Abstract: A method of making a gap between first and second objects have a predetermined value includes steps of introducing light to an entry window on the first object, detecting an intensity of light from an exit window on the first object, and positioning the second object, with respect to a direction concerning the gap, based on an intensity of light detected in the detecting step. The exit window is positioned so that light enters through the entry window of the first object, reflects off the second object, and then enters the exit window of the first object if the gap has the predetermined value.

Abstract: An X-ray CT apparatus capable of imaging a subject based on X-rays of multiple energy levels while using an ordinary X-ray detector includes an X-ray tube which generates X-rays from multiple focal points of different 3-dimensional positions sequentially on a time-division basis, a plurality of filters which implement the filtering individually for the X-rays generated individually from the focal points, a collimator which equalizes the irradiation range of the X-rays generated individually from the focal points, collection means which collects projection data of multiple views of a subject of imaging for the X-rays generated individually from the focal points, and reconstruction means which reconstructs an image based on the projection data. The anode of the X-ray tube has multiple impingement portions where electrons released by the cathode impinge at multiple positions on the trajectory of electrons sequentially on a time-division basis.

Abstract: A cooled radiation emission device has an enclosure in which X-rays are produced. In the enclosure, there is a cathode, an anode situated facing the cathode and rotating on a shaft, and a fixed anode shaft support. The support includes a holding chamber, the shaft of the anode being held in the chamber. The cooling of the tube uses a gallium-indium-tin liquid alloy flow through the anode shaft. This alloy is a conductor of heat and electricity. At the same time as the lubrication of the bearings and the electrical powering of the anode, it provides for cooling of the anode.

Abstract: An apparatus and method for irradiating a product or product stack with a relatively even radiation dose distribution is provided. The apparatus comprises a radiation source, an adjustable collimator, a turn-table capable of receiving a product stack and a control system capable of adjusting the adjustable collimator to vary the geometry of the radiation beam as the product stack is rotated in the radiation beam. Also disclosed is the modulation of the radiation beam energy and power and varying the angular rotational velocity of the product stack in a radiation beam to achieve a low dose uniformity ratio in the product stack.

Abstract: An electron emitter assembly and a method for generating an electron beam are provided. The electron emitter assembly includes a laser configured to emit a first light beam and a second light beam. The electron emitter assembly further includes a mirror configured to move to a first operational position to reflect the first light beam toward a first region of a photo-cathode. The mirror is further configured to move to a second operational position to reflect the second light beam toward a second region of the photo-cathode. The photo-cathode is configured to emit a first electron beam when the first light beam contacts the first region and to emit a second electron beam when the second light beam contacts the second region. The electron emitter assembly further includes an anode configured to receive the first and second electron beams from the photo-cathode.

Abstract: A system for positioning a mammography unit includes a C-arm, an x-ray tube mounted at one end of the C-arm, and a compressor-Bucky assembly mounted at an opposite end of the C-arm. The compressor-Bucky assembly includes a film receptor (preferably a Bucky grid) and a plate-like compressor. The x-ray tube and the compressor-Bucky assembly can be rotated together with the C-arm about a center of rotation. In addition, the x-ray tube and the compressor-Bucky assembly can be rotated independently of one another within the C-arm.

Abstract: An x-ray system HAS adjustable operating parameters with a dependency existing between different auxiliary types of equipment selectable for an examination and a suitable setting of the parameter. A control system of the x-ray system has a data input device to detect the used auxiliary equipment, a data storage device with data concerning the relation between each type of auxiliary equipment and an optimal setting of the parameters therefor, and an adjustment device for automatically adjusting the parameter dependent on the selection of the auxiliary equipment.

Abstract: A motorized adjustable x-ray apparatus has a transmitter operable by AN operator for adjustment of a C-arm and mechanically connected with the C-arm. The transmitter allows adjustment of both an angulation angle and an orbital angle of the C-arm. The speed of the adjustment movement of the C-arm can be selected by actuation of the transmitter.

Abstract: An imaging inspection apparatus which utilizes a plurality of individual imaging inspection devices (e.g., X-ray Computer Tomography scanning devices) positioned on a frame for directing beams onto articles having objects therein to detect the objects based on established criteria. The apparatus utilizes a conveyor which is not physically coupled to the frame having the imaging inspection devices to pass the articles along a path of travel to an inspection location within the apparatus, whereupon the inspection devices direct beams onto the article and the beams are detected and output signals provided to a processing and analysis assembly which analyzes the signals and identifies certain objects which meet the criteria.

Abstract: A radiation condenser system for an X-ray microscope allows for the efficient collection and relay of radiation from a source to the sample. It generates a converging hollow cone of radiation that can be used in the imaging of a sample or target using a zone plate lens. This system comprises a capillary tube for receiving and focusing radiation onto a sample. A center stop is provided for blocking radiation being transmitted along an axis of the capillary tube.

