| 摘要 |
PCT No. PCT/HU85/00061 Sec. 371 Date Jul. 7, 1986 Sec. 102(e) Date Jul. 7, 1986 PCT Filed Nov. 5, 1985 PCT Pub. No. WO86/03032 PCT Pub. Date May 22, 1986.Method and modifying body for influencing the effect of X-ray or gamma radiation on a target (7) sensitive to radiation, in particular for selective modification of a radiograph of an object (10). According to the invention a modifying body comprising at least two layer groups (31, . . . 3n) is arranged in front of the target, wherein each layer group (e.g., 32) emits a secondary radiation under the influence of the X-ray or gamma radiation or the secondary radiation of the previous layer group (e.g., 31), respectively, the energy of which is lying above the absorption energy level defined by the electron shell K of an element being present in the following layer group (e.g., 33) or in the target arranged behind the last layer group (3n), respectively. |
