A method for determining a correction profile of an imaging device may include obtaining first data relating to the imaging device; comparing the first data and a first condition; obtaining, based on the comparison, a first correction profile relating to the imaging device; and calibrating, based on the first correction profile, the imaging device.

The disclosure relates to a system and method for tracking and correcting X-ray focus positions in a computed tomography (CT) device. The device may include an X-ray tube, a collimator, and a detector. The collimator may include an opening, wherein the collimator has a width in a first direction and a length in a second direction. The opening may have an opening width in the width direction of the collimator, and an opening at at least one end of the collimator in the second direction may have an opening width smaller than that of an opening within the middle section of the collimator.

A radiation imaging system comprises a radiation imaging apparatus having a plurality of imaging modes, and a control apparatus configured to control imaging of a radiation image with respect to the radiation imaging apparatus. The radiation imaging system comprises: an obtaining unit configured to obtain information with respect to a communication state between the radiation imaging apparatus and the control apparatus; and a display control unit configured to cause a display unit of at least one of the radiation imaging apparatus and the control apparatus to display information indicating a margin in the communication state based on an imaging mode of the radiation imaging apparatus and the information with respect to the communication state.

Provided is a technology with which defective pixel information in taking a radiation image and defective pixel information in detecting a dose can be generated efficiently. Provided is a radiation imaging apparatus including: a plurality of pixels arranged to convert radiation into an electric signal; and a generation unit configured to generate, based on the electric signal obtained as a result of a conversion by the plurality of pixels, first defective pixel information indicating a defective pixel in taking a radiation image among the plurality of pixels, and second defective pixel information indicating a defective pixel in detecting a dose among the plurality of pixels.

An imaging condition acquisition unit acquires an imaging condition in a case in which a subject is imaged in a state in which an object is interposed between the subject and a radiation detector. A body thickness derivation unit derives a body thickness distribution of the subject based on the radiation image and the imaging condition. A characteristic acquisition unit acquires a radiation characteristic of the object in accordance with the body thickness distribution. A ray distribution unit derives a primary ray distribution and a scattered ray distribution of the radiation detected by the radiation detector by using the imaging condition, the body thickness distribution, and the radiation characteristic. A calculation unit updates the body thickness distribution such that an error between a sum of the primary ray distribution and the scattered ray distribution and a pixel value at each position of the radiation image is smaller than a predetermined threshold value, and repeats the derivation of the radiation characteristic based on the updated body thickness distribution and the derivation of the primary ray distribution and the scattered ray distribution.

The disclosure relates to methods, systems, and computer program products for registering a set of X-ray images with a navigation system. In the method, by a camera, at least one image of a reference object is recorded and, on the basis thereof, a current posture of the reference object is determined. It is then checked whether this posture fulfils a specified criterion, which also on an arrangement of the reference object at least partially outside a planned reconstruction volume of the X-ray device, predicts an expected successful registration. On non-fulfillment of the criterion, a signal for adaptation of a relative alignment between the X-ray device and the reference object is automatically output. On fulfillment of the criterion, the X-ray images of the reference object are recorded, the posture of the reference object is determined, and the registration is carried out using the determined postures as reference.

An apparatus, system and method for calibrating an x-ray apparatus including acquiring sinogram data by scanning a symmetrical phantom using a plurality of detector channels; generating mirror-copied sinogram data by mirror-copying at least one of first sinogram data and second sinogram data of the acquired sinogram data, wherein the first sinogram data and the second sinogram data are generated by dividing the sinogram data at a center detector channel of the plurality of detector channels; outputting a first reconstructed image by reconstructing the mirror-copied sinogram data; and determining a calibration parameter based on the first reconstructed image.

A time correction device for a PET system comprises a detector ring, a ring-shaped prosthesis, and detection, data acquisition, data coincidence, time shift calculation, data correction application modules. Center of the ring-shaped prosthesis overlaps with axial and radial center of the detector ring. The detection module is located in ring-shaped prosthesis. Center of the detection module is at the center of the ring-shaped prosthesis. The data acquisition module comprises data gathering and energy filtering modules connected to each other. The data gathering module comprises detectors and the detection module. The energy filtering module connects to the data gathering module receiving single-event time information. The data coincidence module is connects to the energy filtering module receiving the single-event time information. Time shift calculation module connects to the data coincidence module providing a shift value of the detectors. The data correction application module applies the shift value to the PET system.

A radiation image processing device includes: a first estimation section that estimates components of radiation Ra having passed through a subject Obj using a first radiation image taken from the subject Obj; a second estimation section that estimates components of the radiation Ra, which have passed through an additional scattering element EL, using an estimation result of the first estimation section and scattering characteristics f2(X) of the additional scattering element EL; and a first image generation section that generates a second radiation image, which has been transmitted through the subject Obj and the additional scattering element EL, using an estimation result of the second estimation section.

A radiation imaging device capable of reducing the number of measurement times of calibration data used in pile up correction while maintaining the accuracy of the pile up correction. The radiation imaging device has a photon counting type detector to output an electric signal corresponding to energy of an incident radiation photon. The radiation imaging device includes: an extraction unit that extracts a component by the number of pile ups from a material spectrum, as a photon energy spectrum, obtained by detecting a radioactive ray transmitted through a calibration member, formed by combining plural basal substances having different radiation attenuation coefficients, with the photon counting type detector; and a synthesis unit that generates a calibrated equivalent spectrum, as a photon energy spectrum to be collated with an imaging spectrum obtained by imaging a subject by synthesizing the components by the number of pile ups based on the imaging spectrum.