Abstract: A slit radiography assembly including an X-ray source, and X-ray detector and a slit diaphragm comprised of a plurality of sections juxtaposed in the longitudinal direction of the slit and coacting with controllable attenuation elements wherein: during scanning, a detection assembly includes a plurality of response sections cooperate with the X-ray detector to provide an electric signal representative of the intensity to control the attenuation elements during scanning at initial measuring exposure and subsequent radiographical exposure of the body.

Abstract: An apparatus for slit radiography comprising discrete controllable attenuation elements coacting with a slit diaphragm, each attenuation element being affixed to damping means.

Abstract: A dosimeter for ionizing radiation is of oblong shape. It comprises a gas-filled measuring chamber surrounded by a casing. THe casing is formed of two oblong frames of insulating material that are substantially similar in shape. The two frames are mounted on each other in a gas-tight manner. The anode wires are situated in the plane of separation between the frames and are secured by the frames in contact with each other. At least one of the frames is provided with a cathode over its whole length and parallel to the plane in which the anode wires are situated. Along the edge of the cathode extends a guard electrode which surrounds the cathode with a certain gap. The dosimeter is made of materials that are transparant to the ionizing radiation. It can be used particularly in slit radiography equipment in which the slitwidth can be controlled locally and independently along the length of the slit.

Abstract: A piezo-electric attenuation tongue system for slit radiography equipment comprises a number of tongues placed next to each other. The tongue system is manufactured by slitting a plate of piezoelectric material from one of the edges but leaving unslit a strip of the plate along the opposite edge.

Abstract: An apparatus for slit radiography which comprises an X-ray source and a slit diaphragm through which a body to be examined can be scanned by a planar X-ray fan beam. The slit diaphragm is operatively associated with a plurality of juxtaposed tongue-shaped attenuation elements, which elements are arranged for having their free ends swung to a greater or lesser extent into the X-ray beam so as to effect a local attenuation of the beam. The tongue-shaped attenuation elements form at least one flared configuration as seen from the X-ray source.

Abstract: An apparatus for slit radiography comprising an X-ray source, an X-ray detector positioned behind a body being irradiated, said detector collecting the radiation passed through the body, and a slit diaphragm placed between the X-ray source and the body being irradiated, through which diaphragm there is formed a planar X-ray fan beam, while for obtaining a complete X-ray shadow image of the desired part of the body at least the fan beam performs a scanning movement. There are provided detection means coacting with the X-ray detector and comprising a plurality of sections juxtaposed in the longitudinal direction of the strip-like portion of the X-ray detector irradiated through the slit diaphragm, each section being adapted to produce an electric signal depending upon the radiation impinging instantaneously on the associated section of the X-ray detector.

Abstract: There is disclosed an improved control circuit for a slit radiographic apparatus wherein the slit radiographic apparatus is comprised of an X-ray source adapted to scan a body to be radiographed through a slit diaphragm with a planar fan beam wherein the slit diaphragm is divided into a plurality of attenuating sections each associated with a controllable X-ray attenuating member and wherein there is provided a detection assembly for detecting the intensity of the radiation having passed through the body and divided into sections corresponding to attenuating sections of the slit diaphragm wherein each X-ray attenuating member is controlled by the control circuit including an energizing circuit and a comparison circuit for each attenuating member of the slit diaphragm whereby the comparison circuit compares an output signal of an associated section of the detection means to a reference signal to form an output coupled to the energizing circuit to control the attenuating member of a respective attenuating secti

Abstract: An apparatus for slit radiography comprising an X-ray source by means of which a body being irradiated can be scanned through a slit diaphragm by a substantially planar, fan-shaped X-ray beam, the scanning X-ray beam passed through the body impinging upon an X-ray detector. The apparatus comprises controllable attenuation elements coacting with the slit diaphragm, each element being adapted to influence a sector of the scanning X-ray beam under the control of signals generated by a radiation detector device. The radiation detector device is disposed between the body being irradiated and the X-ray detector. The radiation detector device comprises at least one radiation detector extending at any moment into the scanning X-ray beam passed through the body and moving in synchronism with the scanning movement of the X-ray beam.

Abstract: Apparatus for the non-contact disintegration of concrements present in a body by means of sound shockwaves generated in one focus of at least one liquid-filled reflector formed in a reflector block wherein the reflector exhibits rotary symmetry in the form of a semi-ellipsoid (or in the focal line of a toroidal reflector having a semi-elliptical cross-section configuration) and wherein the reflector focuses the sound shockwaves to a second focus and wherein the apparatus further comprises a liquid-filled coupling member connected to the reflector block in a liquid-tight manner. The liquid-filled coupling member is relatively movable to the reflector and can be placed in contact with the skin of the body.

