Abstract:
PROBLEM TO BE SOLVED: To provide a scintillator structure which has a function to guide scintillation light to an optical detector and has a large radiation absorption dosage.SOLUTION: The scintillator structure has a first phase and a second phase having larger refraction index than that of the first phase and having a linear attenuation coefficient different from that of the first phase, and has a first main plane and a second main plane which are not located on the same plane. The scintillator structure has a part where the second phase is exposed on the first main plane and the second main plane. A shape of one of the first phase and the second phase having a smaller linear attenuation coefficient is a shape in which at least a part of incident radiation coming from any directions from the first main plane to the phase having the smaller linear attenuation coefficient is shielded by a phase having a larger linear attenuation coefficient.
Abstract:
A fiber optic scintillator includes (18), for example, a plurality of relatively low-density glass scintillating elements (20) for converting radiation into light and a plurality of relatively high-density glass radiation absorbing elements (40) interspersed among the plurality of scintillating elements (20). The high-density glass radiation absorbing elements (40) increase the x-ray stopping power of the scintillator and also produce electron showers which interact desirably in adjacent scintillating elements (20) to increase the luminance of the scintillator (18). The high-density glass radiation absorbing elements also absorb x-ray cross-talk from absorption of radiation in the scintillating elements (20) and desirably include optical absorbers for absorbing optical cross-talk, both of which improves the resolution of the scintillator (18). The plurality of scintillating elements (20) and high-density glass radiation absorbing elements (40) typically are fibers, and the high-density glass radiation absorbing elements (140) may define cladding around the scintillating low-density glass fibers.
Abstract:
PROBLEM TO BE SOLVED: To provide a composition for reducing the production cost of a scintillator pack for CT (computerized tomography) system, etc., and improving the resolution. SOLUTION: The composition contains at least one of a glass composition and a glass-ceramic composition and further contains a plurality of scintillator crystals. The composition is produced by mixing/melting 20-60% glass powder having a particle size of 1-5 μm and 40-80% multiple scintillator crystals having a particle size of 1-20 μm to form a fiber preform and drawing the preform to form a glass fiber. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a light emitter, particularly for X-ray computer tomography comprising a ceramic of the general formula: (M 1-x Ln x ) 2 O 2 S wherein M represents at least one element selected from a group consisted of Y, La, Sc, Lu and/or Gd, and Ln represents at least one element selected from a group consisted of Eu, Ce, Pr, Tb, Yb, Dy, Sm and/or Ho. SOLUTION: The ceramic is made into a fibrous form and is arranged in parallel and bound as a fiber plate to give an anisotropic light guide to improve positional resolution of the light emitter without leakage of light between fibers. COPYRIGHT: (C)2005,JPO&NCIPI