204 results about "X ray examination" patented technology

The present invention provides a multi-view X-ray inspection system. In one embodiment, a beam steering mechanism directs the electron beam from an X-ray source to multiple production targets which generate X-rays for scanning which are subsequently detected by a plurality of detectors to produce multiple image slices (views). The system is adapted for use in CT systems. In one embodiment of a CT system, the X-ray source and detectors rotate around the object covering an angle sufficient for reconstructing a CT image and then reverse to rotate around the object in the opposite direction. The inspection system, in any configuration, can be deployed inside a vehicle for use as a mobile detection system.

The stereotaxic images being digitized, a target pixel in a target region of interest is selected, a target window of chosen dimensional characteristics and containing the said target region of interest is generated around the selected target pixel, a set of pixels is determined in a second image, according to a predetermined selection criterion, a second window, of the same dimensional characteristics as the said target window, is generated around each selected pixel, a correlation processing between the grey-scale levels of the pixels of each second window and the grey-scale levels of the pixels of the target window is carried out so as to obtain a correlation value for each second window, and the region of interest homologous to the target region of interest is identified on the basis of the analysis of the set of correlation values thus obtained, so as to minimize the risks of matching error between the homologous regions of interest. The element of interest is then located on the basis of the positions of the two homologous regions.

In a method and device for positioning the level of a slice during the generation of a slice exposure of an examination subject with an x-ray examination device, a reference image of the exterior of the examination subject is recorded by a camera on a line of sight proceeding transverse to the direction of examination. The slice level of a subsequent slice exposure is determined using a slice level marking within the reference image.

An X-ray inspection system is mounted around conveyor (2). An X-ray source (12) and a number of X-ray detectors record X-ray images of an object (8) such as baggage moving along the conveyor. A visual recordal system (18,22) tracks the motion of the object along the conveyor to identify the location and orientation of the object as it moves along the conveyor. A tomosynthesis image of the object is calculated from the plurality of X-ray images using the location and orientation information from the visual recordal system.

The invention provides an X-ray examination apparatus for processing high-speed examination to object in specified examination region. The X-ray examination apparatus includes a scanning X-ray source for outputting X-rays, a sensor base which is attached with a plurality of X-ray sensors and which rotates about a rotation axis, and an image acquiring control mechanism for controlling rotation angle of the sensor base and acquisition of image data from the X-ray sensors. With respect to each X-ray sensor, the scanning X-ray source moves the X-ray focal position of the X-ray source to each starting position of the X-ray emission set so that the X-ray transmits through a predetermined examination area of an examination target and enters each X-ray sensor, and emits the X-rays. The image control acquiring control mechanism acquires image data detected by the X-ray sensors, and a calculation unit reconstructs an image of the examination area based on the image data.

An X-ray system has a patient examination table, an image acquisition unit under the surface of the patient examination table, and an X-ray radiator that can be positioned above the patient examination table, On the patient examination table a radiation protection device is disposed, which—during the operation—shields at least one zone on one side of the patient examination table from the radiation area between the X-ray radiator and the image acquisition unit. In addition, on the patient examination table an X-ray system operation unit is disposed that is accessible from the shielded zone.

In an x-ray apparatus and method to determine the radiation dose in x-ray examinations, the x-ray apparatus has an x-ray radiator, an automatic exposure timer, and a laser range finder to detect the focus-patient separation between the x-ray radiator and a patient, and a computer device determines the necessary radiation dose using the thickness of the body part of the patient to be examined. The thickness is calculated from the acquired focus-patient distance and geometric data of the x-ray apparatus.