Abstract: Flat out fanning beams of penetrating radiation in the plane of a slice of an object are bounded on one side by an axis of rotation through the object and extend on the other side past the object exterior. These beams are produced at corresponding angles of the rotation and impinge upon a continuous detector surface which is scanned at each angle to generate half profile signals which may then be processed to produce parallized profile signals.

Abstract: A system for reconstructing a tomogram or a portion thereof of a cross-section of an object. Modified signal profile data obtained by exposing the object to a substantially flat beam of penetrating radiation from different angles and by preprocessing the transmission radiation received at positions respectively corresponding to the different angles of incident radiation is stored in an analogue form into a collection of primary record paths, each of which is uniquely related to an associated angle of incident radiation; whereas such information elements stored in various of said primary record paths as are included in a secondary path that is uniquely defined by position coordinates determinative of the radiation absorption or density of a certain element of the object cross-section, are integrated.

Abstract: A system for synthesizing a radiation divergence correcting operation and a deconvolution operation, for use in a tomographic apparatus, comprising optical storing means for a collection of primary signal profiles in analog form obtained by exposing a subject to a substantially flat, and diverging beam of penetrating radiation from different directions, and collecting the radiation transmission at positions, corresponding to the associated angles of incident radiation; projecting means for sequentially projecting primary signal profiles in an annular region of a memory device; and read out means including a rotating filter for sequentially and in correspondence to a correcting deconvolution function reading out simultaneously all information elements as are stored in different ones of said primary signal profiles and as are included in a particular one of said trajectories.

Abstract: A method and apparatus for pre-processing by means of analogue techniques radiological information obtained by exposing a subject at various spaced positions on one side of this subject to an out-fanning, substantially flat beam of penetrating radiation. The resultant ray transmissions on the other side of the subject are recorded on a record medium as continuous and analogue signals located along a collection of recording paths each having a predetermined trajectory and a spatial orientation related to an associated position of exposure. The radiological information thus recorded is then scanned and read-out along another collection of adjacent scanning paths each having a predetermined trajectory which intersects different recording paths and likewise having a spatial orientation related to the associated position of exposure.

Abstract: An apparatus for tomography, comprising an X-ray or gamma-ray source, at least one detector, and an image reconstruction apparatus. The detector is a spatially two-dimensional, continuous detector large enough to form a complete picture of the projection of the object section thereon, taking into consideration the place of the object section and of the source of radiation relative to the detector. The detector is connected by optical or fibre-optical means to a luminance intensifier tube. This tube may be coupled, either optically or fibre-optically, to a television pick-up tube whose output is coupled to the image reconstruction apparatus. In one form of the invention the detector is an X-ray screen, which is preferably concave towards the source of radiation.

Abstract: The packing has a smooth, tension-proof, plastic and metallic foil arrangement which surrounds a stack of films in a light-proof and weather-proof manner. Two parallel weld seams weld the foil together at the stack edges and a third weld seam extends vertically thereto. The film stack is embraced somewhat loosely between the welds. The foil extends as a holding strip beyond one of the parallel weld seams and as a substantially longer pull strap beyond the other weld seam. A gusset of the foil arrangement disposed between one weld seam and the film stack has a width allowing the gusset to be cut open and off.

Abstract: An apparatus for converting patterns of intensity-modulated scanning lines, each pattern representing an X-ray picture of an object when irradiated by a substantially flat beam of X-rays, into electrical signals, wherein such pattern is projected onto the target of a storage type camera tube having deflection means arranged for scanning said pattern along a plurality of scanning paths, each scanning path extending substantially transverse relative to the longitudinal axis of the image, and information derived from each one of said transverse scanning paths being individually processed.

Abstract: An apparatus for examining an object placed on a support arrangement and located between a source of penetrating radiation and a radiation responsive detector arrangement comprising an image intensifier tube in conjunction with an internal or external continuous detector screen, the combination of said source and said detector arrangement together with adjustable beam collimating means being mounted so as to allow for a rotation relative to the object about an axis extending perpendicularly to a cross-sectional plane of said object, comprising an electronic control arrangement for selectively adjusting the format and/or resolution of a television pattern obtained by scanning the image at the target of a television camera tube and resulting from the projection of the image produced at the output of said detector arrangement, and position selecting means for orientating the position of said support arrangement selectively and in dependence of the adjustment of said electronic control arrangement with respect to