A system has an imaging system housing and an x-ray source, thereto, a compression arm assembly housing, a support, and a detector. A paddle is disposed between the support and the x-ray source. A bottom surface of the paddle at least partially defines a plane. When in a rest position, the plane is substantially parallel to the support. A pivot mechanism connects the paddle to the compression arm assembly housing. The pivot mechanism defines an axis of rotation substantially parallel to a sagittal plane of the patient. The pivot mechanism has at least one biasing element for biasing the paddle into the rest position.

Provided is a radiation phase-contrast imaging device capable of assuredly detecting a self-image and precisely imaging the internal structure of an object. According to the configuration of the present invention, the longitudinal direction of a detection surface of a flat panel detector is inclined with respect to the extending direction of an absorber in a phase grating. This causes variations in the position (phase) of a projected stripe pattern of a self-image at different positions on the detection surface. This is therefore expected to produce the same effects as those obtainable when a plurality of self-images are obtained by performing imaging a plurality of times in such a manner that the position of the projected self-images on the detection surface varies. This alone, however, results in a single self-image phase for a specific region of the object. Therefore, according to the present invention, it is configured such that imaging is performed while changing the relative position of the imaging system and the object.

An X-ray detector and an X-ray CT apparatus that facilitate collimator plate arrangement are characterized by comprising radiation detection element arrays in which a plurality of radiation detection elements detecting a radiation generated from a radiation source are arranged in a first direction and a second direction orthogonal to the first direction, collimator plates that are arranged along the first direction on the radiation source side of the radiation detection element arrays to remove scattered radiations, and collimator plate support members that have grooves supporting the collimator plate and are arranged along the second direction between the radiation detection elements.

A raw DPC (differential phase contrast) image of an object is acquired. The background phase distribution due to the non-uniformity of the grating system is acquired by the same process without an object in place, and the true DPC image of the object is acquired by subtracting the background phase distribution from the raw DPC image.

An antiscatter grid for radiological imaging, the grid formed as a stack of two or more sheets having a flexible substrate, wherein each sheet has spaced-apart opaque cavities, each opaque cavity containing a radio-opaque material. The opaque cavities define a plurality of channels that extend through the sheets to allow ionizing radiation to pass therethrough. Magnets disposed along the sheets couple each sheet to one or more neighboring sheets of the stack.

Radiographic imaging system including: an x-ray transmission unit; an x-ray receiver unit; a plate made from a material opaque to x-rays and situated between the transmission unit and the receiver unit, the plate including at least four channels, each channel enabling a part of the x-rays emitted by the transmission unit to pass through the channel; and an image processing unit configured to determine the coordinates of the projected patterns and to calculate a position of the receiver unit from the coordinates of the projected patterns and from the coordinates of the channels.

A radiographic imaging apparatus includes an imaging apparatus and a hardware processor. The imaging apparatus obtains moire fringe images for generating a reconstruction image of a subject by using a Talbot-Lau interferometer comprising a radiation source, a multiple slit, a first grating, a second grating and a radiation detector. The hardware processor performs a control to satisfy relations (i) φ≧(½)×(R.sub.S/R.sub.1)×d.sub.1>φ×0.7, (ii) 1≦φ≦10 (μm), and (iii) 0.5≦(R.sub.s/R.sub.1)≦1. φ is a particle size of a microbubble contrast agent to be used in imaging. d.sub.1 is a slit period of the first grating. R.sub.1 is a distance between the multiple slit and the first grating. R.sub.s is a distance between the multiple slit and the subject.

A system and method relating to a radiation based imaging are provided. The system may include a radiation source, a detector and a first grid. The detector may include a plurality of detector cells. The first grid may be located between the radiation source and the detector cells and the first grid may include a plurality of radiation transmitting sections. At least one of the plurality of detector cells may include an active area which may be configured to receive radiation from the radiation source that passes through at least one of the plurality of radiation transmitting sections of the first grid. The active area may be adjustable by adjusting the first grid. The radiation source, the first grid and the detectors cells may be operatively coupled for detecting an object. The method may include adjusting the first grid to adjust the active area of the detector.

A radiation imaging apparatus that is able to perform radiography using a grid in which a radiation transmissive layer and a radiation absorption layer each having a strip shape and extending in a first direction are alternately arranged in a second direction, the radiation imaging apparatus includes a pixel unit including a plurality of imaging pixels and a plurality of detection pixels, wherein the plurality of detection pixels includes a first detection pixel and a second detection pixel that are in a pair in the second direction, an output signal value of the first detection pixel is larger than an average value of output signal values of the plurality of imaging pixels and the plurality of detection pixels, and an output signal value of the second detection pixel is smaller than the average value.

A structure according to an embodiment is disposed between an X-ray emitter and a subject, and includes a scatterer configured to scatter X-rays emitted from the X-ray emitter, and a transmitter configured to transmit X-rays at a predetermined angle, among the X-rays scattered by the scatterer.