Abstract: A scintillator stack includes a neutron-sensitive particulate material and a scintillator particulate material dispersed in separate layers. The scintillator stack can be included in a scintillator device. The scintillator stack can be made using a co-extrusion method.

Abstract: A radiation detection system can include a first material to produce a first light in response to receiving a target radiation. The radiation detection system can also include a second material to propagate a second light to a first end of the second material and to a second end of the second material, in response to receiving the first light. The radiation detection system can also include a reflector coupled to the first end of the second material. In an embodiment, the reflector can reflect the second light, so that the reflected second light can be received by a photosensor coupled to a second end of the second material.

Abstract: A radiation detection system can include a first material to produce a first light in response to receiving a target radiation. The radiation detection system can also include a second material to propagate a second light to a first end of the second material and to a second end of the second material, in response to receiving the first light. The radiation detection system can also include a reflector coupled to the first end of the second material. In an embodiment, the reflector can reflect the second light, so that the reflected second light can be received by a photosensor coupled to a second end of the second material.

Abstract: A radiation detector, in particular a gamma camera, is constructed and operated in such a fashion that only a predetermined number of light sensors (such as PMT's) adjoining each other in a cluster are used to generate a signal with amplitude and event position information. The camera may also use an array of individual scintillation elements (crystals) in place of a single crystal, with certain advantages obtained thereby. According to another aspect of the invention, there is a reflector sheet that defines an array of apertures through which scintillation light can pass from the scintillation crystal to a plurality of light sensors optically coupled to an optical window in an array corresponding to the array of apertures in the reflector.

Abstract: A radiation detector, in particular a gamma camera, is constructed and operated in such a fashion that only a predetermined number of light sensors (such as PMT's) adjoining each other in a cluster are used to generate a signal with amplitude and event position information. The camera may also use an array of individual scintillation elements (crystals) in place of a single crystal, with certain advantages obtained thereby. According to another aspect of the invention, there is a reflector sheet that defines an array of apertures through which scintillation light can pass from the scintillation crystal to a plurality of light sensors optically coupled to an optical window in an array corresponding to the array of apertures in the reflector.

Abstract: A compact medical nuclear imaging device, which generates a medical image from gamma radiation, can be held stationary or moved to search a large area for locating a radioactive area of interest. The compact medical imaging device comprises a collimator having an array of collimating channels, a radiation collection module converting the gamma radiation to an electric signal, an electronic module for processing the electrical signal, and a display module for displaying a two-dimensional image of the radiation scene, all of which preferably are assembled together in a single, compact module of a size small enough to permit it to be held and maneuvered by a human operator.

Abstract: A luminescent phosphor for use in radiation dosimetry in which the phosphor is pre-treated by exposure to ultraviolet radiations while simultaneously heating to elevated temperature after the phosphor has first been subjected to radiations in excess of 10.sup.3 rads.