The present invention relates to an examination apparatus and a corresponding method to realize a Spectral x-ray imaging device through inverse-geometry CT. The proposed examination apparatus comprises: an X-ray source unit (14) comprising a plurality of X-ray sources (15) for emitting X-rays (24) at a plurality of locations, an X-ray detection unit (18) for detecting X-rays emitted from one or more of said X-ray sources (15) after penetration of an examination area (19) between said X-ray source unit (14) said X-ray detection unit (18) and for generating detection signals, a processing unit (36) for processing the generated detection signals, and—a control unit (26) for controlling said X-ray sources (15) to subsequently, alone or in groups emit X-rays at least two different energy spectra such that in the time interval, during which a particular X-ray source (15a) or said group of X-ray sources (15a,15d, 15g), is switched over to emit X-rays at a different energy spectrum, said particular X-ray source (15a) or said group of X-ray sources (15a, 15d, 15g) is switched off and one or more other X-ray sources (15b, 15c) or groups of X-ray sources (15b, 15e, 15h; 15c, 15f, 15i) are subsequently switched on to emit X-rays.

An X-ray detector (5) comprises an X-ray-electric charge conversion film (21) for directly converting into charges an incident X-ray that has passed through a subject (2) and is received, and a charge information reading section (15) for detecting charges produced by the X-ray-electric charge conversion film (21) as image signals. The X-ray-electric charge conversion film (21) consists essentially of a rare-earth compound containing at least one of rare-earth element and at least one of element selected from oxygen, sulfur, selenium and tellurium. The X-ray-electric charge conversion film (21) does not adversely affect human bodies and environment, and is excellent in sensitivity, film-forming feature and the like. Accordingly, the X-ray detector (5) which is provided with the improved X-ray detection sensitivity, detection accuracy and the like with environmental loads and the like decreased can be provided.

Methods and systems for x-ray inspection of an object using pulses whose spectral composition varies during the course of each pulse. A temporal sequence of pulses of penetrating radiation is generated, each pulse characterized by an onset and by a spectral content that evolves with time subsequent to the onset. The pulses are formed into a beam that is scanned across the object. The penetrating radiation from the beam that has traversed the object is detected, generating a detector signal. The detector signal is processed to derive at least one material characteristic of the object, such as effective atomic number, on the basis of temporal evolution of the detector signal during the course each pulse of the sequence of pulses. The detector signal is separately acquired for multiple time intervals relative to the pulse onset, and processed to obtain values corresponding to multiple-energy analysis of the transmitted radiation. The time intervals may be predetermined, or else adapted based on features of the detected signal.

An x-ray apparatus has an exposure unit with an x-ray radiator and a diaphragm in front thereof, and a camera system with which an adjustment image is acquired of a subject positioned in front of an x-ray exposure plane. Using the adjustment image, a region to be examined of the subject is identified and an area of the x-ray exposure plane is selected such that the projection of the region to be examined of the subject is substantially inscribed in the projection of the areal section. The diaphragm is adjusted such that the x-ray radiation generated by the x-ray radiator is incident on the x-ray exposure plane only within the selected areal section.

The invention relates to a method for repairing a high-temperature alloy thin-walled cartridge receiver part through precision pulse welding. The method comprises the following steps: according to the length and position of the flaw of the thin-walled cartridge receiver part, analyzing the failure mode and the stress state of the part in combination with a numerical simulation technique; before welding, carrying out precision measurement on the front and rear mounting edges and other related sizes of a cartridge receiver; determining the position and size of the flaw by using X-ray examination and dyeing examination; carrying out pre-welding technical preparation; adopting a special welding protecting tool according to the position to be repaired; in combination with the failure mode and the stress state of the part, on account of the position and the size of the flaw, determining a single pulse or continuous pulse mode, welding technical parameters and welding order technical factors so as to reduce the stress level of the part after welding; and carrying out welding by a welding repairing technology determined in the above step. The method has the advantages that the weld joint performance reaches more than 90% of base metal performance, and standard requirements are met; and after welding, the radial run-out of the inner and outer mounting edges of the cartridge receiver is smaller than 0.08mm, the end surface run-out is smaller than 0.10mm, and assembling requirements are met.