Abstract: A multi-use examination table provides x-ray imaging thereby conserving examination room space and to speed patient examination while retaining standard examination table features such as table extensions, foot end drawers, trays and stirrups, and a step for access to the high examination table surface. A repositionable imaging boom allows the table to remain unobstructed when x-ray imaging is not required.

Abstract: Waveguide grating devices. One includes at least one waveguide having an end, the end having an endface; and a waveguide grating fabricated on the endface, the waveguide grating having at least one waveguide layer and at least one grating layer. The waveguide layer is a separate waveguide from the waveguide on which the waveguide grating is fabricated. Systems for spectral filtering. One, which utilizes a guided-mode resonance effect in a waveguide, includes at least one waveguide having a proximal end and a distal end having an endface; and a waveguide grating fabricated on the end of the waveguide and having a plurality of variable parameters such as permittivity of the grating layer(s) and permittivity of the waveguide layer(s). Methods of forming waveguide grating devices, and methods of detecting one or more parameters of a medium using a waveguide grating device are also disclosed.

Abstract: The invention relates to a device (1) for irradiating tissue, especially tumors. The device comprises one radiation source (2) (accelerator), the primary radiation (6) thereof leading to at least one radiation head (3). The radiation source (2) and radiation head (3) are arranged in a housing and the radiation emitted from the radiation head (3) hits the tissue. A plurality of radiation heads (3) are arranged in a fixed manner in the housing.

Abstract: There is described an X-ray system having at least one component (12, 2, 31, 32) that is shiftable (moveable) or pivotable along at least one traverse path to at least one predeterminable locking position (Bx). Components of this kind are in particular the moving parts of a stand such as the moving parts of a ceiling stand (1), floor stand or wall stand for an X-ray generator (2, 21), and the X-ray generator (2, 21) that is fastened to the stand in such a way as to be capable of being pivoted and extended or retracted. Such components also include the shiftable (moveable) or pivotable top of a patient table and a film cassette that is displaceably or pivotably mounted in the table or on a wall stand.

Abstract: A PET gantry and a CT gantry are placed in parallel such that the CT gantry becomes remoter to a common examination couch having a movable couch table top board mounted with a subject person and the CT gantry is made to be movable. The gantries are controlled by a control portion in a console. At first, the CT gantry is moved in a left direction to separate from the PET gantry so that whole body CT scan is carried out for the subject person in a direction from the leg portion to the head portion. Successively, the subject person is passed through a tunnel portion from the leg portion to the head portion by moving the couch table top board in a right direction in a state of considerably separating the CT gantry from the PET gantry to thereby carry out whole body PET scan.

Abstract: The invention relates to simulating 2D X-ray images from 3D CT data. A user can access a repository of CT data of a patient's anatomy 2 by using a computer network system. The CT data has been obtained by a CT scanning of the patient 1. Firstly, the user retrieves the CT image data 3 and a 3D image is generated 4. Secondly, the user may orient the CT image in any orientation desirable with respect to a virtual X-ray source and a virtual image plane. And thirdly, a 2D X-ray image is simulated 6 from the chosen viewpoint and shown to the user.

Abstract: In the disclosed optical signal processing device, the digital-to-analog conversion of the input optical signals is realized in an optical region, without converting the input optical signals into electric signals for the purpose of signal processing, by splitting input optical signals into plural sets, delaying the split optical signals for mutually different delay amounts while adjusting amplitudes of these optical signals, combining these optical signals, and gating these optical signals on a time axis. It is also possible to realize the processing of the optical signals that are multiplexed on a time axis such as interchanges of time-slots similarly.

Abstract: An X-ray computed tomography apparatus includes a cone beam X-ray tube, an X-ray detector, a rotating mechanism for supporting the X-ray tube and X-ray detector, a moving mechanism for moving the object in the slice direction, a control unit for controlling the rotating mechanism and moving mechanism to execute helical scan operation and move relative to the object, an input device for setting a substantially cylindrical reconstruction area, and an image reconstructing unit for reconstructing image data within the set reconstruction area based on the output of the detector. The apparatus also includes a movement distance determining unit for.determining the movement distance of the X-ray tube and X-ray detector relative to the object on the basis of the radius of the set reconstruction area as well as its height.

Abstract: An object of the present invention is to calculate a more accurate beam-hardening correction coefficient. A phantom having an oblong section or a phantom having an annular (sector) section and a uniform thickness is positioned in an X-ray CT system, and scanned from plural directions in order to acquire a plurality of views. The results of the scan are used to calculate a correction coefficient that is used to correct projection information to be acquired from a subject.

Abstract: A sealed electron beam source (12) for an imaging tube (16) is provided. The beam source (12) includes a source housing (50) with a source window (54) having a first voltage potential and a source electrode (52) having a second voltage potential. The source electrode (52) generates electrons and emits the electrons through the source window (54) to a target (32) that is external to the source housing (50). A method of supplying and directing electrons on the target (32) within the imaging tube (16) is also provided. The method includes forming the source housing (50) over the source electrode (52) and sealing the source housing (50). The electrons are generated and emitted from the source electrode (52) and directed through the source window (54) to the target (32).