Abstract: A method for identifying a nano textile, including: (1) determining whether a textile belongs to a woven fabric or a non-woven fabric by appearance; and (2) when the textile is a woven fabric, determining whether the woven fabric is a nano textile according to the surface grains of the woven fabric and a finishing material for the woven fabric; or when the textile is a non-woven fabric, determining whether the non-woven fabric is a nano textile according to the fiber diameter and a fused material of the non-woven fabric.

Abstract: In accordance with at least some embodiments of the present disclosure, a process for enhancing an image is presented. The process may include receiving a first plurality of projections, wherein the first plurality of projections contain computed tomography (CT) data obtained in multiple motion phases and also image data attributable to a first portion of a scanned object. The process may include expanding the first plurality of projections to cover at least the first portion of the scanned object to generate a second plurality of projections. The process may further include generating a phase-correlated image based on a multi-phase image and a phase-correlated difference image, wherein the multi-phase image is reconstructed based on the second plurality of projections, and the phase-correlated difference image is reconstructed based on the first plurality of projections and the second plurality of projections.

Abstract: The present specification discloses a covert mobile inspection vehicle with a backscatter X-ray scanning system that has an X-ray source and detectors for obtaining a radiographic image of an object outside the vehicle. The system is configured to also simultaneously detect passive radiation. The systems preferably include at least one sensor for determining a distance from at least one of the detectors to points on the surface of the object being scanned, a processor for processing the obtained radiographic image by using the determined distance of the object to obtain an atomic number of each material contained in the object, and one or more sensors to obtain surveillance data from a predefined area surrounding the vehicle.

Abstract: Provided is an X-ray generator comprising a cathode for generating electrons; a rotating anode having a cylindrical electron impingement surface, an X-ray focal point being formed by a region in which the electrons impinge upon the electron impingement surface; and a Wehnelt electrode for imparting an electric field to the electrons emitted from the cathode. The Wehnelt electrode has a field formation surface for forming the electric field, and an electron passage aperture formed by the field formation surface. The field formation surface of the Wehnelt electrode is inclined with respect to a plane tangent to an outer circumferential surface of the rotating anode at the center of the X-ray focal point. The center of the cathode is in a plane orthogonal to the field formation surface and aligned with the center of the electron passage aperture.

Abstract: When performing nuclear (e.g., SPECT or PET) and CT scans on a patient, an imaging system (10) includes three or more carbon nanotube x-ray sources (20) are circumferentially spaced along an arc of a rotatable gantry (16) that spans a distance larger than a maximum cross-sectional dimension of a section of a patient (14) to be imaged. The x-ray sources are sequentially pulsed to emit x-rays for scanning a section of a patient (14) including a volume of interest (VOI) (13). Only one source (20) is in an ON state at a time to create a duty cycle, which reduces cooling time for the respective sources as well as radiation dose to the subject. X-rays traversing the patient (14) are received at a flat panel x-ray detector (22) that has a width smaller than the maximum cross-sectional dimension, which further reduces the weight and size of the system (10).

Abstract: A proximity sensor array for a medical imaging system includes a flexible substrate configured to be mounted to a detector, and a plurality of sensors disposed on the substrate, the flexible substrate being deformable to contact a sensing surface of the detector. A method of fabricating a proximity sensor array and a medical imaging system are also described herein.

Abstract: A method and system for visualizing the effects of corrosion are provided. In the context of a method, a workpiece is interrogated with radiation, such as by interrogating the workpiece with x-ray radiation. By relying upon a radiographic technique, the workpiece may be hidden and may be interrogated without disassembly. The method generates a backscatter image of the workpiece based upon radiation backscattered from the workpiece. The method also compares one or more regions of the backscatter image of the workpiece with respect to backscatter images of different metal loss indicators. Each metal loss indicator is representative of a different amount of metal loss. As a result of the comparison, the method estimates the metal loss attributable to corrosion of the workpiece.

Abstract: A radiographic device includes grid frequency component eliminating processing means for eliminating a grid frequency component from an original image detected by a radiation detecting device; wherein said means includes a BPF and an HPF for producing a band-pass grid image and a high-pass grid image from an original image through band-pass and high-pass extraction; a subtracting device for taking the difference between these two grid images; an LPF for producing a difference grid image comprising the grid frequency components not completely extracted by the band-pass, through performing a low-pass processed on the difference image in a direction that is parallel to the grid pattern; an adding device for producing a band-pass+difference grid image by adding the difference grid image to the band-pass grid image; and a subtracting device for subtracting the band-pass+difference grid image from the original image.

Abstract: A system includes acquisition of a three-dimensional computed tomography image of a patient volume at a computed tomography scanner, acquisition of projection images of the patient volume located at an isocenter of a linear accelerator, and determination of a transformation between a coordinate system of the linear accelerator and a coordinate system of the three-dimensional computed tomography image based on the projection images.

Abstract: The present disclosure is directed towards the prevention of high voltage instabilities within X-ray tubes. For example, in one embodiment, an X-ray tube is provided. The X-ray tube generally includes a stationary member, and a rotary member configured to rotate with respect to the stationary member during operation of the X-ray tube. The X-ray tube also includes a liquid metal bearing material disposed in a space between the shaft and the sleeve, a seal disposed adjacent to the space to seal the liquid metal bearing material in the space, and an enhanced surface area material disposed on a side of the seal axially opposite the space and configured to trap within the enhanced surface area material liquid metal bearing material that escapes the seal.