The invention discloses a method for manufacturing a high-strength X90 steel grade spiral submerged arc welded pipe. The method comprises the following steps of: uncoiling; leveling; edge milling; pre-springing; forming; inside welding; outside welding; pipe end diameter expansion; layering and ultrasonic examination of a base material; X-ray examination of a welding seam; hydrostatic test; ultrasonic examination of the welding seam; and pipe end chamfering. By increasing the processes of double edge milling, edge pre-springing and pipe end diameter expansion in the processing steps, the manufacturing method successfully solves the technical problems of poor forming stability, the difficulty for the performance of the welded joint to meet the technical requirement and the like during the manufacturing of the high-strength X90 steel grade spiral submerged arc welded pipe.

A molded plastic spine board having specialized padding strategically located in the board and stiffing members. The specialized padding reduces patient discomfort and aids perfusion in the regions that are in contact with the board while the patient is immobilized on the board thereby helping to prevent tissue ischemia and pressure ulcer formation. The stiffening members strengthen the board eliminating deflection of the board thereby keeping the patient immobilized while eliminating artifacts (shadows and interference) in x-rays thereby ensuring good x-ray examination.

X-ray inspection of moving cargo based on acquiring multiple image lines at one time or substantially at one time. An X-ray source with multiple-beam electron beam targets creates multiple parallel X-ray fan beams. X-ray inspection systems and methods employ such multiple-beam sources for purposes of inspecting fast moving cargo.

In an X-ray system and method to determine the effective skin input dose in x-ray examinations, the skin input dose is obtained by dividing the measured dose area product by the exposed skin input area, which is calculated from the exposed area in the film or image intensifier plane, geometric data of the x-ray system, and the thickness of the body part of the patient to be examined. The water equivalent determined from the setting values for the irradiation is used as the value for the thickness of the body part to be examined.

An X-ray examination station includes a first source of X-ray radiation for whole body scanning of a human body using a first fan beam of X-ray radiation; a first vertical linear radiation detector configured to detect the first fan beam; a second source of X-ray radiation installed at mid-height of a person being examined, for scanning a central portion of the human body using a second fan beam of X-ray radiation; a second vertical detector of X-ray radiation configured to detect the second fan beam; and a control unit configured to turn on each of the X-ray radiation sources. The first and the second radiation fan beams are emitted in parallel planes. The first X-ray radiation source is turned on for the whole body scanning. The second X-ray radiation source is turned on for scanning the central portion of the body.

The invention discloses a method for manufacturing a low-cost high-toughness X70 steel spiral submerged arc welded pipe. The processing process of the method comprises the following steps of: uncoiling; leveling; milling an edge; pre-bending; forming; performing internal welding; performing external welding; expanding diameter at a pipe end; performing layered ultrasonic examination on a base material; performing weld joint X ray examination; performing a hydrostatic test; performing weld joint ultrasonic examination; chamfering the pipe end; and examining a finished product, wherein an bevel angle in the edge milling step is 70-80 degrees, and the bevel depth is 3-4 mm. Mo, Ni and Cu are not added into the base material adopted for manufacturing the low-cost high-toughness X70 steel spiral submerged arc welded pipe, and the content of alloy elements of Nb and the like is reduced, so that the production cost is reduced; in addition, by optimizing a forming process and a welding process, the manufactured spiral submerged arc welded pipe has the superior performance of low-temperature impact resistant toughness.

The invention relates to a combination device of detector and collimator for X-ray examination and a method. The combination device comprises a plurality of detectors, an arc supporting arm and a grid collimator, wherein the arc supporting arm is provided with a gap running through the inner side and the outer side along an arc direction; the grid collimator comprises a plurality of grids; the plurality of detectors are arranged at the outer side of the arc supporting arm along the arc direction; the grid collimator is arranged at the inner side of the arc supporting arm along the arc direction; and the corresponding detectors and the corresponding grids are aligned along a direction directing to the circle center of the arc supporting arm through the gap of the arc supporting arm. The combination device can improve the efficiency and the reliability of the grid collimator and can also solve the problem that detector modules cannot be disassembled and assembled independent of the gridcollimator.

