Effect of particle-size selectivity on quantitative X-ray dark-field computed tomography using a grating interferometer. (August 2017)

• Record Type: Journal Article
• Authors: Bao, Yuan; Shao, Qigang; Hu, Renfang; Wang, Shengxiang; Gao, Kun; Wang, Yan; Tian, Yangchao; Zhu, Peiping
• Is Part Of: Radiation physics and chemistry. Volume 137(2017)
• Page Start: 260
• Page End: 263
• Publication Date: 2017-08
• Subjects: Dark-field -- Computed tomography -- Grating interferometer -- Particle-size; Radiation chemistry -- Periodicals; Radiometry -- Periodicals; Radiation -- Periodicals; Chimie sous rayonnement -- Périodiques; 539.2
• DOI: 10.1016/j.radphyschem.2016.01.022
• Languages: English
• ISSNs: 0969-806X

Abstract

Abstract: According to the conclusion of Khelashvili et al. [Phys. Med. Biol. 51, 221 (2006)], the minus logarithm of the visibility ratio fulfills the line integral condition; consequently the scattering information can be reconstructed quantitatively by conventional computed tomography (CT) algorithms. Based on Fresnel diffraction theory, we analyzed the influence of particle-size selectivity on the performance of an X-ray grating interferometer (GI) applied for dark-field CT. The results state the signal-to-noise ratio (SNR) of dark-field imaging is sensitive to the particle size, which demonstrate that the X-ray dark-field CT using a GI can efficiently differentiate materials of identical X-ray absorption and help to choose optimal X-ray energy for known particle size, thus extending the application range of grating interferometer. Highlights: Propose a method to differentiate materials of identical X-ray absorption. Quantitatively reconstruct the dark-field CT image with specific particle-size. Extend the application range of grating interferometer.