| 摘要 |
PURPOSE:To display or record a visible image corresponding to a radiation image, by a method wherein a fluorescent substance layer and an electron multiplying mechanism for multiplying an electron by the optical stimulation of said layer are accommodated in a single vacuum container to make it possible to directly multiply and convert the radiation image to an electric signal which is in turn supplied to an imaging mechanism. CONSTITUTION:After X-rays permeating a subject are irradiated to the fluorescent substance layer 2 of an X-ray image multiplying tube to form a latent image on the fluorescent surface thereof, galvanometers 7, 8 are swung by the signals of saw tooth wave generators 10, 11 and the surface of the fluorescent substance layer 2 is rapidly scanned by fine laser beams from a laser beam source 9. By this scanning, an exoelectron proportional to the irradiated X-ray amount is discharged from each scanning point and multiplied an electron multiplying mechanism 3 to be collected by an output electrode 5. The current obtained from the output electrode 5 is inputted in the Z-axis of CRT 12 through an amplifier 13 and an image treating circuit 14. Because the signals of the saw tooth wave generators 10, 11 are supplied to the X-axis terminal and the Y-axis terminal of the CRT 12, a visible image corresponding to the X-ray image permeating the subject is projected to the CRT 12. |
