抄録
X-ray beams irradiated from an X-ray tube with a point source or a sufficiently small focal spot produce edgeenhanced images in the boundary of the object due to the effect of phase shift of X-rays. This effect is called phase contrast imaging. A “digital” phase contrast imaging system based on a photostimulable phosphor plate designed for mammography was developed for clinical use recently and now commercially available. However, the effectiveness of the phase contrast imaging applied to the digital system has not been reported yet. In this study, the edge enhancement effect caused by digital phase contrast imaging was evaluated by using the acrylic fiber and acrylic plate, and plant seeds. Our results indicated that higher contrast and sharper images than those for the contact imaging can be obtained. To further improve the image quality of the digital phase contrast imaging, a photostimulable phosphor plate with superior sharpness needs to be developed in the future.
