According to one embodiment, there is provided an X-ray diagnostic apparatus which comprises an X-ray generation unit configured to irradiate an object with X-rays; an X-ray detection unit configured to detect X-rays applied by the X-ray generation unit and transmitted through the object; an image generation unit configured to generate an X-ray image based on X-rays detected by the X-ray detection unit; a recording unit configured to record pressure data acquired by using a pressure sensor provided on a guide wire; a measurement position setting unit configured to set a measurement position for a pressure by the pressure sensor using the X-ray image; and a display unit configured to display the X-ray image almost in real time and superimpose and display the measurement position set by the measurement position setting unit.

The radiation imaging apparatus is provided that includes a radiation detector including a pixel array in which a plurality of pixels being capable of detecting radiation as electric signals are arranged, the radiation transmitted through an AEC sensor used for performing automatic exposure control of radiation irradicated from a radiation generating apparatus, a notifying unit for performing threshold value reached notification to the radiation generating apparatus, if a dose value of the radiation incident on the pixel array reaches a threshold value, and a threshold value setting unit for setting the threshold value in second radiation imaging in which automatic exposure control of the radiation by the radiation detector is performed after first radiation imaging in which the automatic exposure control of the radiation by the AEC sensor is performed, based on pixel values related to the electric signals detected by the plurality of pixels in the first radiation imaging.

A digital radiographic detector system includes a number of DR detectors enclosed by a housing. A base section with wheels has attached thereto a vertical column with a height adjustable horizontal arm extending therefrom. The housing with DR detectors therein is attached to a distal end of the horizontal arm. The housing comprises a major surface made from a radiolucent material to allow the detectors to capture radiographic images via x-rays transmitted through the major surface of the housing. The housing is configured to support the plurality of DR detectors therewithin.

A correction image acquisition process includes: a first gain image acquisition process of reading a pixel signal from a pixel region irradiated with radiation in a state in which a subject is not placed to acquire a first gain image; a pre-irradiation image acquisition process of reading the pixel signal from the pixel region in a state in which the subject is not placed and the radiation is not emitted to acquire a pre-irradiation image; a discarding process of discarding charge accumulated in a pixel of the pixel region after a dose of radiation that saturates the charge is emitted in a state in which the subject is not placed; a post-irradiation image acquisition process of reading the pixel signal from the pixel region to acquire a post-irradiation image after the discarding process is performed; and a second gain image acquisition process of subtracting the pre-irradiation image from the post-irradiation image to acquire a second gain image.

A radiation image imaging apparatus which generates an image from irradiated radiation, the radiation image imaging apparatus including: a communication unit which directly communicates by wireless communication with an information processing apparatus, which performs wireless communication, and receives installation setting information transmitted from the information processing apparatus to perform a predetermined setting at a time of an installation; and a hardware processor which performs the predetermined setting of the radiation image imaging apparatus in accordance with the installation setting information received by the communication unit.

Provided in the invention is a method and a device of Correction of a ring artifact in a CT image and a computer program medium. The method of correction comprises: pre-processing original detection data; marking a bad detector according to data in the pre-processed original sinogram; acquiring a replacing detection value corresponding to the bad detector by means of a first averaging processing; and performing a CT image reconstruction using a sinogram data after the first averaging processing. The device comprises: a pre-processing unit configured to pre-process original detection data; a marking unit configured to mark a bad detector according to data in the pre-processed original sinogram; a first averaging processing unit configured to acquire a replacing detection value corresponding to the bad detector by means of a first averaging processing; and an image reconstruction unit. The invention is able to effectively eliminate the ring artifact in the CT image, and at the same time ensure that there is little loss of the spatial resolution of the CT image.

Disclosed herein is a method comprising: translating a detector module such that a point of the detector module moves along a curve through movement rounds (i), i=1, . . . , M, with M being a positive integer, wherein the curve is smooth; and in the movement round (i), i=1, . . . , M, capturing partial images (i, j) of a scene using the detector module, j=1, . . . , Hi, when the point is at position Pi,j on the curve, with Hi being an integer greater than 1.

A radiation imaging apparatus includes a pixel array including, in an imaging region where a plurality of pixels is arranged in a matrix, a detection pixel group in which a plurality of detection pixels is arranged in a row direction, and a control unit configured to control imaging. A grid having a stripe structure in which a radiation transmissive layer and a radiation absorption layer that are strip-shaped and extend in a first direction are alternately arranged in a second direction is disposed and can be used in the radiation imaging apparatus. The radiation imaging apparatus further includes a determination unit configured to determine whether a mode in which the imaging using signals from the detection pixel group is controlled is executable by the control unit, based on information about an angle between the row direction and the first direction.

A detector sub-assembly for a CT system includes a detector module that includes a mount block having a top planar surface, a Y-axis planar surface that is parallel with the top planar surface, an X-axis planar surface that is orthogonal to the first Y-axis planar surface, and an aperture passing through the X-axis planar surface. The module includes a substrate having a pixelated photodiode positioned thereon, and a two-dimensional anti-scatter grid (ASG) positioned on the pixelated photodiode. The detector sub-assembly includes a support structure including a Y-axis mount surface and an X-axis mount surface, and a second aperture passing through the X-axis mount surface, a mounting screw having an outer diameter that is smaller than an inner diameter of the aperture and passing through the aperture and into the second aperture when the Y-axis planar surface is on the Y-axis mount surface.

A fixture for fabricating a detector mini-module includes a lower block having a Y-datum lower block upper surface, an X-datum lower block surface, and a Z-datum lower block surface orthogonal to both the Y-datum lower and X-datum block surface surfaces. A mount block for a detector is positionable and in contact with the X-datum lower block surface, the Y-datum lower block upper surface, and the Z-datum lower block surface. An intermediate block is positionable on the lower block having an aperture passing through an upper surface and having an X-datum intermediate block surface and a Z-datum intermediate block surface. When a mount block for the detector mini-module is positioned on the lower block, the mount block is biased having an X-axis mount block planar surface aligned with the X-datum lower block surface, and biased having a Z-axis mount block planar surface aligned with the Z-datum lower block surface.