Abstract: This invention has one object to provide radiation tomography apparatus that allows suppression of arithmetic load of detection data with a wider detector ring. In order to achieve this purpose, the radiation tomography apparatus according to this invention performs coincidence only when two scintillation counter crystals that detect gamma rays coincidentally (A) belong to the same ring unit, or (B) belong to each of the ring units adjacent to each other. Accordingly, a distance in the central axis direction between the radiation detecting elements is limited to be equal to or less than a thickness of the ring unit in the central axis direction. Accordingly, radiation tomography apparatus may be provided that allows generation of the sectional image suitable for diagnosis while arithmetic load is suppressed.

Abstract: A water vapor permeable membrane is provided comprising a dense layer and a support layer that are adjacent to each other, wherein the dense layer contains voids with a void length of 0.1 ?m or less and the dense layer has a thickness of 0.1 ?m or more and 2 ?m or less while in the support layer, void (a), i.e. the void with the largest length in the 2 ?m thick region measured from the boundary between the dense layer and the support layer into the support layer, has a length of 0.3 ?m or more and void (b), i.e. the void with the largest length in the region ranging between 2 ?m and 4 ?m measured from the boundary into the support layer, has a length of 0.5 ?m or more, the length of the void (b) being larger than that of the void (a). A water vapor permeable membrane having both a high water vapor permeability and a low air leakage is provided.

Abstract: This invention has one object to provide a method of collecting calibration data in radiation tomography apparatus that allows reliable collection of calibration data with a wide detector ring. In order to achieve this purpose, in the method of collecting calibration data in radiation tomography apparatus according to this invention, the number of coincidence events is obtained while the phantom that emits annihilation gamma-ray pairs moves as to pass through an inner hole of the detector ring. Such configuration dose not need the phantom having a width equal or larger than the detector ring, and may realize reliable collection of calibration data. Moreover, it may be considered that annihilation gamma-ray pairs have been emitted in uniform property without depending on positions of the detector ring. As a result, calibration data that is more suitable for removal of a image artifact may be obtained.

Abstract: One purpose of this invention is to provide radiation tomography apparatus with easier maintenance. A specific approach for this purpose is as follows. That is, a detector ring in the radiation tomography apparatus includes two or more rings. Moreover, a ring moves as to approach a next ring, whereby both the rings are connected. If radiation tomography is conducted while a clearance is provided between the rings, detection sensitivity of the detector ring decreases due to the clearance. On the other hand, according to this invention, the ring moves as to approach the next ring, which results in a narrower clearance. Accordingly, radiation that is not observed may be reduced as much as possible.

Abstract: A water vapor permeable membrane is provided comprising a dense layer and a support layer that are adjacent to each other, wherein the dense layer contains voids with a void length of 0.1 ?m or less and the dense layer has a thickness of 0.1 ?m or more and 2 ?m or less while in the support layer, void (a), i.e. the void with the largest length in the 2 ?m thick region measured from the boundary between the dense layer and the support layer into the support layer, has a length of 0.3 ?m or more and void (b), i.e. the void with the largest length in the region ranging between 2 ?m and 4 ?m measured from the boundary into the support layer, has a length of 0.5 ?m or more, the length of the void (b) being larger than that of the void (a). A water vapor permeable membrane having both a high water vapor permeability and a low air leakage is provided.

Abstract: This invention has one object is to provide radiation tomography apparatus that allows production with low price through suppression in number of radiation detectors to be mounted. One of the detector rings in this invention is a first detector ring having a sufficient internal diameter to introduce shoulders of the subject M, and the other is a second detector ring having a smaller internal diameter than the first detector ring. In so doing, the radiation detectors forming the detector ring may be suppressed in number, which may provide radiation tomography apparatus of low price. Moreover, a smaller diameter of the detector ring may result in improved spatial resolution and detection sensitivity of radiation.

