In the radiogical study of the ancient cultural goods, we classify sculpturally Buddhist images of the secondary age, the radiographs of which we take by radioactive isotope Co 60,we will contribute to their preservation and management with throwing light upon their rapair and this technique.
At the reading of X-ray film. We must decrease elements accompanied with the difference of finding by observer as littele as passible. At the first the density and the contrast of film must be moderate and have the excellent sharpness. Then we should consider about the suitable illumination for reading because the reading of the film affect by the proportion of the penetration of the illustrated light. So it is happened that the contrast and density of film is sometimes worse by the visual affection of the differance of in tensity of illumination on the film and the illuminator. Then we considered the conditions that the illuminator must provide with and examined the practical range how they use effectually.
The auther manufactured on trial and appricated clinically the timer which need to take a high voltage radiography by this deep therapy apparatus (200kV-3mA). I'll report its result with reconsideration of high voltage radiographying method.