998results about "Diaphragms for radiation diagnostics" patented technology

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 system and method for acquiring in vivo tomographic X-ray scatter data for tissue discrimination of breast tissue. The system includes a coded aperture for spatially encoding X-ray scatter originating from within a patient's breast. Detectors record the modulated scatter signal, which is used to reconstruct a spatially resolved estimate of the X-ray scatter spectra which can then be used to generate spatially resolved tissue type estimates for the user.

An x-ray breast imaging system includes a breast support platform including an x-ray receptor, and an x-ray tube head. The x-ray tube head includes an x-ray source configured to emit an x-ray beam in a direction towards the x-ray receptor, and a collimator. A filter assembly including a plurality of filter slots selectively positionable adjacent to the collimator, and a specimen imaging filter disposed within a slot of the plurality of filter slots. The specimen imaging filter includes at least one aperture defined therein. The specimen imaging filter also blocks a portion of the emitted x-ray beam so that the at least one aperture defines a path of the emitted x-ray beam towards the x-ray receptor.

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.

The invention relates to a computer-implemented method for operating an X-ray device (2) during an imaging process on an object of investigation (1), wherein, from projection images of the object of investigation (1), which are taken in different projection geometries of an X-ray source (4) to an X-ray detector (3) of the X-ray device (2), an image data set is reconstructed in a reconstruction process, which covers a reconstruction area, wherein: - extent information, which describes the extent (10) of the object of investigation (1) in at least one spatial direction (17), is determined from measurement data of at least one measuring means (6), and - the reconstruction process is parameterized depending on the extent information.

An imaging device is provided. The imaging device includes an X-ray tube, a collimator, and a detector. The collimator includes an opening, wherein the collimator has a width in a first direction and a length in a second direction. The opening has 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 has an opening width smaller than that of an opening within the middle section of the collimator.

A method for molecular image acquisition includes beginning acquisition of a molecular image via a molecular imaging system, performing one or more analyses of the molecular image during acquisition of the molecular image to determine whether at least one hot spot is present in the image, and if it is determined that it is statistically significant that there is either at least one hot spot present or there is not at least one hot spot present in the image in any one of the one or more analyses of the molecular image, performing at least one of providing a recommendation that the acquisition be stopped or stopping the acquisition automatically.

Methods and systems for X-ray and fluoroscopic image capture and, in particular, to a versatile, multimode imaging system incorporating a handheld X-ray emitter operative to capture non-invasive images of a target; a stage operative to capture static X-ray and dynamic fluoroscopic images of the target; a system for the tracking and positioning of the X-ray emission to improve safety of obtaining X-ray images as well as improve the quality of X-ray images. Where the devices can automatically limit the field of the X-ray emission.

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.

Versatile, multimode radiographic systems and methods utilize portable energy emitters and radiation-tracking detectors. The x-ray emitter may include a digital camera and, optionally, a thermal imaging camera to provide for fluoroscopic, digital, and infrared thermal imagery of a patient for the purpose of aiding diagnostic, surgical, and non-surgical interventions. The emitter may cooperative with an inventive x-ray capture stage that automatically pivots, orients and aligns itself with the emitter to maximize exposure quality and safety. The combined system uses less power, corrects for any skew or perspective in the emission, allows the subject to remain in place, and allows the surgeon's workflow to continue uninterrupted.

A method and system is disclosed for acquiring image data of a subject. The image data can be collected with an imaging system with at least two different energy characteristics. The image data can be reconstructed using reconstruction techniques.

The X-ray imaging system includes a camera unit, a display unit, an input unit, an exposure assembly, and a control unit. The camera unit is configured to acquire a real-time optical image of a subject under examination. The display unit is configured to display the real-time optical image. The input unit is configured to receive a user operation and to form a target region on the user interface by changing the position of a center of the collimation region. The exposure assembly includes an X-ray source, a detector, and a collimator, the collimator having an opening configured to display a collimation region on the subject under examination. The control unit is configured to control movement of the X-ray source and the detector to align with the center of the target region, and control the opening of the collimator such that the collimation region is aligned with the target region.

