| 摘要 |
An x-ray generator tube which includes an electron gun for directing a focused high energy electron beam toward an anode presenting an enlarged face inclined relative to the electron beam; with the tube having deflection coils for sweeping the beam across the enlarged anode face producing a moving focal spot. The tube envelope provides a shielded point-source window oriented with respect to the anode to pass only a thin beam of the x-rays which are generated at the moving focal spot, thereby producing a sweeping beam of x-rays. The sweeping x-ray beam is directed through the subject to an x-ray sensitive video pickup tube which is similar to a TV camera pickup tube, and which includes a face plate having a mosaic of chemically treated globules sensitive to x-rays which produces an electric image corresponding to the x-ray image produced by the sweeping x-ray beam passing through the subject being x-rayed. This mosaic is scanned and the pickup tube produces a video output signal in a conventional manner.
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