Abstract:
A fiber-optic scintillator radiation detector includes a multitude of optical fibers that each include an optical core. The optical cores are spaced apart from one another by an interposer material. In various embodiments, the interposer material has an average atomic number less than 13 and a density greater than 1.3 g/cm3.
Abstract translation:光纤闪烁体辐射检测器包括多个光纤,每个光纤包括光学核心。 光芯通过插入物材料彼此间隔开。 在各种实施方案中,插入材料的平均原子序数小于13,密度大于1.3g / cm 3。
Abstract:
The invention describes a radiation monitor for detecting the density of the radiation of an X-ray source, which passes through a surface. The radiation monitor comprises a plurality of optical waveguides which are arranged parallel in a plane perpendicular with respect to the main radiation direction of the radiation source. The optical waveguides have a scintillating and/or fluorescent material for generating optical signals when radiation enters the optical waveguides. Furthermore, the optical waveguides are connected at least at one end to a detector for converting the optical signals into electric signals.
Abstract:
A detector for detecting ionising radiation comprises a scintillator (10) selected to emit light in response to incidence thereon of radiation to be detected, at least one detector (16) for detecting said emitted light, and at least one optical waveguide (12) for transmitting said emitted light to said detector (16). The optical waveguide typically comprises a flexible solid or hollow fibre that can be incorporated into a flexible mat or into a fibre-reinforced structure, so that the detector is integrated therewith.
Abstract:
A method for real-time measurement of a dose of radiological radiation absorbed by a region to be inspected and which is subjected to a flow of radiological radiation. Said method comprises the following steps consisting in (a) detecting the incident radiation (11) incident at at least one point of the region to be inspected with the aid of at least one first measuring fiber optic beam (2) containing at least one fiber placed in said region to be inspected and adapted in such a way that it can generate a light signal when it receives radiological radiation; 2) measuring said light signal outside the region to be inspected after transmission along the measuring fiber optic; and (c) determining the dose of radiological radiation received by said measuring fiber optic from the light signal.
Abstract:
Procédé de mesure en temps réel d'une dose de rayonnement radiologique absorbée par une région à inspecter soumise à un flux de rayonnements radiologiques, comprenant les étapes consistant à (a) détecter le rayonnement (il) incident en au moins un point de la région à inspecter à l'aide d'au moins un premier faisceau de fibres optiques de mesure (2), contenant au moins inspecter et adaptée pour générer un signal lumineux lorsqu'elle reçoit un rayonnement radiologique, (b) mesurer ledit signal lumineux en dehors de la région à inspecter après transmission le long de la fibre optique de mesure, et (c) déterminer la dose de rayonnement radiologique reçue par ladite fibre optique de mesure à partir dudit signal lumineux.
Abstract:
A dosimeter (22) for an x-ray brachytherapy system permits in situ monitoring and control of radiation treatment via a miniaturized energy transducer (18) within a human body. The dosimeter comprises a scintillating optical fiber (26) having a distal end which is placed at the treatment site and a proximal end which is coupled to a dosimeter measurement unit (24). Utilizing energy applied by an energy source (14), the miniaturized transducer generates x-ray photons (20, 64). The scintillating optical fiber absorbs x-ray photons, converts the x-ray photons into light photons (66), and conveys the light photons to a dosimeter measurement unit. The light photons are converted into an electrical current which is representative to the intensity of the x-ray photons. The dosimeter measurement unit utilizes the electrical current to calculate and display the instantaneous and accumulated radiation dose, and radiation dose parameters are utilized to adjust energy levels, which are sent to the miniature energy transducer.
Abstract:
A method and apparatus for creating density images of an object (2) through the 3-dimensional tracking of protons that have passed through the object. More specifically, the 3-dimensional tracking of the protons is accomplished by gathering and analyzing image of the ionization tracks of the protons in a closely packed stack of scintillating fibers (12).
Abstract:
A contraband detection system (18) using a single, cone shaped neutron beam determines substances concealed in a sample object by developing total neutron cross section spectra for a plurality of elements, including carbon, nitrogen, oxygen, hydrogen and other potential contraband-indicating elements. A processor (26) performs a contraband determination classification based on the neutron total cross section spectra for the plurality of elements, including hydrogen and elements which do not have peaks in the energy range of interest. The contraband detection system (18) includes a neutron source (20) for producing a pulsed, cone shaped beam of fast white neutrons; a spatial neutron detection array (40); a conveyor system (28) for situating a sample object (29) between the source (20) and the detection array (40); a spectra analysis system (24) for determining the neutron total cross section spectra of elements located in the sample object; and the processor (26). The neutron source (20) produces a pulsed beam (36) of fast white neutrons having a sufficient energy range whereby removal of neutrons from the beam caused by the presence of a plurality of contraband-indicating elements can be determined. Various techniques of making contraband classification determinations are also disclosed.