The embodiment of the invention discloses a scattering correction method, device and system for X-ray imaging and a medium. The method comprises the steps that for a CT imaging system based on a double-layer detector, an object signal scanned by the CT imaging system for a scanned object is obtained, an anti-scattering grid in the CT imaging system is placed between a low-energy detector and a high-energy detector, and the high-energy detector is arranged between the low-energy detector and the high-energy detector; the object signals comprise low-energy object signals received by the low-energy detector and high-energy object signals received by the high-energy detector, and the high-energy object signals are filtered by the anti-scattering grid; estimating a low-energy direct signal in the low-energy object signal according to the high-energy object signal; and performing CT image reconstruction according to the low-energy direct signal to obtain a low-energy image, and performing CT image reconstruction according to the high-energy object signal to obtain a high-energy image. According to the technical scheme of the embodiment of the invention, rapid scattering correction of CT imaging can be realized.

The invention provides a radiation imaging apparatus. The apparatus comprises: a radiation source configured to emit a radiation beam; a detector configured to receive a radiation beam from the radiation source, the radiation source and the detector defining an inspection channel; and at least one grating disposed on the inspection channel between the radiation source and the detector. The at least one grating is in the form of a cambered surface, or in the form of a groove-shaped surface having a plurality of angled planar segments, the cambered surface or groove-shaped surface facing the radiation source.

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 a method for determining an X-ray image dataset of a target region of an object to be examined, wherein projection images showing the target region are captured by means of an X-ray detector and the X-ray image dataset is reconstructed from the projection images, wherein a first portion of the projection images is captured so as to be collimated onto the target region by the target region being irradiated with X-ray radiation by means of an X-ray device through at least one main radiation opening of a collimator assembly. The invention also relates to a corresponding apparatus for determining an X-ray image dataset of a target region of the object to be examined. The invention generally relates to the field of medical X-ray imaging, in particular with the aim of acquiring projections for reconstructing 2D computed-tomography images.

The invention relates to the technical field of material detection equipment, in particular to an X-ray reciprocal space multi-scale imaging system which is characterized in that an X-ray collimation and grating integration device is used for modulating cone-beam X-rays to obtain fan-beam X-rays; the grating device is used for preliminarily modulating an X-ray small-angle scattering signal generated after the fan-beam X-ray irradiates the sample to be detected; the grating and coding hole integration device is provided with a third grating and a coding hole, and the third grating is used for modulating the preliminarily modulated X-ray small-angle scattering signal again to obtain a modulated X-ray small-angle scattering signal; the coding hole is used for modulating an X-ray diffraction signal generated after the fan-beam X-ray irradiates the sample to be detected to obtain a modulated X-ray diffraction signal; and the detector is used for receiving the modulated X-ray small-angle scattering signal and the X-ray diffraction signal. According to the invention, tomography of the to-be-detected sample can be realized integrally and automatically, and crystal structure and mesoscale information of internal voxels can be obtained efficiently.

The invention provides a static CT (Computed Tomography) device. The apparatus comprises one or more sets of inspection components, each set comprising: a multipoint distributed source configured to emit a beam of radiation; a detector facing the multi-point distributed source so as to receive a radiation beam emitted by the multi-point distributed source, the multi-point distributed source and the detector defining an inspection channel; and a grating disposed on the inspection channel between the multipoint distributed source and the detector. The grating has a periodic structure configured to diffract a radiation beam passing through the grating to form an interference pattern. The invention further provides a CT examination method.

The invention discloses an X-ray imaging system and a machine head thereof. The machine head comprises a bulb tube and a beam limiting device. The beam limiting device is provided with an X-ray limiting device, a reflecting part, an image projection device and an adjusting device, the image projection device can project imaging light, and the imaging light is reflected to the X-ray limiting channel by the reflecting part and penetrates out of the beam limiting device through the X-ray limiting channel to form an image. The image projection device replaces a traditional LED light source, and because the image projection device can form an image, the image formed by the image projection device can comprise a light field used for representing an irradiation area of X rays and light field additional information used for displaying medical auxiliary information in the light field. The light field is imaged by the image projection device and is higher in definition. The light field additional information is beneficial for doctors to know more information during medical operation. The adjusting device is used for adjusting the emitting direction of imaging light of the image projection device so that the light field projected by the image projection device can coincide with the irradiation area of the X-rays.

