An X-ray image processing method, including obtaining a first X-ray image of an object including a plurality of materials including a first material and a second material; obtaining a first partial image generated by imaging the first material and a second partial image generated by imaging the first material overlapping the second material from the first X-ray image; obtaining first information related to a stereoscopic structure of the first material, based on the first partial image included in the first X-ray image; and obtaining second information about the second material based on the first information and the second partial image.

The present invention comprises: a first X-ray irradiation apparatus and a second X-ray irradiation apparatus for irradiating a subject with X-rays; an X-ray generation unit supporting so that first and second X-rays irradiated onto the subject are detected by a set detector when the subject is irradiated with the first and second X-rays from the first and second X-ray irradiation apparatuses, respectively; and a mode selection unit for allowing selection of any one mode from among a 2D imaging mode and 3D imaging mode, wherein the angles with respect to the subject of the first and second X-ray irradiation apparatuses are determined on the basis of said any one mode selected by means of the mode selection unit from among the 2D imaging mode and 3D imaging mode. According to the present invention, the mode can be easily selected according to need from among the 2D imaging mode and 3D imaging mode.

A radiographic imaging apparatus acquires a plurality of two-dimensional pickup images taken at different angles and a three-dimensional image of a processing target imaged in advance. Two-dimensional calculated projection images are generated from the three-dimensional image, respectively, in association with the two-dimensional pickup images. A characteristic region indicates a treatment instrument represented in the two-dimensional pickup image. The two-dimensional pickup image is aligned with the calculated projection image. A deformation amount of the processing target in the two-dimensional pickup image is calculated by comparing the two-dimensional pickup image with the calculated projection image, and a position of the characteristic region is corrected. A three-dimensional position of the characteristic region is calculated and corrected on the basis of anatomical structure information of the processing target. A position mapping part then superimposes the corrected three-dimensional position of the characteristic region on the three-dimensional image to be displayed on a display unit.

The disclosure provides a method and device for performing three-dimensional blood vessel reconstruction using angiographic images. The method includes an acquisition step that acquires a first two-dimensional image of the blood vessel in the first projection direction and a corresponding reconstructed three-dimensional model of the blood vessel. The method further includes a simulated light path length determining step that determines simulated optical path length within the blood vessel at a position thereof in the first projection direction based on the three-dimensional model of the blood vessel, and a three-dimensional reconstruction adjustment step that adjusts reconstruction parameters of the three-dimensional model of the blood vessel, based on the simulated optical path length within the blood vessel at the position in the first projection direction, intensity value at the corresponding position of the blood vessel in the first two-dimensional image and a relationship between intensity values at each position of a blood vessel in a two-dimensional image and optical path length at the corresponding position. This method considers the intensity values of two-dimensional images and can calibrate the three-dimensional model of blood vessels to improve the accuracy of three-dimensional models of blood vessels.

Described herein is a medical linear accelerator including an accelerator target structure constructed of a material having a thickness of less than 0.2 radiation lengths, and an accelerator structure to receive an electromagnetic wave and generate an output therapy dose rate of electrons having a beam energy between 4-25 mega-electronvolts (MeV).

Disclosed is a method of radiography of an organ of a patient, including: a first vertical scanning of the organ by a first radiation source and a first detector cooperating to make a first two dimensional image of the organ, a second vertical scanning of the organ by a second radiation source and a second detector cooperating to make a second two dimensional image of the organ, the first vertical scanning and the second vertical scanning being performed synchronously, the first and second images viewing the organ of the patient according to different angles of incidence, wherein there is a vertical gap between the first source/detector and the second source/detector, such that the first vertical scanning and the second vertical scanning are performed synchronously but with a time shift in between, so as to reduce cross-scattering between the first and second images.

Systems and methods for tracking a target volume, e.g., tumor, in real-time during radiation treatment are provided. Under one aspect, a system includes an ultrasound probe, an x-ray imager, a processor, and a computer-readable medium that stores a 3D image of the tumor in a first reference frame and instructions for causing the processor to: instruct the x-ray imager and ultrasound probe to substantially simultaneously obtain inherently registered x-ray and set-up ultrasound images of the tumor in a second reference frame; establish a transformation between the first and second reference frames by registering the 3D image and the x-ray image; instruct the ultrasound probe to obtain an intrafraction ultrasound image of the tumor; registering the intrafraction ultrasound image with the set-up ultrasound image; and track target volume motion based on the registered intrafraction ultrasound image.

A system for constructing fluoroscopic-based three-dimensional volumetric data of a target area within a patient from two-dimensional fluoroscopic images including a structure of markers, a fluoroscopic imaging device configured to acquire a sequence of images of the target area and of the structure of markers, and a computing device. The computing device is configured to estimate a pose of the fluoroscopic imaging device for at least a plurality of images of the sequence of images based on detection of a possible and most probable projection of the structure of markers as a whole on each image of the plurality of images. The computing device is further configured to construct fluoroscopic-based three-dimensional volumetric data of the target area based on the estimated poses of the fluoroscopic imaging device.

The present invention provides an X-ray imaging device including an X-ray emitter and an X-ray detector rotating while facing each other with an imaging subject interposed therebetween, a device controller controlling the X-ray imaging device such that a first X-ray imaging is performed with a first dose in a partial section of a rotation locus of the X-ray emitter and the X-ray detector and a second X-ray imaging is performed with a second dose lower than the first dose in a remaining section, and an image processor producing an X-ray image by receiving first and second X-ray image data of the first and the second X-ray imaging from the X-ray detector.

A method for removing ghost markers from a measured set of medical markers, wherein the measured set of markers represents the positions of real markers and the positions of ghost markers, comprising the steps of: calculating all possible minimal marker sets, wherein a minimal marker set is a subset of the measured set and a minimal marker set consists of the smallest possible number of markers which would cause the measured set to be measured; calculating the smallest extent of each minimal marker set, wherein the smallest extent is the smallest extent among the extents in three orthogonal directions; and selecting the minimal marker set having the smallest out of the smallest extents as a marker set without ghost markers.