Experimental and theoretical investigations of diffraction enhanced imaging

详细信息    查看全文

• 作者：Junyue Wang ; Peiping Zhu ; Qingxi Yuan ; Wanxia Huang ; Hang Shu ; Bo Chen ; Enrong Li ; Yijin Liu ; Ti ; ou Hu ; Ziyu Wu
• 关键词：Phase contrast imaging ; Synchrotron radiation
• 刊名：Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
• 出版年：2007
• 出版时间：21 September 2007
• 年：2007
• 卷：580
• 期：1
• 页码：803-807
• 全文大小：323 K

文摘

This contribution investigates the effect on the imaging contrast of the small angle scattering and of the rocking curve in the entire angular range. We show that based on the small angle scattering properties, the reflectivity of the crystal analyzer and the rocking curve of the monochromator–analyzer, in a diffraction enhanced imaging (DEI) experimental setup the contrast of the image collected at the top of the rocking curve is always higher than that of the apparent absorption image. Moreover, our experimental data confirm that the quality of a refraction image is superior to a refraction-like image. In order to understand the observed behavior we introduce and discuss the contribution of a new term in the classical DEI equation.