Abstract: There are provided an X-ray CT system and an X-ray CT method in which a subject can be brought as close as possible to an X-ray source at all times while preventing interference of the subject with the X-ray source at the time of rotation, without confirmation by an operator by rotating a rotary stage before CT projection. A subject W placed on a rotary stage 3 is captured by an optical camera 6, and information about a shape, a size and a position relative to a rotational axis R, of the subject W, are acquired by image processing using captured data. Then, interference between the subject W and an X-ray source 1 is monitored on the basis of the information, or the rotary stage 3 is automatically positioned at a location where the subject approaches most closely to the X-ray source 1 without interference.

Abstract: There are provided an X-ray CT system and an X-ray CT method in which a subject can be brought as close as possible to an X-ray source at all times while preventing interference of the subject with the X-ray source at the time of rotation, without confirmation by an operator by rotating a rotary stage before CT projection. A subject W placed on a rotary stage 3 is captured by an optical camera 6, and information about a shape, a size and a position relative to a rotational axis R, of the subject W, are acquired by image processing using captured data. Then, interference between the subject W and an X-ray source 1 is monitored on the basis of the information, or the rotary stage 3 is automatically positioned at a location where the subject approaches most closely to the X-ray source 1 without interference.

Abstract: An optical camera 5 for photographing a fluoroscopy object W on a sample stage 3 is provided. Prior to a fluoroscopic operation, the sample stage 3 is driven, and the fluoroscopy object W is photographed in a plurality of postures by the optical camera 5, and optical images are stored in a storage device 14. Among the optical images stored in the storage device 14, an optical image O that is closest to an image of the fluoroscopy object W viewed from the fluoroscopy direction at current time is selected and displayed on a display 13 during the fluoroscopic operation. This enables intuitive grasping of the fluoroscopy direction, and intuitive grasping of the fluoroscopy position is also enabled by superimposing and displaying a marker M, which represents a position of an X-ray optical axis L, in addition to the optical image O.

Abstract: There is provided an X-ray fluoroscope which enables, at all times, intuitive and easy grasping of a fluoroscopy direction and a fluoroscopy position of an fluoroscopy object without performing the operation such as checking the fluoroscopy position and the fluoroscopy direction and the like by lowering fluoroscopic magnification. An optical camera 5 for photographing a fluoroscopy object W on a sample stage 3 is provided. Prior to a fluoroscopic operation, the sample stage 3 is driven, and the fluoroscopy object W is photographed in a plurality of postures by the optical camera 5, and optical images are stored in a storage device 14. Among the optical images stored in the storage device 14, an optical image O that is closest to an image of the fluoroscopy object W viewed from the fluoroscopy direction at current time is selected and displayed on a display 13 during the fluoroscopic operation.

Abstract: An optical camera for photographing a subject held on a rotary stage is disposed on the rotation axis of the rotary stage. A computer calculates a region where CT imaging is possible around the rotation axis by using information relating to the positional relation of an X-ray source, an X-ray detector and the rotary stage in the direction of the optical axis of an X-ray, and information relating to the size of a light receiving surface of the X-ray detector. The region where CT imaging is possible is displayed being superimposed with a subject image photographed by the optical camera on an displaying unit, whereby the position of the subject at that time point can be easily compared with the region where the X-ray transmission data can be obtained.

Abstract: An optical camera for photographing a subject held on a rotary stage is disposed on the rotation axis of the rotary stage. A computer calculates a region where CT imaging is possible around the rotation axis by using information relating to the positional relation of an X-ray source, an X-ray detector and the rotary stage in the direction of the optical axis of an X-ray, and information relating to the size of a light receiving surface of the X-ray detector. The region where CT imaging is possible is displayed being superimposed with a subject image photographed by the optical camera on an displaying unit, whereby the position of the subject at that time point can be easily compared with the region where the X-ray transmission data can be obtained.

Abstract: X- and y-axis moving mechanisms are provided for positioning a sample table in the x-axis and the y-axis directions. A yT-axis moving mechanism for moving those moving mechanisms in a direction along a tilting direction of a X-ray camera is provided separately from the x- and y-axes moving mechanisms. When the X-ray camera is tilted, the sample table is moved by the yt axis moving mechanism and a z-axis moving mechanism, whereby a viewpoint of the sample and a fluoroscopic magnification factor set before the X-ray camera is tilted are left unchanged. The coordinates on the sample table by the moving mechanisms before the X-ray camera is tilted can be used as they are even after the camera is tilted.

Abstract: X- and y-axis moving mechanisms are provided for positioning a sample table in the x-axis and the y-axis directions. A yT-axis moving mechanism for moving those moving mechanisms in a direction along a tilting direction of a X-ray camera is provided separately from the x- and y-axes moving mechanisms. When the X-ray camera is tilted, the sample table is moved by the yt axis moving mechanism and a z-axis moving mechanism, whereby a viewpoint of the sample and a fluoroscopic magnification factor set before the X-ray camera is tilted are left unchanged. The coordinates on the sample table by the moving mechanisms before the X-ray camera is tilted can be used as they are even after the camera is tilted.

Abstract: A reference line mark for an optical extensometer of the invention has a mark main body with a boundary shape, in which a reflectance of light is different from other portions. The boundary shape is arranged such that when the mark main body is integrated in a direction perpendicular to the deformation direction under the condition that the mark is attached to a test piece, results of the integration constitute an isosceles triangle having a base in a deformation direction of the test piece. Thus, data points for obtaining edge portions of the mark can be increased, and error-free approximation can be available. Elongation of the test piece can be measured with high accuracy at high computing speed.

Abstract: The present invention is arranged such that: laser light is irradiated onto the surface of a specimen over a predetermined length thereof in the direction of elongation to be measured; that scattering light of the laser light reflected from the specimen surface is photoelectrically converted to obtain speckle pattern data; out of the speckle pattern data thus obtained, the data from two zones on the specimen which are separated from each other by a predetermined distance in the elongation direction, are initially set as observation point data; with the use of the observation point data, the amounts of movement of the speckle patterns from the two zones on the specimen are calculated; the zones serving as observation point data sources are shifted in the speckle pattern movement direction each time the calculation results of the speckle pattern movement amounts reach a predetermined amount; and the elongation of the specimen between the initially set two zones is calculated based on (i) the shift amounts of th

Abstract: A radiation image detecting system whose radiation image receiving plane consists of a (m, n) sensor matrix is improved in the S/N ratio by providing radiation sensors constituting the sensor matrix with their respective buffer circuits. The buffer circuits prevent the capacitance components of the sensors from being transmitted to m row-side amplifiers and n column-side amplifiers causing both the m row-side amplifiers taking charge of the output from n radiation sensors and the n column-side amplifiers taking charge of the output from m radiation sensors to have their S/N ratio improved so as to depend on .sqroot.n and .sqroot.m, respectively.