A general exact method for synthesizing parallel-beam projections from cone-beam projections via filtered backprojection.

A general exact method for synthesizing parallel-beam projections from cone-beam projections via filtered backprojection. Research Abstract Details 

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A general exact method for synthesizing parallel-beam projections from cone-beam projections via filtered backprojection. Abstract Text:

Liang Li,Zhiqiang Chen,Yuxiang Xing,Li Zhang,Kejun Kang,Ge Wang,

In recent years, image reconstruction methods for cone-beam computed tomography (CT) have been extensively studied. However, few of these studies discussed computing parallel-beam projections from cone-beam projections. In this paper, we focus on the exact synthesis of complete or incomplete parallel-beam projections from cone-beam projections. First, an extended central slice theorem is described to establish a relationship between the Radon space and the Fourier space. Then, data sufficiency conditions are proposed for computing parallel-beam projection data from cone-beam data. Using these results, a general filtered backprojection algorithm is formulated that can exactly synthesize parallel-beam projection data from cone-beam projection data. As an example, we prove that parallel-beam projections can be exactly synthesized in an angular range in the case of circular cone-beam scanning. Interestingly, this angular range is larger than that derived in the Feldkamp reconstruction framework. Numerical experiments are performed in the circular scanning case to verify our method.

A general exact method for synthesizing parallel-beam projections from cone-beam projections via filtered backprojection. Publishing Authors By Initials

L Li,Z Chen,Y Xing,L Zhang,K Kang,G Wang,

For similar tomography, x-ray computed research abstracts see: tomography, x-ray computed research

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A general exact method for synthesizing parallel-beam projections from cone-beam projections via filtered backprojection. Journal Published:

PUBLICATION TYPE: Research Support, Non-U.S. Gov

Journal: Physics in medicine and biology

VOLUME: 51

Page Numbers: 5643-54

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ISSN: 0031-9155

DAY: 16

MONTH: 10

YEAR: 2006

A general exact method for synthesizing parallel-beam projections from cone-beam projections via filtered backprojection. Information

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LANGUAGE: eng

NlmUniqueID: 401220

A general exact method for synthesizing parallel-beam projections from cone-beam projections via filtered backprojection. Keywords Mesh Terms:

KEYWORDS: Tomography, X-Ray Computed

MESH TERMS: methods

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Grant and Affiliation Information for A general exact method for synthesizing parallel-beam projections from cone-beam projections via filtered backprojection.

AFFILIATION: Department of Engineering Physics, Tsinghua University, Beijing 100084, People's Republic of China. liliang02@mails.tsinghua.edu.cn

Country: England

AGENCY: United States NIBIB

GRANT: EB004287

ACRONYM: EB

MEDLINETA: Phys Med Biol

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