214results about "Diaphragms for radiation diagnostics" patented technology

An x-ray apparatus and method can improve x-ray imaging in a variety of ways. For example, the improve x-ray apparatus can reduce scatter from x-ray images acquired by two-dimensional detectors. An improved 2D x-ray apparatus can provide 3D imaging for medical and / or industrial applications. An improved 2D x-ray apparatus and method can produce separate material imaging, and composition analysis for characterization and correlation of image, densitometry, and composition information of individual component or individual material within a single subject. Non-rotational 3D microscopy, combining 2D or 3D full field x-ray imaging and high resolution 2D or 3D x-ray microscopy or spectral absorptiometry and spectroscopy can achieve a higher resolution and wider field of view in x-ray imaging and quantitative analysis in 3D and real time. The x-ray apparatus can improve tracking and / or surgical guidance in time and / or space.

A dental X-ray imaging system (100) comprises: a dental X-ray imaging unit (102) having an X-ray source part (114), an X-ray imaging detector part (116) with an X-ray detector, and a gantry part (112) for the X-ray source part (114) and the X-ray imaging detector part (116); and a control system (106). The control system (106) controls the parts of the dental X-ray imaging unit (102) to acquire an X-ray scout image (302) of the patient (300) by using a first, larger part of an active area of the X-ray detector, and to acquire panoramic dental X-ray image data of the patient (300) by using a second, smaller part of the active area of the X-ray detector being respective to the panoramic imaging. A method for a panoramic dental X-ray imaging of a patient (300), a computer program (714), and a tangible non-volatile computer-readable medium are also disclosed.

The invention relates to the technical field of X-ray imaging, and discloses an X-ray grating comprehensive imaging information extraction method and system. The method comprises the steps of obtaining and preprocessing original data; acquiring multi-dimensional interference parameters formed by grating phase drift distance, photon statistical noise density and imaging object deformation rate; dynamically calculating a phase correction coefficient, a noise suppression weight and information extraction confidence; phase compensation and noise filtering are executed based on the confidence coefficient, and structure and density information is extracted; parameter changes are monitored in real time, and the extraction process is updated; the system correspondingly realizes the method. The problem of low dynamic scene information precision caused by multi-interference coupling is solved, and the imaging information extraction stability and quality are improved.

Method for selecting a radiation shape filter (200 a , 200 b , 200 c ), which modifies the spatial distribution of the intensity and / or the spectrum of X-ray radiation (R) of an X-ray source (100) of an imaging system (10), consisting of at least one, preferably a plurality of radiation shape filters, wherein - at least one radiation absorption profile, preferably a plurality of radiation absorption profiles of an object under investigation (O), from which image data are to be generated in a later step using the imaging system (10), is recorded parallel to the axis of the object under investigation (z) from different directions, - an effective radiation absorption profile is calculated by averaging the at least one recorded radiation absorption profile. - and the selection of the radiation shape filter (200 a , 200 b , 200 c) based on the effective radiation absorption profile of the object under investigation (O) from a plurality of radiation shape filters (200 a , 200 b , 200 c ).

One exemplary adjustable collimator includes a housing having an aperture through which radiation is directed from an entrance to an exit of the housing, a first shutter 206 and a second shutter 208 within the housing, a first link 222 coupled to the first shutter, and a first yoke 218 coupled to the housing at a pivot point (at 220) and configured to pivot relative to the housing. The first yoke is configured to reduce the effective width of the aperture by moving the first shutter toward the second shutter via the first link when the first yoke is rotated in a first direction (here, clockwise).

To downsize an X-ray diagnostic apparatus.SOLUTION: An X-ray diagnostic apparatus includes an imaging unit, an X-ray filter, and a driving mechanism. The imaging unit includes an X-ray tube for irradiating a subject with an X-ray and a detector for detecting the X-ray radiated from the X-ray tube and passing through the subject. The X-ray filter is disposed between the X-ray tube and the detector, and includes a film formed with a high transmissivity region whose X-ray transmissivity is higher than that of other regions. The driving mechanism moves the high transmissivity region by guiding the X-ray filter in a direction different from a direction that the surface opposed to the X-ray tube faces.SELECTED DRAWING: Figure 2

