| 摘要 |
A radiographic apparatus is disclosed for providing continuous radiographs or x-rays of a selected portion of a subject lying in a horizontal position by simultaneously rotating an x-ray source and an x-ray film holder including an x-ray film about the subject. An x-ray film cassette is mounted in the film holder and while the film holder rotates about the subject, the film cassette is moved past an x-ray slit. The x-ray source and film holder are mounted for rotation with respect to a pivoted gimbal frame and apparatus is disclosed for shifting the frame a selected amount about its pivot point to shift the axis of rotation of the source and film holder with respect to the subject being x-rayed. The x-ray source and film holder are preferably mounted on a rotatable disc and novel drive apparatus is disclosed for rotating the disc. The film holder includes a novel drive mechanism for moving the cylindrical film cassette, in which an x-ray film is placed, at the proper rate of speed to provide the desired x-ray during rotation of the source and film holder. Also, a patient conveyor cart is disclosed for conveying a patient to the x-ray machine and permitting him to be easily and safely placed in position in the machine while in a horizontal position. The x-ray apparatus also includes apparatus for elevating and positioning the patient at a proper position in the machine, and a programming apparatus for automatically controlling the sequence of operation of the x-ray apparatus during selected modes of operation. Also, a slide rule profile projector is provided for selecting the required amount of shift of the gimbal frame for a desired x-raying operation. |
