| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve the problem wherein, when measuring a residual thickness of a metal pipe, there is no method for evaluating quantitatively the thickness of a corrosion part from a planer imaging by removing energy transition or a scattered state on the inner/outer surface of the pipe which may cause an error. Ž<P>SOLUTION: A residual thickness of a thinned metal pipe is quantified from one-time photographing result using an imaging plate having a photostimulable phosphor medium capable accumulating a radiation dose, applied onto the surface, by using a correlation regression expression of a measured brightness value of the imaging plate in the long axis direction or in the circumferential direction of the metal pipe, and a radiation transmission thickness in the case of having no thinning. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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