The invention relates to a computer-implemented method for determining spatially resolved radiation load information of a patient when conducting an examination with an imaging X-ray apparatus having an X-ray radiator for outputting an X-ray field for conducting the examination, wherein patient input dose information is determined for determining the radiation load information, wherein the pre-dose information is determined in the case of use of a matching filter arranged between the patient and the X-ray radiator, which causes a non-uniform dose distribution in a plane perpendicular to a central ray of the X-ray field, the pre-dose information describing a uniform distribution of the X-ray dose acting on the patient without the matching filter; dose distribution information is calculated using the pre-dose information by means of a filter model, which describes at least the dose distribution of the X-ray dose acting on the patient in the part of the X-ray field covered by the matching filter; and the patient input dose information is determined using the dose distribution information.

Provided are a radiography system, an image processing device, an image processing method, and an image processing program that prevent an image of a correction marker from being included in a reconstructed region of a tomographic image obtained by reconstructing a plurality of projection images. A radiography system includes a correction marker that is used to obtain a marker image included in at least one of a plurality of projection images obtained by tomosynthesis imaging, is provided in an irradiation path of radiation in a radiation emitting unit, and is disposed at the position where the marker image is included in a region other than a reconstructed region in the projection image, the reconstructed region being a region used in a case in which the tomographic image is reconstructed from the plurality of projection images among the regions included in the plurality of projection images.

A modular x-ray imaging system includes an application specific module, a base unit in communication with the application specific module, and a mechanical support configured to support the x-ray application specific module. The base unit and application specific module are configured to communicate by wired and / or wireless communication.

X-ray system (2) comprising an X-ray source (4) which, during operation, generates X-ray radiation (10) at several X-ray focal spots (8), - wherein each X-ray focal spot (8) is assigned a collimator (12) which selects the X-ray radiation (10) generated in the respective X-ray focal spot (8) and directed towards a common detector (14), and - wherein the collimators (12) are arranged in a fixed position with respect to their respective associated X-ray focal spot (8).

An X-ray diagnostic apparatus according to the embodiment includes an X-ray tube, an X-ray diaphragm assembly, an X-ray detector, and processing circuitry. The X-ray diaphragm assembly includes an X-ray diaphragm defining an irradiation field of X-rays emitted from the X-ray tube and has a characteristic object. The X-ray detector is configured to detect the X-rays emitted from the X-ray tube and passed through a subject. The processing circuitry is configured to calculate information indicating a relative positional relationship between the X-ray tube and the X-ray detector based on an image of the characteristic object depicted in an X-ray image being based on transmission data acquired by the X-ray detector.

The invention provides a stand column assembly for an X-ray imaging system and the X-ray imaging system. The stand column assembly comprises a base and a stand column which are assembled together. The base is used for being placed on a horizontal supporting face, is fixed relative to the supporting face and is used for supporting an object to be imaged. The stand column comprises a main body part and an X-ray detector, the main body part is rotationally connected with the base and stands up relative to the supporting face, and the X-ray detector is installed on the main body part. In addition, there is a rotation axis perpendicular to the support surface and passing through the base, and the main body portion is rotatable about the rotation axis within a predetermined range relative to the base.

Various methods and systems are provided for a slab phantom set of an imaging system. The imaging system (200) comprises a gantry (322) including a radiation source (302) and a detector (314). A housing (306) is further positioned in the gantry, adjacent to the radiation source. The housing includes a slab phantom set (304) that comprises at least one slab phantom (324, 326). The slab phantom set is configured such that at least one slab phantom of the slab phantom set is independently movable to enable one or more of the at least one slab phantom of the slab phantom set is to be selectively positioned in a path (312) of a radiation beam (308) between the radiation source and the detector.

An operating method of an apparatus according to an embodiment of the present disclosure may comprise the steps of: measuring a reference irradiation field for an effective reception surface; measuring a first irradiation field as X-rays are irradiated, after the positions of two collimators are moved toward the center of the reference irradiation field by a first distance from a reference position of the reference irradiation field; measuring a second irradiation field as the X-rays are irradiated, after the positions of the two collimators are moved toward the center of the reference irradiation field by a second distance from the reference position of the reference irradiation field, the second distance being greater than the first distance; and determining whether the difference between the second distance and the first distance matches the difference between the first irradiation field and the second irradiation field.

