A radiation detector for detecting radiation and identifying the type thereof includes: a scintillator module formed by stacking a first scintillator emitting light in a first wavelength range by reacting with first radiation and a second scintillator emitting light in a second wavelength range by reacting with second radiation; a first optical filter attached to a region of the scintillator module and transmitting the light in the first wavelength range; a second optical filter attached to another region of the scintillator module and transmitting the light in the second wavelength range; a first photodetector sensing the light in the first wavelength range that has passed through the first optical filter; a second photodetector sensing the light in the second wavelength range that has passed through the second optical filter; and a controller determining radiation on the basis of sensing results by the first photodetector and the second photodetector.

An imaging apparatus includes: a first scintillator layer configured to provide first image signals with a first quantum efficiency and a first spatial resolution; a second scintillator layer configured to provide second image signals with a second quantum efficiency and a second spatial resolution, wherein the first quantum efficiency is lower than the second quantum efficiency, but the first spatial resolution is higher than the second spatial resolution; and an image combiner configured to combine the first image signals and the second image signals.

The invention relates to a combined detector (660) comprising a gamma radiation detector (100) and an X-ray radiation detector (661). The gamma radiation detector (100) comprises a gamma scintillator array (101.sub.x, y), an optical modulator (102) and a first photodetector array (103.sub.a, b) for detecting the first scintillation light generated by the gamma scintillator array (101.sub.x, y). The optical modulator (102) is disposed between the gamma scintillator array (101.sub.x, y) and the first photodetector array (103.sub.a, b) for modulating a transmission of the first scintillation light between the gamma scintillator array (101.sub.x, y) and the first photodetector array (103.sub.a, b). The optical modulator (102) comprises at least one optical modulator pixel having a cross sectional area (102′) in a plane that is perpendicular to the gamma radiation receiving direction (104). The cross sectional area of each optical modulator pixel (102′) is greater than or equal to the cross sectional area of each photodetector pixel (103′.sub.a, b).

A multilayer scintillation detector, includes at least three layers superposed on one another, and each extending parallel to a plane, called the detection plane, wherein each layer is formed by a first material, called a scintillation material, capable of interacting with an ionizing radiation and of forming, following the interaction, a scintillation light in a scintillation spectral band; each layer has a plurality of light guides, respectively extending parallel to the detection plane, according to a length, the light guides being disposed, over all or part of their length, parallel to an axis of orientation; the axis of orientation of the light guides of each layer is oriented, in the detection plane, according to an orientation, the orientations of the respective axes of orientation of at least three layers being different from one another, such that each layer has an associated orientation; and the scintillation material has a first refractive index.

A sensor for spectroscopic measurement of alpha and beta particles includes first and second layers, a photomultiplier, and an analyzer. A first material of the first layer scintillates a first stream of photons for each of the alpha particles. However, the beta particles pass through the first layer. A second material of the second layer scintillates a second stream of photons for each of the beta particles, but passes the first stream of photons for each alpha particle. The photomultiplier amplifies the first and second streams of photons for the alpha and beta particles into an electrical signal. The electrical signal includes a respective pulse for each of the alpha and beta particles. From the electrical signal, the analyzer determines a respective energy of each of the alpha and/or beta particles from a shape of the respective pulse for each of the alpha and beta particles.

Structures operable to detect radiation are described. An imaging system is also described having the structures. For example, a structure may include two screens and a photosensor array between the two screens. One of the screens is comprised of a scintillating glass substrate. The scintillating glass substrate may serve two purposes. The scintillating glass substrate converts incident x-rays into light photons. Additionally, the scintillating glass substrate is a substrate for the photosensor array. The photosensor array is configured to detect light photons that reach the photosensor array from both screens.

This invention enables highly accurate sample analysis by analyzing energy spectra obtained using a radiation detector, even under a high dose-rate environment. In a radiation analysis method disclosed here, first, a spectrum of a sample (measured spectrum) is measured by a radiation detector (sample measurement step: S1). The measured spectrum is obtained for each of different setting conditions, where a plurality of scintillators having different sizes and a plurality of shields having different thicknesses are used, respectively. Next, similar measurement is performed on a reference source (reference source measurement step: S2). Next, from reference spectra thus obtained in S2, a background nuclide-originating component, which is a component originating from a background nuclide (.sup.137Cs) included in the measured spectra, is estimated (background nuclide-originating component estimation step: S3). Next, a corrected spectrum is calculated as the difference between the measured spectrum and the background nuclide-originating component (corrected spectrum calculation step: S4).

The present disclosure relates to a method for detecting incoming radiation having a plurality of differing properties including at least one of differing types, differing energies or differing incoming directions. The method involves using a scintillator structure formed from first and second dissimilar scintillator materials, where the first and second dissimilar scintillator materials emit first and second different colors of light in response to the incoming radiation. A first light detector is used for detecting light having the first color, and a second light detector is used for detecting light having the second color. A first output signal is generated in response to the detection of light having the first color, and a second output signal is generated in response to detecting light having the second color. The first and second output signals are then analyzed to determine at least one property of the incoming radiation.

The present invention discloses an imaging device, method, and radiotherapy device for therapeutic energy spectrum CBCT. The device includes a double-layer detector and an image processing transmission device; the double-layer detector includes an upper layer detector and a lower layer detector; X-rays pass through the upper detector and are projected onto the lower detector; the upper detector is used to sense low energy X-rays and the lower detector is used to sense high energy X-rays. The image processing transmission device includes a first image processing transmission device and a second image processing transmission device. The first image processing transmission device corresponds to the upper detector and is used to process and transmit the sensing signal of the upper detector, while the second image processing transmission device corresponds to the lower detector and is used to process and transmit the sensing signal of the lower detector.

Hybrid material for plastic scintillation measurement comprising: a polymeric matrix; and a fluorescent mixture incorporated in the polymeric matrix and comprising, with respect to the total number of moles of primary fluorophore in the incorporated fluorescent mixture, i) from 95.6 molar % to 99.6 molar % of a main primary fluorophore consisting of naphthalene and ii) from 0.4 molar % to 20 molar % of an additional primary fluorophore. The decay constant of the fluorescence of the hybrid material is intermediate between that of a fast plastic scintillator material and of a slow plastic scintillator material. Further, they can be chosen over a wide range. The invention also relates to an associated part, device and item of equipment, to their processes of manufacture or their methods of measurement.