A computer-implemented method for operating an X-ray device for acquiring projection images of an acquisition area, from which a three-dimensional image dataset of the acquisition area is reconstructed. The X-ray device has an acquisition arrangement with an X-ray generator and an X-ray detector for receiving X-ray radiation of an X-ray field which has a central beam and which is transmitted by the X-ray generator. For acquiring projection images of different projection directions, the acquisition arrangement is moved rotationally to cover a projection angular range encompassing at least 360° about the acquisition area. An opacification device is used that includes an opacification pattern that includes a section opacifying the X-ray radiation with at least two opacifying areas and a section permeable to the X-ray radiation with at least two permeable areas separated by an opacifying area. The opacification device is arranged in the X-ray field between the X-ray generator and the acquisition area such that each voxel to be reconstructed in the acquisition area, and which is opacified in a partial area of the rotation, is scanned by non-opacified X-ray radiation in another partial area of the rotation, that includes at least substantially the same number of acquisition geometries and / or encompasses a 180° angular section with respect to the projection of the projection direction into the plane of rotation.

The invention provides radiation imaging equipment, CT imaging equipment, a radiation imaging method and a CT imaging method. A radiation imaging device includes a radiation source, a detector, and at least one grating disposed between an inspection channel defined by the radiation source and the detector between the radiation source and the detector. And the grating only shields one part of the radiation beam, so that one part of the radiation beam passes through the grating and then is received by the detector.

Methods and systems for X-ray and fluoroscopic image capture and, in particular, to a versatile, multimode imaging system incorporating a handheld X-ray emitter operative to capture non-invasive images of a target; a stage operative to capture static X-ray and dynamic fluoroscopic images of the target; a system for the tracking and positioning of the X-ray emission to improve safety of obtaining X-ray images as well as improve the quality of X-ray images. Where the devices can automatically limit the field of the X-ray emission.

Methods and systems for X-ray and fluoroscopic image capture and, in particular, to a versatile, multimode imaging system incorporating a handheld X-ray emitter operative to capture non-invasive images of a target; a stage operative to capture static X-ray and dynamic fluoroscopic images of the target; a system for the tracking and positioning of the X-ray emission to improve safety of obtaining X-ray images as well as improve the quality of X-ray images. Where the devices can automatically limit the field of the X-ray emission.

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.

An electromagnetic radiation collimator comprising: a radiopaque elongated housing having a first end and a second end, wherein the housing houses an array of parallel radiolucent beam paths, wherein each of the beam paths extend from the first end to the second end, wherein each of the beam paths has an entrance aperture at the first end, and an exit aperture at the second end; the entrance aperture through which source electromagnetic radiation passes into the beam paths, wherein the beam paths emits an electromagnetic radiation beam from the exit aperture when the source electromagnetic radiation beams are in line with the longitudinal axis of the beam path or having a predetermined angle of deviation from the longitudinal axis of the beam path.

According to one embodiment, an X-ray diagnostic apparatus includes an X-ray irradiator, a scatterer, a grid, and a detector. The X-ray irradiator irradiates X-rays. The scatterer is provided between the X-ray irradiator and an object, that scatters the irradiated X-rays. The grid is provided between the scatterer and the object, that transmits the scattered X-rays within a predetermined angular range. The detector detects X-rays transmitted through the object together with an incident angle of the X-rays.

