Dosimeter for ionizing radiation

Claim 1

A dosimeter for ionizing radiation comprising a casing defining a gas-filled measuring chamber in which there is provided a plurality of anode wires and at least one cathode element and wherein said casing is provided with at least one entry window for ionizing radiation, characterized in that said casing is comprised of essentially rectangularly shaped-frames of insulating material defining an oblong measuring chamber, said frames of insulating material mounted to each other in gas-tight manner and essentially transparent to ionizing radiation, an innermost long edge of each frame of insulating material being provided with a shoulder extending parallel to said plane of said anode wires, each shoulder of said frame supporting a flat cathode element at a distance from said anode wires, said cathode element extending essentially over a length of said oblong measuring chamber and being essentially flat, said cathode element being mounted in at least one of said frames and parallel to a plane of said anode wires, said anode wires are disposed parallelly to one another in said chamber in a plane of separation between said frame over essentially a length of said oblong measuring chamber essentially transverse to said oblong measuring chamber.

Claim 15

An apparatus for slit radiography, which comprises: an X-ray source; an X-ray detector collecting radiation passing through a body to be radiographed; a slit diaphragm positioned between said X-ray source and said body for forming a planar X-ray beam; a plurality of attenuating elements positioned along said slit diaphragm forming a plurality of attenuating sections; means for scanning said body with said planar X-ray beam; a detection member disposed in a path of said planar X-ray beam to measure ionizing radiation comprised of an oblong-shaped casing defining an oblong measuring chamber, a plurality of wire electrodes extending transversely to a longitudinal direction of said oblong-shaped casing, a cathode electrode positioned within said oblong measuring chamber, said electrodes capable of being connected to a source of electromotive force, each of said wire electrodes generating a signal representative of intensity of ionizing radiation, a group of said wire electrodes corresponding to a respective attenuating element; means for moving said detection member in synchronization with said means for scanning said body with said planar X-ray beam; and means for simultaneously controlling each of said attenuating elements during scanning of said body in response to electric signals produced at a respective group of said wire electrodes.

Claim 16

An apparatus for slit radiography, which comprises: an X-ray source; an X-ray detector collecting radiation passing through a body to be radiographed; a slit diaphragm positioned between said X-ray source and said body for forming a planar X-ray beam; a plurality of attenuating elements positioned along said slit diaphragm forming a plurality of attenuating sections; means for scanning said body with said planar X-ray beam; a detection member disposed in a path of said planar X-ray beam to measure ionizing radiation comprised of an oblong-shaped casing defining an oblong measuring chamber, a plurality of wire electrodes extending transversely to a longitudinal direction of said oblong-shaped casing, a cathode electrode positioned within said oblong measuring chamber, said electrodes capable of being connected to a source of electromotive force, each of said wire electrodes generating a signal representative of intensity of ionizing radiation, a group of said wire electrodes corresponding to a respective attenuating element; means for moving said detection member in synchronization with said means for scanning said body with said planar X-ray beam; and means for simultaneously controlling each of said attenuating elements during scanning of said body in response to electric signals produced at a respective group of said wire electrodes.