In a data processing apparatus, image data are calculated based on photon counts of an X-ray beam transmitted through an object. Based on the image data, X-ray attenuation information is calculated. The attenuation information includes i) inherent information inherently depending on a type or a property of the object, the inherent information being indicated by a quantity of a vector in an n-dimensional coordinate whose dimension is equal in number to the n-piece energy ranges; and ii) associated information being associated with the inherent information and depending on a length of a path along which the X-ray beam passes though the object. From the attenuation information, only the inherent information is produced which is independent of the associated information. Scattering points corresponding to the inherent information are calculated to be mapped in the n-dimensional coordinate or in a coordinate whose dimension is less than the n-dimensional coordinate.

The present invention provides a polyethylene glycol-electrolyte oral solution. Its is made up by using 59-60 g of polyethylene glycol, 1.0-1.5 g of sodium chloride, 0.5-1.0 g of potassium chloride, 1.5-2.0 g of sodium hydrogen carbonate, 5.5-6.0 g of sedium sulfate, 0.02-0.5 g of egtazide, 0.02-0.5 g of sweetener and 1-2 ml of edible essence, and adding deionized water to 1000 ml. It mainly is applicable to colonoscopy, barium enema X-ray examination and intestinal tract ablution, etc. and also can be used for curing chronic constipation.

The invention discloses an individualized guiding template assisting in setting a pedicle screw into a small incision. The individualized guiding plate comprises at least one group of pedicle screw setting components, each pedicle screw setting component comprises two bottom plates arranged on two sides of a spindle section to be set with a screw symmetrically and two screw feed catheters fixed on the bottom plates respectively, the structures of the bottom plates are matched with the spindle anatomical structure around a point to set the screw, the screw feed catheters are determined by screw setting channels through reasonable calculation and connected on the bottom plates. The bottom plates are connected with the screw feed catheters determined by the screw setting channels through reasonable calculation, accuracy in screw setting and safety in operation can be guaranteed without X-ray examination, and ray exposure of medical staff and patients is reduced.

An X-ray inspection apparatus includes a scanning X-ray source for emitting an X-ray, an X-ray detector drive unit having a plurality of X-ray detectors mounted thereon and being capable of independently driving the plurality of X-ray detectors, and an image acquisition control mechanism for controlling the X-ray detector drive unit and acquisition of image data from the X-ray detectors. The scanning X-ray source emits an X-ray by moving an X-ray focal point position of the X-ray source to each of originating point positions of X-ray emission, which are set for the X-ray detectors such that X-rays are transmitted through a plurality of prescribed inspection areas of an inspection object and enter the X-ray detectors. Image pickup by the X-ray detector and movement of another X-ray detector are concurrently performed in an alternate manner. The image acquisition control mechanism acquires image data, and an operation unit reconstructs an image.

The present invention relates to X-ray examinations and to the improvement of patient safety during such. More specifically the invention relates to X-ray diagnostic compositions having low concentrations of iodine and an optimized amount of electrolytes. The invention further relates to methods of X-ray examinations wherein a body is administered with an X-ray diagnostic composition comprising a low concentration of iodine and irradiated with a radiation dose.

To enhance image acquisition and speed up the examination during x-ray examinations, the present invention relates to an X-ray apparatus for three dimensional imaging and in particular for tomosynthesis examination, comprising a means for obtaining a set of projection images of a body part, a reconstruction means for reconstructing a three-dimensional image volume, memory for storing the projection images, and a control means. The reconstruction arrangement is arranged to reconstruct a three-dimensional image volume from data in the projection images in the memory, the reconstruction arrangement being arranged to reconstruct a first and a second image volume, wherein the second image volume is reconstructed having lower resolution than the first image volume.