449results 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.

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 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.

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.

A radiographic imaging apparatus and a radiation detector are provided, which are capable of sufficiently reducing the sensitivity difference between pixels even if the incident photon rate is high. A radiographic imaging apparatus includes: a radiation source for irradiating an object with radiation; a plurality of detection element modules each having a semiconductor layer that generates electrical charges depending on photon energy of the radiation, and a photon counting circuit for counting the electrical charges for each pixel; and a collimator that is disposed between the radiation source and the semiconductor layer, and has a plurality of walls forming a plurality of passage holes through which the radiation passes. A plurality of subpixels is formed on the semiconductor layer, and when one or more subpixels defined by the walls of the collimator are grouped as a macro pixel, a plurality of macro pixels arranged from each end of each of the detection element modules is smaller in size than a macro pixel other than the plurality of macro pixels arranged from the end of the detection element module.

For particularly rapid and effective scattered-radiation correction of 2D X-ray images, a method is provided for scattered-radiation correction for an X-ray image or a series of X-ray images, which images may be acquired by an acquisition system having an X-ray source, an X-ray detector, and a collimator that shapes the primary X-ray radiation. The method includes: providing the X-ray image acquired in a first setting of the collimator in which setting the object under examination is illuminated; providing an auxiliary X-ray image acquired in a second setting of the collimator in which second setting are illuminated, in particular solely one or more sub-regions of the X-ray detector; subtracting the auxiliary X-ray image from the X-ray image; determining a scattered-radiation correction using image data from the X-ray detector obtained from the subtraction at least in the region of the sub-regions; and correcting the X-ray image using the determined scattered-radiation correction.

The collimator (3) for a radiological equipment (1) comprises shielding means (6, 7, 9, 10, 11) made of tungsten-based radiation-absorbent plastic material; such means may be proximal radiated field closure elements and / or radiated field propagation elements; such means comprise at least one radiated radiogenic field propagation element (6).

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 ).

The present invention belongs to the field of X-ray CT systems, and in particular relates to a z-position adjustment tool for a CT system and an adjustment method thereof, comprising an X-ray shielding plate, an X-ray transmission window for transmitting X-rays, a shielding plate frame for supporting the X-ray shielding plate, and a horizontal position fine-adjustment mechanism for adjusting the horizontal position of the X-ray shielding plate. One side of the shielding plate frame is provided with a support frame for fixing to a patient bed frame, and the support frame and the shielding plate frame are connected by a pitch angle fine-adjustment mechanism for adjusting the pitch angle of the X-ray shielding plate. The present invention adjusts the detector and the X-ray generator to the same vertical plane through an adjustment tool. The present invention has low cost, simpler operation, more accurate results, reusability, simpler and more reliable installation and fixation of the detector, a high degree of automation, and better image quality, especially for multi-segment heart scans and three-dimensional reconstruction images.

Computed tomography system comprising an examination area (2) and a static gantry (4) comprising a detector ring (6) and an X-ray source ring (8), each enclosing the examination area (2) and having a substantially common axial direction, wherein the X-ray source ring (8) has a larger diameter than the detector ring (6) such that, viewed radially, the X-ray source ring (8) is arranged further out around the examination area (2) than the detector ring (6), wherein the detector ring (6) is arranged axially offset from the X-ray source ring (8) such that a beam exit aperture (9) of the X-ray source ring (8) is at least partially not obscured by the detector ring (6) when viewed radially towards the examination area (2).

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

This invention provides a cascaded imaging diagnostic and therapeutic integrated system, relating to the field of imaging. The system includes: a gantry, a slit collimator, a detector ring, and a base. The gantry is a hollow, regular prism. The slit collimator is mounted on the inner side wall of the gantry; the detector ring is mounted on the outer side wall of the gantry; the side wall of the gantry is mounted on the base. When a living organism to be detected is transferred into the cavity of the gantry, the detector ring images the target position within the organism through the slit collimator. The living organism carries a drug containing a nuclide that supports the emission of cascaded photons. The detector ring is connected to a host computer. This invention can collimate and detect "cascaded gamma photon pairs," thereby directly locating the nuclide decay position, achieving real-time imaging, short imaging time, and avoiding the defects of traditional nuclear medicine image reconstruction.

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.

To provide an information processing device, a radiographic image capturing system, an information processing method, and a program capable of assisting determination on whether a specific site of a subject is included in a radiation irradiation range.SOLUTION: An information processing device includes at least one processor. The processor recognizes a specific site of a subject from an optical image taken of the subject, derives a distance to the recognized specific site using a distance image taken of the subject, and derives a radiation irradiation range in a position in an irradiation axis direction corresponding to the derived distance.SELECTED DRAWING: Figure 6

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.

The invention relates to a device for receiving a beam path assembly for X-ray radiation, the device having a base plate through which a through-hole for X-ray radiation passes, and a sheet metal part having a base part and a cover, the base part extending in a plane in the base plane of the sheet metal part, the sheet metal part being curved, and the cover being arranged in the base plane of the sheet metal part. The sheet metal part is fixed relative to the base plate by mutual pressing of the base and the plane of the base plate such that the cover shields the ambient region of the base plate against scattered beams of X-ray radiation directed from the edge region of the through-hole to the ambient region of the base plate.