The present invention discloses a static real-time CT imaging system and an imaging method thereof. The system includes two ray source rings and a detector ring; on the Z axis, the left ray source ring and the right ray source ring are arranged on the left and right sides of the detector ring; the left ray source ring and the right ray source ring are respectively annular multi-focus X-ray sources with multiple X-ray sources and the same number of focuses are evenly arranged; the detector ring is composed of multiple X-ray detectors arranged in a ring, and on the Z axis, the multiple X-ray detectors together form a left detector sub-ring, a middle detector sub-ring and a right detector sub-ring; an X-ray source of the left ray source ring is placed between any two adjacent X-ray detectors of the left detector sub-ring; an X-ray source of the right ray source ring is placed between any two adjacent X-ray detectors of the right detector sub-ring; and any two adjacent X-ray detectors of the middle detector sub-ring are in close contact. By using the present invention, a wider Z-direction coverage can be achieved, and cone angle artifacts can be effectively suppressed.

An X-ray irradiation apparatus (100) comprises an X-ray source device (110) for creating X-rays (2) with a polychromatic spectrum and an X-ray optic device (120) with a beam axis (3) that is longitudinal, wherein the X-ray optic device (120) comprises a reflector device (121) that is polycrystalline having a reflector geometry, a reflector mosaicity and a reflector thickness and the reflector device (121) is arranged for receiving a portion of the X-rays (2) within an acceptance angle of the reflector device (121) and for creating an X-ray beam (4) by Bragg reflection, which is directed along the beam axis (3) towards a focal position thereof and has a spectral distribution determined by the polychromatic spectrum of the X-rays (2), the reflector geometry, the reflector mosaicity and the reflector thickness, and wherein the X-ray irradiation apparatus (100) further comprises a spectral filter aperture device (122) that is arranged downstream from the reflector device (121) for creating a filter gap (123) transmitting a first spectral portion (4A) of the spectral distribution of the X-ray beam (4) and blocking a second spectral portion (4B) and a third spectral portion (4C) of this spectral distribution, wherein the first spectral portion (4A) has higher energies than the second spectral portion (4B) and lower energies than the third spectral portion (4C), wherein the reflector device (121) has an acceptance solid-angle of at least 100 micro-steradian, and wherein the reflector geometry, the reflector mosaicity, the reflector thickness and the acceptance angle of the reflector device (121) are selected such that simultaneously a radiation flux in the first spectral portion (4A) is at least 1% of an incoming flux of the same spectral portion of the X-rays (2) received by the reflector device (121) with a peak reflectivity of at least 1%, the first spectral portion (4A) has a spectral bandwidth of at most 15%, the second and third spectral portions (4B, 4C) have a flux reduced by at least three orders of magnitude compared with the flux in the first spectral portion (4A), and the X-ray beam (4) has a focal spot size of less than 1.5 mm in both transverse dimensions relative to the longitudinal beam axis. Furthermore, an X-ray fluorescence imaging apparatus (200) and a method of using the X-ray irradiation apparatus (100) are described.

Computed tomography system comprising an examination area (2) and a static gantry (3), comprising a base frame (4), an annular detector arrangement (6) with detector elements and an annular X-ray source arrangement (5) with X-ray sources, each of which at least partially encloses the examination area (2) and has a substantially common axial direction, wherein the detector arrangement (6) and the X-ray source arrangement (5) are attached or attachable to the base frame (4) from different sides in axial direction, wherein the computed tomography system comprises at least one guide rail (10) which runs essentially in the axial direction and with which an offset of the detector arrangement (6), in particular of individual detector segments (61) of the detector arrangement (6), can be guided in the axial direction, wherein the computed tomography system comprises at least one eccentric disc (45) for installing the detector arrangement (6) in conjunction with at least one guide rail (10).

The present disclosure relates to an apparatus for enhancing contrast sensitivity and resolution in a grating interferometer by machine learning, which can improve both image contrast sensitivity and spatial resolution in a grating interferometer by machine learning, the apparatus including: an image acquisition unit; a numerical phantom generation unit, a convolution layer generation unit to extract features from input data; an activation function application calculation unit that can apply a rectified linear activation function to an output value of the convolution calculation to perform smooth repetitive machine learning; a CNN repetitive machine learning unit that corrects a convolution calculation factor while repeatedly performing forward propagation and backward propagation processes; and an image matching output unit that matches and outputs features extracted by repetitive machine learning of the CNN repetitive machine learning unit.