Micro-focus in-line X-ray phase contrast imaging experiment and phase recovery reconstruction(PDF)
《中国医学物理学杂志》[ISSN:1005-202X/CN:44-1351/R]
- Issue:
- 2018年第9期
- Page:
- 1050-1055
- Research Field:
- 医学影像物理
- Publishing date:
Info
- Title:
- Micro-focus in-line X-ray phase contrast imaging experiment and phase recovery reconstruction
- Author(s):
- ZHANG Xiajing1; XIA Tian2; HE Peizhong3
- 1. School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China;
2. Key Laboratory of Magnetic Resonance, East China Normal University, Shanghai 200062, China; 3. Shanghai University of
Medicine & Health Sciences, Shanghai 201318, China
- Keywords:
- Keywords: X-ray; phase contrast imaging; micro-focus; edge enhancement; phase extraction
- PACS:
- R312;TP434
- DOI:
- 10.3969/j.issn.1005-202X.2018.09.011
- Abstract:
- Abstract: Objective To perform phase contrast imaging experiment and phase information extraction based on micro-focus Xray
source. Methods Based on Fresnel-Kirchhoff diffraction theory and considering the effects of spatial coherence and temporal
coherence, the general formula of continuous X-ray phase contrast imaging was derived. According to the method of extracting
pure phase information from the images containing phase information and absorption information, the phase contrast images were
processed with MATLAB. Results In experiment 1, phase contrast imaging was conducted on a plastic straw. By changing the
distance between the detector and the sample, the images which were clearer and larger than those obtained by traditional X-ray
imaging and highlighted the boundary information were obtained. In experiment 2, the phase contrast images of borosilicate glass
at tube voltage of 45 kVp and 70 kVp were obtained and then the phase contrast images containing pure phase information were
obtained through phase recovery reconstruction. Conclusion For light elements, micro-focus in-line X-ray phase contrast imaging
is superior to traditional X-ray phase contrast imaging in image resolution and image contrast. The technology of phase information
extraction will greatly promote the applications of X-ray phase contrast imaging in general laboratory and clinical tumor detection.
Last Update: 2018-09-28