An X-ray imaging device is disclosed. The X-ray imaging device of the present disclosure may comprise: a fixed frame; an X-ray generator movably coupled to the fixed frame; a moving assembly for moving the X-ray generator in the horizontal direction; a detector to which the X-ray generator is directed; and a collimator which is disposed between the X-ray generator and the detector, and which has a hole through which X-rays of the X-ray generator pass.

The disclosure relates to a Mobile Fluoroscopic Device consisting of a Mini-C Arm assembly containing a stepless collimating apparatus which is adjustable using pairs of linear translating, opaque to x-ray plates (2). Each pair of plates are operated by a drive mechanism including a motor (3), gears (4, 6), and racks (5) making it possible to increase or decrease the cross-sectional area of the x-ray beam relative to the x-ray sensor surface area.

Systems and methods to monitor output energy of an X-ray source being used to emit a fan beam for scanning an object in a scanning system include a segmented detector positioned between a target of the X-ray source and the object. The segmented detector has at least two segments that are placed to cover at least two angular ranges of the fan beam and generate corresponding two sets of energy distribution data. A ratio is determined based on the two sets of energy distribution data in order to determine an initial electron energy and an end-point energy of the X-ray source based on the ratio.

The invention relates to a multi-lamella collimator with several lamellae for adapting a treatment beam of an irradiation device to the shape of an object to be treated, wherein the lamellae are adjustable relative to the treatment beam along an axis of movement, characterized by an optical measuring device for determining the position of the lamellae on the axis of movement by means of a time-of-flight measurement of electromagnetic radiation signals.

A radiation-based imaging system includes a collimator configured to filter radiation emitted from a target object, the collimator including a plurality of apertures non-uniformly distributed on the collimator. A largest acceptance angle of the plurality of apertures is not larger than 15°. The radiation-based imaging system further includes a detector for detecting the radiation that has passed through the collimator. The collimator is spaced from the detector such that a point on a top surface of the detector that faces the collimator is simultaneously illuminated by two or more of the plurality of apertures.

A system and method for in vivo tomographic tissue imaging using coded aperture x-ray scattering tomography is disclosed. The imaging system includes a coded aperture for spatially encoding x-ray scattering originating from within a patient's body. An x-ray detector array is used to record modulated scatter signals that are analyzed to generate a spatially resolved x-ray scattering spectral reconstruction of the tissue and a spatially resolved scattering tissue image of the irradiated tissue.

This X-ray fluoroscopic imaging device (100) is provided with a top board (2), a top board operation unit (51) and a control unit (31), in which the control unit is configured such that the top board is moved in accordance with an operation input to the top board operation unit in a first control when the movement of the top board is not inhibited, and is also configured such that a center (42a) of an irradiation field (42) of X ray in an X-ray image (41) in a display unit (40) is moved while preventing the movement of the top board in accordance with an operation input to the top board operation unit in a second control when the movement of the top board is inhibited.

An X-ray imaging apparatus 100 comprises an X-ray irradiation unit 1, an X-ray detection unit 2 that outputs an image signal, a collimator 3, a control unit 6, and an image generation unit 4. The control unit 6 switches the output mode of the X-ray detection unit 2 to a first mode, in which the time required for outputting the image signal is relatively long but the visibility of the generated X-ray image 40 is relatively high, when the entire X-ray irradiation range 50 is included in a first region 20a. It switches the output mode of the X-ray detection unit 2 to a second mode, in which the time required for outputting the image signal is relatively small but the visibility of the generated X-ray image 40 is relatively low, when at least a part of the X-ray irradiation range 50 is included in a second region 20b located outside the first region 20a.

An apparatus and a method are provided for determining a collimation configuration in an imaging system. Image data is accessed that is acquired by a two-dimensional (2D) camera of a camera system. The 2D camera has a field of view to capture a scene containing a subject. The image data is obtained prior to the imaging examination of the subject. A machine learning algorithm is applied to the image data to determine a geometry parameter of a target light field of collimation that is expected to be projected onto the subject. The geometry parameter of the light field of collimation is provided for guiding or controlling the adjustment of the geometry of the collimator.

