525 results about "X ray photoemission" patented technology

The present invention relates to a device for simultaneously treating a tumor or cancerous growth with both hyperthermia and X-ray radiation using brachytherapy. The device includes a needle-like introducer serving as a microwave antenna. Microwaves are emitted from the introducer to increase the temperature of cancerous body tissue. The introducer is an inner conductor of a coaxial cable. The introducer contains a hollow core which houses an X-ray emitter. The X-ray emitter is connected to a high voltage miniature cable which extends from the X-ray emitter to a high voltage power source. The X-ray emitter emits ionizing radiation to irradiate cancerous tissue. A cooling system is included to control the temperature of the introducer. Temperature sensors placed around the periphery of the tumor monitor the temperature of the treated tissue.

There is described a system for carrying out and monitoring minimally-invasive interventions with an x-ray device, in which at least one x-ray emitter and a x-ray detector are attached to one or more robot arms of one or more multi-axis articulated-arm robots, with which they are able to be moved for recording images from different projection directions on a predeterminable path around a patient support facility. The system includes a control and evaluation unit with interfaces for catheters and devices for carrying out the minimally-invasive intervention. The control and evaluation unit is embodied for the processing of measurement and/or image data which it receives from the catheters and devices and for control of the catheters and devices for recording the measurement and/or image data. With the proposed system the workflow is covered completely and seamlessly from the examination to the therapy, especially in the treatment of tachycardial arrythmias.

It is described an electron optical arrangement, a X-ray emitting device and a method of creating an electron beam. An electron optical apparatus (1) comprises the following components along an optical axis (25): a cathode with an emitter (3) having a substantially planar surface (9) for emitting electrons; an anode (11) for accelerating the emitted electrons in a direction essentially along the optical axis (25); a first magnetic quadrupole lens (19) for deflecting the accelerated electrons and having a first yoke (41); a second magnetic quadrupole lens (21) for further deflecting the accelerated electrons and having a second yoke (51); and a magnetic dipole lens (23) for further deflecting the accelerated electrons.

There is described an X-ray diagnostic device for performing cephalometric, dental or orthopedic examinations on a patient who is seated or standing. The X-ray diagnostic device comprises an X-ray emitter and an image detector embodied as a flat-panel detector that are arranged situated opposite each other on an orbitally moveable mount. The X-ray diagnostic device further comprises means for adjusting the height of the X-ray emitter and the image detector, a digital image system for recording a projection image using rotation angiography, a device for image processing for reconstructing the projection image into a 3D volume image; and a device for correcting physical effects or artifacts for representing soft tissue in the projection image and in the 3D volume image reconstructed therefrom.

A CT imaging system includes a rotatable gantry having an opening to receive an object to be scanned, a first x-ray emission source attached to the rotatable gantry and configured to emit x-rays toward the object, and a second x-ray emission source attached to the rotatable gantry and configured to emit x-rays toward the object. A first detector is configured to receive x-rays that emit from the first x-ray emission source, and a second detector configured to receive x-rays that emit from the second x-ray emission source. A first portion of the first detector is configured to operate in an integration mode and a first portion of the second detector is configured to operate in at least a photon-counting mode.

An X-ray apparatus has a tube fitted out with an X-ray emitting focus that emits intensities of X-radiation crossing the object for a multiplicity of preliminarily determined main directions of emission, along a path. The apparatus shifts the X-ray tube along a path relative to the object. The apparatus has an X-ray detector that acquires a multiplicity of data of X-ray image data representing the multiplicity of main directions of emission. The apparatus distributes the preliminarily determined intensities of X-radiation non-uniformly on the multiplicity of main directions of emission. The apparatus also processes the multiplicity of data of X-ray image data in order to obtain both a 2D image and a 3D image of the object.