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.

The invention relates to a dental X-ray imaging system (100) for dental X-ray imaging of a patient (300). The system (100) comprises: a dental X-ray imaging unit (102) comprising: an X-ray source portion (114), an X-ray imaging detector portion (116) comprising one X-ray detector, and a gantry portion (112) comprising the X-ray source portion (114) and the X-ray imaging detector portion (116); and a control system (106). The control system (106) is configured to: control the portion of the dental X-ray imaging unit (102) to acquire an X-ray localization image (302) of the patient (300) by using a first portion of an active area of the X-ray detector; and control the portion of the dental X-ray imaging unit (102) to acquire panoramic dental X-ray image data of the patient (300) by using a second portion of the effective area of the X-ray detector corresponding to panoramic imaging. The first portion of the active area is larger than the second portion of the active area. The invention also relates to a method for panoramic dental X-ray imaging of a patient (300), a computer program (714) and a tangible non-volatile computer readable medium.

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.

According to an exemplary embodiment of the disclosure, an imaging system and method is provided for determining the need for generation of enhanced diagnostic images of a patient. The imaging system includes a radiation source operable at to emit radiation at multiple energy levels, a detector alignable with the radiation source, a controller operably connected to the radiation source and detector to generate image data in an imaging procedure, and a computer aided detection (CAD) system configured to analyze low energy (LE) images to locate regions of interest (ROI) and / or other triggering attributes, characteristics or findings within the object. Upon locating one or more triggering attributes, characteristics or findings within the LE images, the system and method can acquire one or more high energy (HE) images of the object, and can process the one or more LE images and the one or more HE images to form enhanced diagnostic images.

A computer-implemented method for adjusting the position of an object during medical imaging includes receiving (S10) a first image 20 of a region of interest 14, 16 of the object; determining (S20) first positioning data based on the first image 20, the first positioning data indicating an alignment of the region of interest 14, 16 with respect to a first image acquisition unit used to acquire the first image 20; determining (S30) guidance data based on the first positioning data, the guidance data including guidance from a current alignment state to a target alignment state for the region of interest 14, 16 with respect to a second image acquisition unit used to acquire a second image 60, the target alignment state corresponding to the alignment state derived from the first positioning data; and providing (S40) the guidance data for acquiring the second image 60.

The present invention relates to the technical field of digital X-ray imaging methods, and discloses an imaging device using slit scanning, comprising: a transmitting end for collimating X-rays into slit X-rays, continuously transmitting slit X-rays to an object to be imaged, and allowing the object to be imaged to be completely captured by the slit X-rays in a linear manner; and a receiving end for automatically activating a slit region of interest corresponding to the slit X-ray emission direction on the receiving end after each transmitted slit X-ray passes through the object to be imaged, acquiring the attenuated slit X-rays, converting them into slit images with the same range as the slit X-rays for storage, and splicing the slit images after they are completely captured. By collimating X-rays using slit scanning, the magnification effect of point light source imaging is avoided, and the device can be used to acquire images of a patient in true proportion. Furthermore, the radiation dose received is much lower than that of spiral scanning, being at the level of ordinary radiation.

Provided are a collimator, a radiation detection device, and a radiation inspection device that are capable of further removing scattered radiation. This collimator 20 comprises: a radiation blocking section 22; and a radiation transmission section 21 that has a lower radiation blocking rate than the radiation blocking section 22, penetrates the radiation blocking section 22, and is solid. The X-ray transmission section 21 of the collimator 20 is solid therefore X-rays on the low-energy side that have been scattered by a subject B in the X-ray transmission section 21 are absorbed, as a result of this collimator 20. Accordingly, there is little noise contained in X-rays detected by a radiation detection element 30 and a high-resolution X-ray image can be obtained.

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.

The present invention discloses a pedal self-locking mechanism, comprising a pedal fixing seat, a rod fixing seat, a pedal rod and a locking rod, wherein the rod fixing seat is fixedly connected to the pedal fixing seat; the pedal rod is slidably connected to the pedal fixing seat and the rod fixing seat, and the pedal rod is connected to an unlocking rod; the locking rod is slidably connected within the pedal fixing seat and the rod fixing seat, a limited locking rod is provided on the locking rod, the limited locking rod is slidably provided on the rod fixing seat, the limited locking rod switches between the locked and unlocked positions of the rod fixing seat, the driving end of the unlocking rod is correspondingly provided with the end of the limited locking rod, and when the driving end of the unlocking rod drives the limited locking rod, the limited locking rod switches from the locked position of the rod fixing seat to the unlocked position, and the locking rod is connected to the pedal rod. In the pedal self-locking mechanism of the present invention, the locking and unlocking of the mechanism need to be driven by the same structural member of the pedal, the driving structure is more simplified, manual operation is not required, the operation is simple, and the use is convenient.