Abstract: Disclosed is a radiation detection element which can inexpensively be manufactured. The detection element including, as a main component, a base resin not containing any fluorescent substance at all is used for radiation measurement.

Abstract: A resin for scintillators having high radiation sensitivity, which is obtained without using a wavelength conversion agent. The resin for the scintillator of a radiation detector contains a polyester having a unit represented by the following formula (1). (In the above formula (1), Ar is a naphthalenediyl group or an anthracenediyl group all of which may be substituted by an alkyl group having 1 to 6 carbon atoms or a halogen atom. X is an aliphatic hydrocarbon group having 2 to 20 carbon atoms, an alicyclic hydrocarbon group having 2 to 20 carbon atoms or an aromatic hydrocarbon group having 5 to 20 carbon atoms all of which may be substituted by an alkyl group having 1 to 6 carbon atoms or a halogen atom.

Abstract: A gamma ray detector for detecting a gamma ray emitted from a target of measurement includes: an organic scintillator for detecting Compton electrons resulting from a gamma ray emitted from the target of measurement; an inorganic scintillator for detecting a Compton gamma ray; and photodetector modules for detecting light generation in the corresponding scintillators. Light generation signals from the organic and inorganic scintillators are synchronously measured, and a detection window of a gamma ray is generated. Thus, an inexpensive radiation diagnostic device of an ultra-high S/N ratio and low cost is provided.

Abstract: A beta ray detector and a beta ray reconstruction method are capable of achieving consistently high detection efficiency of beta rays in a wider energy region compared to that of a conventional beta ray detector while enhancing energy resolution. The beta ray detector comprises an absorber scintillator disposed to face a subject emitting beta rays and that is made from an absorptive substance exhibiting a high permeability and a high rate of absorption with respect to beta rays, a backscattering scintillator disposed on the backside of the absorber scintillator and that is made from a backscattering substance exhibiting a low permeability and a high rate of backscattering with respect to beta rays, and an energy detector that combines the amounts of beta ray energy absorption simultaneously measured by the two types of scintillators to reconstruct the energy and detection position of the beta rays emitted from the subject.

Abstract: Provided are a gamma ray detector and a gamma ray reconstruction method which can be used in SPECT and PET and which combine and reconstruct the information on “Compton-scattered” gamma rays, thereby remarkably increasing gamma ray detection sensitivity, decreasing the amount of a radioactive substance given to a subject, and remarkably reducing the concern about the amount of radiation exposure. The gamma ray detector comprises an absorber scintillator 12 made from an absorptive substance exhibiting a high rate of absorption with respect to gamma rays 1 in an energy region, emitted from a subject, a Compton scattering scintillator 14 made from a Compton scattering substance exhibiting a high probability of Compton scattering, and an energy detector 16 which combines the amounts of gamma ray energy absorption simultaneously measured by the two types of scintillators to reconstruct the gamma rays emitted from the subject.

Abstract: Disclosed is a radiation detection element which can inexpensively be manufactured. The detection element including, as a main component, a base resin not containing any fluorescent substance at all is used for radiation measurement.

Abstract: When an energy of a particle emitted from a radioisotope source is obtained by a detector, a histogram obtained from a relationship between a difference ?E between an energy of a particle emitted outside the radioisotope source and an initial energy which the particle possesses at the time of generation and a count is treated as being asymmetric, and an energy distribution (L1) of the particle emitted outside the radioisotope source is obtained, thereby allowing an energy calibration of a radiation detector, absolute quantitation and resolution measurement to be performed with accuracy.

Abstract: A gamma ray detector for detecting a gamma ray emitted from a target of measurement includes: an organic scintillator for detecting Compton electrons resulting from a gamma ray emitted from the target of measurement; an inorganic scintillator for detecting a Compton gamma ray; and photodetector modules for detecting light generation in the corresponding scintillators. Light generation signals from the organic and inorganic scintillators are synchronously measured, and a detection window of a gamma ray is generated. Thus, an inexpensive radiation diagnostic device of an ultra-high S/N ratio and low cost is provided.

Abstract: Provided are a beta ray detector and a beta ray reconstruction method capable of achieving consistently high detection efficiency of beta rays in a wider energy region compared to that of a conventional beta ray detector while enhancing energy resolution. The beta ray detector comprises an absorber scintillator 12 which is disposed to face a subject emitting beta rays and is made from an absorptive substance exhibiting a high permeability and a high rate of absorption with respect to beta rays, a backscattering scintillator 14 which is disposed on the backside of the absorber scintillator and is made from a backscattering substance exhibiting a low permeability and a high rate of backscattering with respect to beta rays, and an energy detector 16 which combines the amounts of beta ray energy absorption simultaneously measured by the two types of scintillators to reconstruct the energy and the detection position of the beta rays emitted from the subject.

Abstract: Provided are a gamma ray detector and a gamma ray reconstruction method which can be used in SPECT and PET and which combine and reconstruct the information on “Compton-scattered” gamma rays, thereby remarkably increasing gamma ray detection sensitivity, decreasing the amount of a radioactive substance given to a subject, and remarkably reducing the concern about the amount of radiation exposure. The gamma ray detector comprises an absorber scintillator 12 made from an absorptive substance exhibiting a high rate of absorption with respect to gamma rays 1 in an energy region, emitted from a subject, a Compton scattering scintillator 14 made from a Compton scattering substance exhibiting a high probability of Compton scattering, and an energy detector 16 which combines the amounts of gamma ray energy absorption simultaneously measured by the two types of scintillators to reconstruct the gamma rays emitted from the subject.

Abstract: When an energy of a particle emitted from a radioisotope source is obtained by a detector, a histogram obtained from a relationship between a difference ?E between an energy of a particle emitted outside the radioisotope source and an initial energy which the particle possesses at the time of generation and a count is treated as being asymmetric, and an energy distribution (L1) of the particle emitted outside the radioisotope source is obtained, thereby allowing an energy calibration of a radiation detector, absolute quantitation and resolution measurement to be performed with accuracy.

Abstract: When the USB power supply (VBUS) of the USB interface is used as the power supply for driving a conventional optical disc apparatus or disc apparatus, the supplied current exceeds the standard of USB.

Abstract: The object is to provide an optical disc drive and a recording/reproduction method for optical disc devices capable of returning to an ordinary operation, even if an over-current generates due to an instantaneous current consumption, since the power supply from a USB port is not shut down. The object is solved by the constitution which is provided with a current detection unit that detects the current flowing in from the power supplying unit of a USB port, temporarily turns off at least one of an actuator driver, feed motor driver or spindle motor driver when the inflow current exceed a pre-determined value, and sustains such temporary turn-off of at least one of the actuator driver, feed motor driver or spindle motor driver intermittently until the inflow current decreases to the threshold or below.

Abstract: When the USB power supply (VBUS) of the USB interface is used as the power supply for driving a conventional optical disc apparatus or disc apparatus, the supplied current exceeds the standard of USB.

Abstract: A small-sized printer includes a printing section equipped with a shuttle head in which impact-type printing units are arranged in juxtaposition in a sub-scanning direction, a cylindrical cam for reciprocating the shuttle head in the sub-scanning direction, and paper feeding rollers for feeding a standard sheet in a main scanning direction; an input device for inputting information; a display device for displaying information; a RAM for storing information; and a CPU for controlling the printing section, the input section, the display device and the RAM and performing calculation on information. The printing section and the paper feeding rollers are provided in a body case in such a way as to be exposed where they are opposed to a case cover, which has a flat platen and spring members at positions opposed to the printing section, and ribs adapted to come into contact with the standard sheet and serving as a positioning device and as a sliding guide.