Abstract: An X-ray photography device capable of visualizing the operating state or position of a support unit in an image system during examinations with memory switches and enhancing the operability of the memory switches is provided. When a plurality of memory switches 30a-30i is operated, target rotation information corresponding to the memory switches are read from a target rotation information memory unit 40, and a C-arm is controlled to rotate, so as to make actual rotation information consistent with the target rotation information. The memory switches 30a-30i are respectively arranged in association with rotation directions and rotation angles to designate specific storage areas in the target rotation information memory unit 40 corresponding to the directions and angles. During the rotation control or when the actual rotation information is consistent with the target rotation information, the corresponding display lamp (one of display lamps 31a-31i) of the operated memory switch is turned on.

Abstract: In a precessional operation where an X-ray irradiation means and a two-dimensional radiation detector are moving on a circular or elliptic orbit respectively by rotating either one of holding means, that is a C arm or a holding means at angular rate of a·sin(t) under a steady state condition and by rotating the other holding means at angular rate of b·cos(t), the operation is carried out at angular rate (f(t), g(t)) to ensure that the maximum acceleration is smaller than the steady state acceleration during a running-up period until steady is reached.

Abstract: An X-ray photography device capable of visualizing the operating state or position of a support unit in an image system during examinations with memory switches and enhancing the operability of the memory switches is provided. When a plurality of memory switches 30a-30i is operated, target rotation information corresponding to the memory switches are read from a target rotation information memory unit 40, and a C-arm is controlled to rotate, so as to make actual rotation information consistent with the target rotation information. The memory switches 30a-30i are respectively arranged in association with rotation directions and rotation angles to designate specific storage areas in the target rotation information memory unit 40 corresponding to the directions and angles. During the rotation control or when the actual rotation information is consistent with the target rotation information, the corresponding display lamp (one of display lamps 31a-31i) of the operated memory switch is turned on.

Abstract: When urinary organ contrasting inspection is performed by using a fluoroscopy for digestive organs, a region of interest such as a bladder often comes to a vicinity of a foot side end of a table top. Consequently, it is often the case that an irradiation field cannot be limited to a suitable area with respect to the region of interest and only an oblique photography can be performed. When the urinary organ contrasting inspection is performed, an X-ray tube device (1), an X-ray diaphragm (16), and an X-ray image detector (3) are interlocked to enable a foot side end of the irradiation field to be consistent with a foot side end of the X-ray image detector (3). Thus, a focal point (1A) of the X-ray tube device (1) can be moved directly above the foot side end of the X-ray image detector (3).

Abstract: When urinary organ contrasting inspection is performed by using a fluoroscopy for digestive organs, a region of interest such as a bladder often comes to a vicinity of a foot side end of a table top. Consequently, it is often the case that an irradiation field cannot be limited to a suitable area with respect to the region of interest and only an oblique photography can be performed. When the urinary organ contrasting inspection is performed, an X-ray tube device (1), an X-ray diaphragm (16), and an X-ray image detector (3) are interlocked to enable a foot side end of the irradiation field to be consistent with a foot side end of the X-ray image detector (3). Thus, a focal point (1A) of the X-ray tube device (1) can be moved directly above the foot side end of the X-ray image detector (3).

Abstract: In a precessional operation where an X-ray irradiation means and a two-dimensional radiation detector are moving on a circular or elliptic orbit respectively by rotating either one of holding means, that is a C arm or a holding means at angular rate of a·sin(t) under a steady state condition and by rotating the other holding means at angular rate of b·cos(t), the operation is carried out at angular rate (f(t), g(t)) to ensure that the maximum acceleration is smaller than the steady state acceleration during a running-up period until steady is reached.

Abstract: An X-ray tube device is rotated to a projected portion in a subject by a rotating mechanism for the X-ray tube device according to an operation for an oblique fluoroscopy. A CPU recognizes information about a rotating angle and rotation speed, and a stand for the X-ray tube is moved along a longitudinal direction of a top plate by a driving mechanism for the stand according to the information. An X-ray image detector disposed under the top plate is moved in a direction opposite to the movement of the stand to a corresponding position of the X-ray tube device by a driving mechanism for the X-ray image detector. The X-ray tube device, the projected portion in the subject and the X-ray image detector are always arranged in a straight line by the CPU and the independent driving mechanisms. A tomography may also be carried out by moving continuously the X-ray tube device and the X-ray image detector parallel to the top plate in the opposite directions.

Abstract: During X-ray irradiation, a lever is operated to simultaneously move an imaging part and table in opposite directions from each other. A contrast medium's flow in an artery may be followed so that it is shown on a monitor. Relative speed of the table to X-ray imaging part can be adjusted by adjusting the amount of inclination of the lever.

Abstract: An X-ray tube device is rotated to a projected portion in a subject by a rotating mechanism for the X-ray tube device according to an operation for an oblique fluoroscopy. A CPU recognizes information about a rotating angle and rotation speed, and a stand for the X-ray tube is moved along a longitudinal direction of a top plate by a driving mechanism for the stand according to the information. An X-ray image detector disposed under the top plate is moved in a direction opposite to the movement of the stand to a corresponding position of the X-ray tube device by a driving mechanism for the X-ray image detector. The X-ray tube device, the projected portion in the subject and the X-ray image detector are always arranged in a straight line by the CPU and the independent driving mechanisms. A tomography may also be carried out by moving continuously the X-ray tube device and the X-ray image detector parallel to the top plate in the opposite directions.

Abstract: An X-ray photographic holder adapted to use a cassette includes a carriage having the cassette placed thereon, which is reciprocally movable between a cassette loading position and a radiographic position. On the carriage a pair of grippers are provided movable in the direction perpendicular to the carriage movement. An endless belt is driven by a motor, guided by pulleys provided on the carriage and engaged with the grippers. The carriage is stopped from moving by a stopper means so long as in the cassette loading position. In this state the cassette can be gripped by the grippers so to be set in a fixed position. After this positioning, the stopper means is released to move the carriage so that the center of the cassette can be brought to a radiographic position.