Varying Collimation for Dark-Field Extraction
Joint Authors
Shen, Haiou
Cong, Wenxiang
Zou, Yu
Wang, G.
Source
International Journal of Biomedical Imaging
Issue
Vol. 2009, Issue 2009 (31 Dec. 2009), pp.1-7, 7 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2010-02-16
Country of Publication
Egypt
No. of Pages
7
Main Subjects
Abstract EN
Although x-ray imaging is widely used in biomedical applications, biological soft tissues have small density changes, leading to low contrast resolution for attenuation-based x-ray imaging.
Over the past years, x-ray small-angle scattering was studied as a new contrast mechanism to enhance subtle structural variation within the soft tissue.
In this paper, we present a detection method to extract this type of x-ray scattering data, which are also referred to as dark-field signals.
The key idea is to acquire an x-ray projection multiple times with varying collimation before an x-ray detector array.
The projection data acquired with a collimator of a sufficiently high collimation aspect ratio contain mainly the primary beam with little scattering, while the data acquired with an appropriately reduced collimation aspect ratio include both the primary beam and small-angle scattering signals.
Then, analysis of these corresponding datasets will produce desirable dark-field signals; for example, via digitally subtraction.
In the numerical experiments, the feasibility of our dark-field detection technology is demonstrated in Monte Carlo simulation.
The results show that the acquired dark field signals can clearly reveal the structural information of tissues in terms of Rayleigh scattering characteristics.
American Psychological Association (APA)
Wang, G.& Cong, Wenxiang& Shen, Haiou& Zou, Yu. 2010. Varying Collimation for Dark-Field Extraction. International Journal of Biomedical Imaging،Vol. 2009, no. 2009, pp.1-7.
https://search.emarefa.net/detail/BIM-502975
Modern Language Association (MLA)
Wang, G.…[et al.]. Varying Collimation for Dark-Field Extraction. International Journal of Biomedical Imaging No. 2009 (2009), pp.1-7.
https://search.emarefa.net/detail/BIM-502975
American Medical Association (AMA)
Wang, G.& Cong, Wenxiang& Shen, Haiou& Zou, Yu. Varying Collimation for Dark-Field Extraction. International Journal of Biomedical Imaging. 2010. Vol. 2009, no. 2009, pp.1-7.
https://search.emarefa.net/detail/BIM-502975
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-502975