assuming that fmax represents the maximum frequency of an acoustic wave A detected by the detection portion: 0.

Abstract: A probe for an optoacoustic imaging device has an irradiator and a detector. The irradiator includes a light-emitting semiconductor element light source that irradiates a tested object with light. The detector detects an optoacoustic wave generated in the tested object as a result. The irradiator is removably fitted to the detector.

Abstract: This photoacoustic imager includes a light source portion, a detection portion, an amplification portion and an imaging portion, and the amplification portion is so configured that an acoustic gain which is a gain of the amplification portion for amplifying a detection signal resulting from an acoustic wave is larger than an ultrasonic gain which is a gain of the amplification portion for amplifying a detection signal resulting from an ultrasonic wave.

Abstract: A radiation irradiation device is provided that includes: a metal target that emits bremsstrahlung X-rays as a radiation beam due to irradiation with an electron beam; a radiation shielding member that includes a slit-shaped radiation passage portion and that is disposed downstream of the metal target in the radiation beam emission direction and is disposed such that a portion of the radiation beam passes through the radiation passage portion and the radiation beam incident to regions other than the radiation passage portion is blocked; and an electron beam generating device that irradiates, onto the metal target, an electron beam such that a diameter at a generation point of the emitted radiation beam is smaller than a length of an entry portion of the radiation passage portion along a length direction of the entry portion.

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: In a photoacoustic imaging apparatus, a detecting portion includes a light source portion having a plurality of LED elements, an ultrasonic detector arranged in the vicinity of the light source portion, configured to detect an acoustic wave as an ultrasonic wave generated by absorption of light emitted from the light source portion to a test object, and a light source drive circuit arranged in the vicinity of the light source portion, driving the light source portion.

Abstract: A radiographic image capturing apparatus includes a housing and a radiation detector accommodated in the housing. The radiation detector includes a scintillator for converting radiation into visible light and photodiodes for converting the visible light into electric charges. If it is assumed that a temperature-dependent rate of change in sensitivity of the scintillator with respect to the radiation is represented by A [%/K] and a temperature-dependent rate of change in sensitivity of the photodiodes with respect to visible light is represented by B [%/K], a scintillator and photodiodes are selected having temperature-dependent rates of change A and B that satisfy the following inequality (1): ?0.35 [%/K]<A+B<0.35 [%/K]??(1).

Abstract: An ultrasound diagnostic apparatus includes an ultrasound image producer which produces an ultrasound image from reception data based on a predetermined set sound speed, a reception data image producer which produces a reception data image representing a luminance image of an ultrasonic echo wavefront from the reception data corresponding to a predetermined range on at least one scan line in the ultrasound image, a sound speed determination unit configured to determine an optimum sound speed based on ultrasound images respectively produced by the ultrasound image producer while changing the predetermined set sound speed, and a controller which makes an ultrasound image for diagnosis produced by the ultrasound image producer and the reception data image produced by the reception data image producer be displayed simultaneously on a display unit based on the optimum sound speed determined by the sound speed determination unit.

Abstract: A radiation irradiation device is provided that includes: a metal target that emits bremsstrahlung X-rays as a radiation beam due to irradiation with an electron beam; a radiation shielding member that includes a slit-shaped radiation passage portion and that is disposed downstream of the metal target in the radiation beam emission direction and is disposed such that a portion of the radiation beam passes through the radiation passage portion and the radiation beam incident to regions other than the radiation passage portion is blocked; and an electron beam generating device that irradiates, onto the metal target, an electron beam such that a diameter at a generation point of the emitted radiation beam is smaller than a length of an entry portion of the radiation passage portion along a length direction of the entry portion.

Abstract: A radiographic phase-contrast imaging apparatus obtains a phase-contrast image using two gratings including the first grating and the second grating. The first and second gratings are adapted to form a moire pattern when a periodic pattern image formed by the first grating is superimposed on the second grating. Based on the moire pattern detected by the radiographic image detector, image signals of the fringe images, which correspond to pixel groups located at different positions with respect to a predetermined direction, are obtained by obtaining image signals of pixels of each pixel group, which includes pixels arranged at predetermined intervals in the predetermined direction, as the image signal of each fringe image, where the predetermined direction is a direction parallel to or intersecting a period direction of the moire pattern other than a direction orthogonal to the period direction. Then, a phase-contrast image is generated based on the obtained fringe images.

Abstract: A radiation detector for detecting irradiated radiation that includes: a converting layer for converting radiation irradiated from a radiation source capable of irradiating radiation from two imaging directions, which are different from each other, into electric charges; and a plurality of pixel electrodes for collecting the converted charges. In the radiation detector, when at least one of the two imaging directions forms a specified angle ? with respect to the direction that is orthogonal to the detector plane of the radiation detector, the thickness d of the converting layer and the sizes p of the pixel electrodes satisfy the condition: d·tan ?<k·p (k is a constant of 1 or less).

Abstract: A radiation detector for detecting irradiated radiation that includes: a converting layer for converting radiation irradiated from a radiation source capable of irradiating radiation from two imaging directions, which are different from each other, into electric charges; and a plurality of pixel electrodes for collecting the converted charges. In the radiation detector, when at least one of the two imaging directions forms a specified angle ? with respect to the direction that is orthogonal to the detector plane of the radiation detector, the thickness d of the converting layer and the sizes p of the pixel electrodes satisfy the condition: d·tan ?<k·p (k is a constant of 1 or less).

Abstract: A radiographic phase-contrast imaging apparatus obtains a phase-contrast image using two gratings including the first grating and the second grating. The first and second gratings are adapted to form a moire pattern when a periodic pattern image formed by the first grating is superimposed on the second grating. Based on the moire pattern detected by the radiographic image detector, image signals of the fringe images, which correspond to pixel groups located at different positions with respect to a predetermined direction, are obtained by obtaining image signals of pixels of each pixel group, which includes pixels arranged at predetermined intervals in the predetermined direction, as the image signal of each fringe image, where the predetermined direction is a direction parallel to or intersecting a period direction of the moire pattern other than a direction orthogonal to the period direction. Then, a phase-contrast image is generated based on the obtained fringe images.

Abstract: The present invention provides a radiographic imaging device that may image radiographic images with high sharpness while suppressing a drop in sensitivity. Namely, a radiation detector, in which a scintillator that generates light due to irradiation of radiation and a TFT substrate on which plural sensor portions configured including an organic photoelectric conversion material that generates electric charges by receiving light are disposed are sequentially layered, is positioned in such a way that radiation that has passed through a subject is made incident from the TFT substrate side.

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.