X-ray radiographing apparatus

摘要

An X-ray source, a test substance holding section and an image recording section are arranged and structured to conduct a phase contrast radiographing such that when R 1 represents a distance (m) from a focal point of the X-ray source to the test substance held by the test substance holding section and R 3 represents a distance (m) from the focal point of the X-ray source to the X-ray detector, a magnifying power M represented by the formula of (M=R 3 /R 1 ) is from 10 to 40 and an X-ray arrival ratio of an amount of X-rays having arrived to the X-ray detector to an amount of the emitted X-rays is 45% or more.