| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a method for calibrating an imaging magnification whereby an imaging magnification of X-ray images of a measuring object can be correctly measured using a simple operation, thereby enabling strict analysis and measurement, on the basis of X-ray radiographic images and X-ray tomographic images. SOLUTION: A jig of a known size is placed on a measurement stage, and the imaging magnification is obtained from the X-ray radiographic image of the jig. Similarly, the imaging magnification is obtained from the X-ray radiographic image, after the measurement stage 13, is moved byΔd. A distance Di, between a focal point of an X-ray source 1 and a light-receiving face of an X-ray detector 2, and distances D1 and D2 between the focal point 1a of the X-ray source 1 and positions of the measurement stage, before and after being moved byΔd; can be calculated correctly through geometric calculations by correctly measuring the movement amountΔd. Even if the measurement stage 13 or the X-ray detector 2 is moved closer to or separated from the X-ray source 1 afterwards, the correct imaging magnification can be obtained, by using the calculation results so long as the movement amount can be measured correctly.</p> |
