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Abstract

When a conventional idea of determining a setting condition from a parameter of resolution (image resolution) is changed to use an X-ray tube with a stable focus size, setting conditions are determined from a focus size φ [μm] of the X-ray tube. The minimum radiography size b [μm] is settable from the focus size φ [μm] and φ≦b/2. A magnification rate ε is settable from the set minimum radiography size b [μm], a pixel pitch d [μm] of an X-ray detector, and bε/d≧5. Consequently, the minimum radiography size b [μm] and the magnification rate ε are each settable with use of the X-ray tube having the stable focus size φ [μm]. This results in stable radiography or fluoroscopy through magnifying an object in minute size.

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First Claim