A medical imaging apparatus and a method of operating the same are provided. The medical imaging apparatus comprises: a display device; an input device configured to receive a user input; and a controller configured to: obtain an image by photographing an object; control the display device to display, on the image, a plurality of regions that are target areas for partial photographing operations; select a region from among the plurality of regions based on a first user input received by the input device; control the display device to display, within the selected region, a plurality of Automatic Exposure Control (AEC) markers respectively indicating positions of a plurality of AEC chambers included in an X-ray detector; and set an on / off state of each of the plurality of AEC markers based on a second user input received by the input device.

To provide a dental X-ray imaging system for dental X-ray imaging of a patient.SOLUTION: The system comprises a dental x-ray imaging unit comprising an x-ray source portion, an x-ray imaging detector portion comprising an x-ray detector, and a gantry portion comprising the x-ray source portion and the x-ray imaging detector portion, and a control system. The control system controls the part of the dental x-ray imaging unit to acquire an x-ray scout image by using a first part of the active area of the x-ray detector, and controls the part of the dental x-ray imaging unit to acquire panoramic dental x-ray image data by using a second part of the active area of the x-ray detector corresponding to panoramic imaging. The first portion of the active area is larger than the second portion. The invention also relates to a panoramic dental X-ray imaging method, a computer program and a computer-readable medium.SELECTED DRAWING: Figure 1

SOLUTION: An X-ray imaging apparatus and associated method are provided that receive measured projection data from a wide aperture scan of a wide body-axis direction and a narrow aperture scan of a narrow body-axis direction within the wide body-axis direction and determine an estimated scatter in the wide body-axis direction using an optimized scatter estimation technique. The optimized scattering evaluation technique is based on the difference between the measured scattering in the narrow body-axis direction and the evaluated scattering in the narrow body-axis direction. The kernel-based scatter evaluation / scatter correction approach can be fitted to minimize scatter differences in a narrow body-axis direction. Thereafter, the fitted (optimized) kernel-based scatter evaluation / correction is applied to the wide body-axis direction region. Optimization may occur in the projection data domain or in the reconstruction domain. An iterative process is also utilized.SELECTED DRAWING: None

The invention concerns an apparatus comprising a collimator configured for collimate electromagnetic radiation emitted from an X-ray source, a sensor configured for acquiring data of an anatomy of a patient, and a processing unit. The processing unit is configured to calculate an optimal collimation position of the collimator based on the acquired data of the sensor, determine a movement of the collimator based on the calculated optimal collimation position, wherein the movement of the collimator comprises a rotation of the collimator around a central axis of the collimator. The invention further concerns an X-ray system comprising the apparatus and a method for moving a collimator for collimate electromagnetic radiation emitted form an X-ray source.

The invention relates to the technical field of SPECT systems, and discloses an intelligent vehicle-mounted SPECT system which comprises a vehicle chassis, a lower-layer compartment type room is arranged on the vehicle chassis, an upper-layer compartment type room is arranged on the lower-layer compartment type room, and a collimator replacement mechanism is arranged below the vehicle chassis; l-shaped magnetic bases are arranged at the positions, corresponding to stators of the first linear motors, of the two ends of the rotating rod. The two L-shaped magnetic bases and the two magnetic bases form a magnetic adsorption base, and a detachable collimator is arranged on the magnetic adsorption base; according to the invention, the collimator is lifted out from the collimator replacement port through the lifting assembly, the collimator is replaced from the L-shaped magnetic base, and after the collimator is replaced, the collimator is automatically retracted into the protective cover through the lifting assembly, and the collimator is rotated to a horizontal state; and then the examining table is reset to recover to a normal state, so that different collimators can be replaced according to requirements, and the use is convenient.

An x-ray imaging apparatus 10 comprising a support 30 having two arms, wherein on one arm an x-ray emitter 50 is arranged, and on the other arm a flat panel digital detector 60 is arranged, the emitter and detector arranged opposite each other providing a space therebetween for the positioning of an object for x-ray imaging by the apparatus, the x-ray emitter comprising an array of emitters, the apparatus arranged such that in use different emitters are energisable independently from one another such that 3-dimensional tomosynthesis images are obtainable of the object, with the object, emitter and detector maintained stationary relative to one another.