Abstract: An X-ray CT apparatus is provided. The X-ray CT apparatus includes an X-ray tube configured to apply an X-ray onto a subject, a scan device configured to rotate the X-ray tube about the subject to perform an X-ray CT scan, a first control device configured to switch an X-ray output of the X-ray tube from a first level to a second level smaller than the first level when the X-ray tube is placed at a first view angle, and configured to switch the X-ray output from the second level to the first level when the X-ray tube is placed at a second view angle, and a second control device configured to set the first view angle and the second view angle such that an X-ray exposure dose reduced by setting the X-ray output of the X-ray tube smaller than the first level becomes even on right and left sides.

Abstract: The present invention relates to an X-ray examination device and a corresponding method. A fast and periodical modulation of the X-ray flux within each detection interval is performed having a low X-ray flux at the beginning of the detection interval to ensure that no detection channel is overloaded. With increasing the X-ray flux particularly the peripheral detection channels will rum into saturation, which is detected. A saturated detector channel is stopped from further detecting radiation, and the time of effective radiation detection without saturation is measured for correcting those detection signals. From all detection signals, after any correction of detection signals from saturated detection channels, an X-ray image can be reconstructed.

Abstract: Photon-based radiosurgery is widely used for treating local and regional tumors. The key to improving the quality of radiosurgery is to increase the dose falloff rate from high dose regions inside the tumor to low dose regions of nearby healthy tissues and structures. Dynamic photon painting (DPP) further increases dose falloff rate by treating a target by moving a beam source along a dynamic trajectory, where the speed, direction and even dose rate of the beam source change constantly during irradiation. DPP creates dose gradient that rivals proton Bragg Peak and outperforms Gamma Knife® radiosurgery.

Abstract: Systems and methods are described for a compact x-ray system that uses optical energy for triggering x-ray generation rather than a traditional filament. A photocathode is illuminated and the ensuing electrons are directed to an anode resulting in x-ray generation, resulting in increased x-ray source durability. Pulsing, beam forming, scanning, varying x-ray characteristics, longevity of source and other desirable attributes not currently available in the state of the art are achievable, through the use of shaped, multi-materialed photocathodes, shaped, multi-materialed anodes, arrays of optical lines, and so forth, as some examples. Inexpensive, highly controllable sources such as solid-state lasers can be used, permitting a wide variety of applications and power levels.

Abstract: An embodiment of the present invention provides a medical apparatus which displays an image of an object collected by using a first radiography system and a second radiography system, including: an image processing unit adapted to acquire a three-dimensional image; a projection direction input unit used to input a projection direction for at least one of the first radiography system and the second radiography system using the three-dimensional image; an imaging direction setting unit adapted to set an imaging direction for at least one of the first radiography system and the second radiography system based on the projection direction; and an interference checking unit adapted to determine whether interference between the first radiography system and the second radiography system will occur if one of the first radiography system and the second radiography system corresponding to the set imaging direction is moved.

Abstract: According to one embodiment, an X-ray CT scanner includes a gantry unit, a reconstruction unit, an extraction unit, and an output unit. The gantry unit includes an X-ray source and an X-ray detector and is configured to rotate the source and the detector. The reconstruction unit generates reconstruction image data by using data acquired by the detector. The extraction unit extracts, when using a predetermined phantom as the object, pixel values of pixels existing on a locus surrounding a tomographic image of the phantom contained in reconstruction image data generated by the reconstruction unit based on data acquired by the detector. The output unit outputs an extraction result obtained by the extraction unit or information obtained based on the extraction result.

Abstract: A detector circuit can include an integrator having an amplifier, a first feedback capacitor connected between an input and output of the amplifier, one or more additional feedback capacitors connected by at least one switch between the input and output of the amplifier, and a shunt capacitor connected to the output of the amplifier. The shunt capacitor can be selected to have a capacitance value greater than that of a minimum but less than that of a maximum feedback capacitance. The detector circuit can further include a sampling circuit having a sampling capacitor connected to the output of the integrator amplifier through at least one switch, wherein the sampling capacitor is separate from the shunt capacitor. A computed tomography imaging apparatus can include the detector circuit.

Abstract: In an X-ray imaging apparatus that performs X-ray CT imaging, an X-ray generator (13) that generates an X-ray cone beam (BX1) and an X-ray detector (21) that detects the X-ray cone beam (BX1) radiated to an object (specifically, image object (OB)) are revolved for 180 degrees to be opposed to each other with the object being located therebetween. Further, the X-ray generator (13) is moved such that a revolution reference point (CP) that is set on an optical path (CB) of the X-ray cone beam (BX1) goes round of a predetermined oval shape while the X-ray detector (13) and the X-ray generator (21) are revolved for 180 degrees. Setting is made such that a CT image area (CA) to be imaged by the irradiation of the X-ray cone beam (BX1) has an approximately triangular shape through the above-mentioned operation.

Abstract: There are provided an X-ray detector, which can reduce the deformation of a collimator plate and can be easily processed and installed, and an X-ray CT apparatus using it. The X-ray detector includes a collimator plate, and a scintillator array, a photoelectric conversion element array and a substrate that are bonded in order from the X-ray incidence direction. The collimator plate is disposed such that one of a pair of opposite sides of the collimator plate is bonded to a lower support plate bonded on the scintillator array and the other side is bonded to an upper support plate and directions of the opposite sides are the same as a rotation axis direction of an X-ray CT apparatus in which the X-ray detector is provided.

Abstract: In a method and x-ray device to assist in the reduction of the dose of x-ray radiation applied to the patient in the acquisition of at least one x-ray projection of the patient, a selected protocol is entered by a user into an x-ray device, the selected protocol being defined for the acquisition of the at least one x-ray projection and including a measure or measures for reduction of the dose of x-ray radiation to be applied to the patient in the acquisition of the at least one x-ray projection. The does reduction measure or measures in the selected protocol are automatically compared in a processor of the x-ray device, with the dose reduction measures that are installed at the x-ray device for reduction of the dose of x-ray radiation to be applied to a patient in the acquisition of the at least one x-ray projection.