摘要:
An X-ray diagnostic arrangement in which a plurality of radiological exposure systems and a common power supply and control panel are provided. The control panel has a control unit for the exposure systems. A selector unit has switching elements for organ programmed setting of exposure values for each exposure system. A manually operated switching unit connects any one of the exposure systems to the power supply and the control unit. Each selectable position of the selector unit corresponds to several exposure value combinations, and a program selector with switching positions is connected to all selectable positions so that one exposure value combination can be selected for each selectable position in each switching position of the program selector. The switching unit for connecting one of the exposure systems to the power supply and the control unit is actuated jointly with the program selector.
摘要:
An X-ray apparatus provides rotationally symmetric, Gaussian-like focal spot distributions. The apparatus may be constituted by an X-ray tube having a glass envelope, a cathode in the form of a filament for providing thermionically emitted electrons and an anode. The anode is of conical shape and can be rotated. The cathode is arranged to be rotated about an axis perpendicular to the plane of the filament and passing through its central point. The apparatus may be constituted by a conventional X-ray tube which is rotatable about an axis coaxial with the central ray of the X-ray field which emerges from the tube. The apparatus may be constituted by a conventional X-ray tube, which is stationary, in combination with a mechanism which effects rotation of the X-ray image receptor and the object being to be examined about an axis coaxial with the central ray of the X-ray field.
摘要:
An electronradiography imaging chamber providing a real time visual image. An electronradiography imaging chamber with electrophoretic particles in the electrode gap, with the particles being selectively moved to a transparent electrode as a result of the electrostatic charge image formed by absorbtion of incoming X-ray radiation in the gap. A dark field illumination viewing configuration with the deposited particles providing light scattering giving a visual image with low radiation dosage. An imaging chamber which can be cyclically operated at a relatively high repetition rate, typically 10 to 20 images per second, thereby providing real time viewing of the object.
摘要:
A radiation limiting shutter device including a hollow, frusto-pyramidal structure having relatively movable walls made of radiation absorbent material and defining an entrance aperture of a desired size, each of the walls comprising a frusto-triangular plate having serrated sloped edges which intermesh with similar sloped edges of respective adjacent plates forming the structure.
摘要:
A nuclear imaging system for mapping a spatially distributed source of high energy nuclear particles from a living organ which has selectively absorbed a radioactive compound in which the nuclear energy is spatially coded by a zone plate positioned between the source and a spatial detector, and a half tone screen is positioned between the source and the zone plate to increase the definition of the image.
摘要:
A solid state spin motor controller responsive to monostable multivibrator circuitry for starting the motor, sensing that the motor has come up to speed properly, and preventing the application of excitation to the anode of the X-ray generator tube in the event the motor has not properly come up to speed or fails to operate continuously.
摘要:
An X-ray detector module includes a plurality of evaluation circuits, coupled to at least one converter circuit, each evaluation circuit including a multiplicity of pixel electronics circuits for processing the electrical signals from the converter circuit pixel by pixel; and a number of forwarding circuits, a forwarding circuit including at least a first data input for receiving a measured data set from a first evaluation circuit and at least a second data input for receiving a measured data set from a second evaluation circuit, or for receiving at least one forwarded measured data set from a further forwarding circuit of the number of forwarding circuits. Each forwarding circuit is constructed to forward the measured data sets that are received by way of the first data input and second data input to a coupled receiving circuit over a common data output.
摘要:
According to an example aspect of the present invention, there is provided a method comprising obtaining a first silicon wafer comprising a mask on a first side, attaching a second silicon wafer on the first side of the first silicon wafer, and etching one of the wafers to partially expose a window layer deposited on the opposite silicon wafer and to leave a structure defined by the mask supporting the window layer.