| 摘要 |
An X-ray image radiographing system for radiographing a subject is provided with an X-ray source to emit X-rays; a digital X-ray detector to detect a digital X-ray image of the subject, wherein the subject is placed between the X-ray source and the digital X-ray detector in an arrangement to satisfy the following formulas so that an edge of the digital X-ray image is enhanced oven an edge-enhanced width: 0.1 m<=R 1 <=10 m, and 0.15 m<=R 2 <=10 m, where R 1 is a distance between the X-ray tube and the subject and R 2 is a distance between the subject and the digital X-ray detector. The digital X-ray detector has a pixel size almost equal to the half of the edge-enhanced width.
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