An improved x-ray generation system produces a converging or diverging radiation pattern particularly suited for substantially cylindrical or spherical treatment devices. In an embodiment, the system comprises a closed or concave outer wall about a closed or concave inner wall. An electron emitter is situated on the inside surface of the outer wall, while a target film is situated on the outside surface of the inner wall. An extraction voltage at the emitter extracts electrons which are accelerated toward the inner wall by an acceleration voltage. Alternately, electron emission may be by thermionic means. Collisions of electrons with the target film causes x-ray emission, a substantial portion of which is directed through the inner wall into the space defined within. In an embodiment, the location of the emitter and target film are reversed, establishing a reflective rather than transmissive mode for convergent patterns and a transmissive mode for divergent patterns.

The invention discloses a mobile computed tomography (CT) scanner. The mobile CT scanner comprises a bottom plate platform, a machine frame, a rotary plate, an X-ray emitting source, and a detector and data acquisition system. The bottom plate platform is provided with a linear guide rail; and one end of the machine frame is provided with a guide rail sliding block which is slidably connected with the linear guide rail, and the other end of the machine frame is connected with the rotary plate. The rotary plate can rotate relative to the machine frame. The X-ray emitting source and the detector and data acquisition system are arranged on the rotary plate and are respectively positioned at two ends of the same diameter of the rotary plate. The X-ray emitting source comprises a grid controlled carbon nano tube-based field emission cathode X-ray tube. The invention also provides an operation method for the mobile CT scanner. The mobile CT scanner is simple in structure, low in radiation dosage, and high in imaging quality, and has two purposes.

In continuous radiography, while a patient stands in front of an imaging support, a total image capture field is determined. The total image capture field is divided into small image capture fields. A map scaling section scales up or down a full spine irradiation area map in accordance with the size of the total image capture field. A map dividing section divides the scaled map into small maps corresponding to the small image capture fields. In each division exposure, a detection pixel selector selects one or more detection pixels belonging to an irradiation area defined by the small map, out of all detection pixels distributed in an imaging surface of an electronic cassette. If an integration value of a detection signal from the selected detection pixel reaches a threshold value, X-ray emission is stopped. Division X-ray images obtained by the division exposures are merged into a single continuous X-ray image.

An X-ray inspecting apparatus capable of high-speed inspection of a prescribed inspection area of an object of inspection is provided. The X-ray inspecting apparatus includes: a scanning X-ray source for outputting X-ray; an X-ray detector driving unit on which a plurality of X-ray detectors are mounted, and capable of driving the plurality of X-ray detectors independently; and an image acquisition control mechanism controlling acquisition of image data by X-ray detector driving unit and X-ray detectors. A scanning X-ray source emits X-ray while moving the X-ray focal point of the X-ray source to each of X-ray emission originating positions set for each X-ray detector such that the X-ray passes through a prescribed inspection area of an object of inspection and enters each X-ray detector. Image pick-up by some of the X-ray detectors and movement of other X-ray detectors to an image pick-up position are executed in parallel and alternately. An image acquisition control unit acquires the image data picked-up by X-ray detectors, and a computing unit reconstructs an image in the inspection area based on the image data.

This invention pertains to an x-ray microprobe that can be placed very close the sample surface. A practical implementation is an x-ray target material integrated to an atomic force microscope (AFM) tip and an electron beam is focused to the target materials to generate x-ray emission. This microprobe can be combined with energy-resolved detector or a fluorescence imaging system for material analysis applications.

A system and method providing conformal x-ray brachytherapy for treatment of tumors by irradiation of a target volume of tissue in a patient is disclosed wherein an x-ray probe including an x-ray emitter, an imaging probe configured to image the target volume, a translation stage mounting the x-ray probe for translational motion, a rotation stage mounting the x-ray probe for rotational motion, a support base mounting the x-ray and imaging probes in known relation to each other, and a computer operatively connected to the x-ray and imaging probes and the rotation and translation stages are provided to image and control the operation of the x-ray probe to irradiate the target volume according to predetermined treatment protocols.