Abstract: One purpose of this invention is to provide radiation tomography apparatus with easier maintenance. A specific approach for this purpose is as follows. That is, a detector ring in the radiation tomography apparatus includes two or more rings. Moreover, a ring moves as to approach a next ring, whereby both the rings are connected. If radiation tomography is conducted while a clearance is provided between the rings, detection sensitivity of the detector ring decreases due to the clearance. On the other hand, according to this invention, the ring moves as to approach the next ring, which results in a narrower clearance. Accordingly, radiation that is not observed may be reduced as much as possible.

Abstract: Provided is a medical image diagnosis apparatus which requires a small area for installation, has a short length in an axial direction of the apparatus, can reduce a problem of the strength of a top plate, and can simultaneously carry out dynamic PET-imaging of the entire body. A top plate (61) on which an examinee lies is moved through a tunnel of a CT gantry (2) and a PET gantry (3) to execute CT imaging and PET imaging. A PET unit consisting of a plurality (e.g. seven) of PET units (32) has a length of 2 m in the axis direction, the visual field thereof covers the whole body and the whole body can be simultaneously subjected to dynamic PET-imaging. For the maintenance of the PET gantry (3), the diagnosis apparatus is separated at an arbitrary PET unit (32) to be maintained, the apparatus slides on a rail (31) in the axis direction and is separated for maintenance operation. Accordingly, a large space for maintenance is not required and the area for installation is small.

Abstract: This invention has one object to provide a method of collecting calibration data in radiation tomography apparatus that allows reliable collection of calibration data with a wide detector ring. In order to achieve this purpose, in the method of collecting calibration data in radiation tomography apparatus according to this invention, the number of coincidence events is obtained while the phantom that emits annihilation gamma-ray pairs moves as to pass through an inner hole of the detector ring. Such configuration dose not need the phantom having a width equal or larger than the detector ring, and may realize reliable collection of calibration data. Moreover, it may be considered that annihilation gamma-ray pairs have been emitted in uniform property without depending on positions of the detector ring. As a result, calibration data that is more suitable for removal of a image artifact may be obtained.

Abstract: This invention has one object to provide radiation tomography apparatus that allows suppression of arithmetic load of detection data with a wider detector ring. In order to achieve this purpose, the radiation tomography apparatus according to this invention performs coincidence only when two scintillation counter crystals that detect gamma rays coincidentally (A) belong to the same ring unit, or (B) belong to each of the ring units adjacent to each other. Accordingly, a distance in the central axis direction between the radiation detecting elements is limited to be equal to or less than a thickness of the ring unit in the central axis direction. Accordingly, radiation tomography apparatus may be provided that allows generation of the sectional image suitable for diagnosis while arithmetic load is suppressed.

Abstract: A power tool includes a motor, a housing that accommodates the motor, a switch that supplies power to the motor, a switch lever that is provided movable relative to the housing to selectively turn ON and OFF the switch, and an off-lock member that is provided movable relative to the switch lever. The off-lock member includes a first engaging part and a second engaging part that are engageable with the housing.

Abstract: A grinder includes a housing, a gear cover attached to the housing by a plurality of screws, a spindle case attached to the gear cover, a wheel guard rotatably mounted on the spindle case for covering approximately a half of a disc-shaped tool bit attached to a spindle, a stop piece that regulates the rotation of the wheel guard. The wheel guard is selectively fixed to and unfixed from the spindle case. The stop piece is fixed to the housing together with the gear cover by at least one of the plurality of screws. The stop piece has an abutting section at which the stop piece abuts the wheel guard to regulate the rotation of the wheel guard. The abutting section is located at a position deviated from an axial line of the at least one of the plurality of screws.

Abstract: According to an aspect of the present invention, there is provided a power tool including: a motor; a switching device that switches over, in response to a conduction angle thereof, an AC voltage to be applied to the motor; a rotation speed setting unit that sets a target rotation speed of the motor; a rotation speed detection unit that detects an actual rotation speed of the motor; and a controller that determines the conduction angle by comparing the actual rotation speed with the target rotation speed and that controls the switching device by use of the conduction angle based on a maximum conduction angle, the maximum conduction angle being set in accordance with the target rotation speed.

