X-ray phase-contrast imaging study of soft-tissue and bone samples

被引：7

作者：

Gao, DC ^{[1
]}

Pogany, A ^{[1
]}

Stevenson, AW ^{[1
]}

Gureyev, T ^{[1
]}

Wilkins, SW ^{[1
]}

机构：

[1] CSIRO Mfg Sci & Technol, Clayton, Vic 3169, Australia

来源：

MEDICAL IMAGING 1999: PHYSICS OF MEDICAL IMAGING, PTS 1 AND 2 | 1999年 / 3659卷

关键词：

phase contrast; imaging; X-rays; refraction; micro-focus; resolution;

D O I：

10.1117/12.349509

中图分类号：

R318 [生物医学工程];

学科分类号：

0831 ;

摘要：

Conventional radiography is based on absorption contrast and geometrical (ray) optics. After an outline of the relevant theory, this article reports results displaying both phase- and absorption-contrast, collected with a technique which utilizes a micro-focus x-ray source to achieve a high degree of spatial coherence, and relatively large object-to-image: distances to enable (wave) interference effects (Fresnel diffraction) to occur and manifest themselves as phase contrast in the image plane. Both soft tissue (chicken knee) and hard tissue (finger bone) samples are investigated for a range of source sizes and object-to-image distances, encompassing conditions somewhat analogous to conventional radiography. Variation in image contrast and resolution as a function of these variables is observed and discussed.

引用

页码：346 / 355

页数：10

共 26 条

[1] Low-dose phase contrast x-ray medical imaging [J].