| 摘要 |
PURPOSE:To make it possible to rapidly and simply measure an accurate position and to enable detection without receiving the limit due to the thickness of a structure, by irradiating the structure with radioactive rays and measuring the position and shape of the radiation absorber embedded in the structure from the projection chart projected to a film. CONSTITUTION:A radiation absorber 2 such as reinforcement is embedded in a structure 1 such as a concrete wall body. A marking wire 3 such as a lead wire material is horizontally adhered to the radioactive ray irradiation surface A of the structure 1 and an insert hole 4 is horizontally provided to the side surface of the structure 1 crossing the irradiation surface A at right angles at the same height Z as the marking line 3 and the film cassette, wherein a film F1 is inserted in a container F2, is inserted in said hole 4. When X-rays are irradiated from the X-ray source 5 on the extension from the center point of the marking line 3, the projection chart of the embedded object 2 and marking line 3 can be formed on the film F1. By this method, the position or shape of the embedded object 2 can be detected. |