Abstract: A polyamide resin composition comprising a polyamide (X) having a diamine constituent unit which is mainly composed of a m-xylylenediamine unit and a dicarboxylic acid constituent unit which is mainly composed of an adipic acid unit; and specific amounts of a phosphorus acid antioxidant and alkaline component. The polyamide (X) is characterized by a specific range of terminal-group concentration balance and a specific amino-group reaction rate. This composition can simultaneously achieve inhabitation of yellow discoloration and reduction of number of gels or fish eyes.

Abstract: A polyamide resin composition comprising a polyamide (X) having a diamine constituent unit which is mainly composed of a m-xylylenediamine unit and a dicarboxylic acid constituent unit which is mainly composed of an adipic acid unit; and specific amounts of a phosphorus acid antioxidant and alkaline component. The polyamide (X) is characterized by a specific range of terminal-group concentration balance and a specific amino-group reaction rate. This composition can simultaneously achieve inhabitation of yellow discoloration and reduction of number of gels or fish eyes.

Abstract: A semiconductor package providing with a printed circuit board and a semiconductor device, including a semiconductor substrate having a surface provided with an external connection electrode and mounted on the printed circuit board, and, a surface opposite that with said external connection electrode, abrased with a mirror finish and reinforced with a back-surface reinforcement.

Abstract: Provided is a structure designed for adsorption, which is suitable for removing dioxin and dioxin-like substances from leachate and ground water from polluted soils or garbage, washing effluent from garbage incinerators and so on that contain DNA intercalators, particularly, dioxin and dioxin-like substances. The structure designed for adsorption is a structure designed for adsorption having an adsorbing layer containing, as a constituent, a DNA complex containing a DNA-binding protein, DNA including double strand DNA and a carrier, which can selectively remove DNA intercalators with high efficiency from water, gas and so on containing them.

Abstract: An underground structure cover comprises a cover body (10) and a receiving frame (20) arranged so that the cover body is fitted in and supported by the receiving frame in the manner that an inclined surface (11) of the outer circumference of the body meets an inclined surface (21) of the inner circumference of the frame. The inclined surfaces (11, 21) each have an upper inclined surface (11a, 21a) and a lower inclined surface (11b, 21b), and the lower inclined surfaces (11b, 21b) are steeper than the upper inclined surfaces (11a, 21a). The body (10) is fitted in and supported by the part (20) at the upper inclined surfaces (11a, 21a) and the lower inclined surfaces (11b, 21b). By this, the body is prevented from being wedged into the frame too deeply and also from becoming inclined with respect to the frame or riding up.

Abstract: A solid xylylenediamine solidified in a container is extremely excellent in storage stability as compared with a liquid xylylenediamine, and is less degraded by discoloration even when stored in an atmosphere containing oxygen. By charging a liquid xylylenediamine into a container, solidifying the liquid xylylenediamine into a solid xylylenediamine in the container under cooling without delay after the charging, and storing the solid xylylenediamine in the container while maintaining the xylylenediamine in a solid state, the xylylenediamine is stored for a long period of time without causing deterioration of quality such as discoloration.

Abstract: In a repeated batch production of polyamide, a dicarboxylic acid component and a diamine component fed to a batch reactor are melt-polymerized in the absence of solvent. After adding the diamine component to the molten dicarboxylic acid component, the melt polymerization is further continued at a temperature equal to or higher than the melting point of polyamide being produced for at least 10 min while maintaining the pressure of the vapor phase in the batch reactor at higher than 0.1 MPaG by introducing water vapor. The polyamide thus produced is hardly affected by gels even when the melt polymerization is conducted in the presence of polyamide remaining after the previous batch production. Molded articles thereof contain little fisheyes.