Phase-contrast X-ray imaging using bath vertically and horizontally expanded synchrotron radiation X-rays with asymmetric Bragg reflection

Results of phase-contrast X-ray imaging are presented. The optical system e mployed consisted of a successive arrangement of horizontal and vertical (, -) double crystals taking asymmetric Bragg reflection with an asymmetry f actor of similar to 0.2. The original beam size was thus expanded in both d irections and the field of view actually obtained was similar to 5 x 5 mm(2 ). Boundary structures in samples were clearly observed with much higher co ntrast than those obtained in conventional absorption-contrast imaging. Sin ce this method works in real time, it will provide a new X-ray imaging diag nosis technique for in situ observation over a large area of the samples.