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Optical Engineering • Open Access

Feasibility study on many-view under-sampling technique for low-dose computed tomography
Author(s): Seungryong Cho; Taewon Lee; Jonghwan Min; Hyekyun Chung

Paper Abstract

We proposed a novel scanning method for low-dose computed tomography (CT) that uses an oscillating multi-slit collimator between the x-ray source and the patient. It can be thought as a realization of sparse data sampling that does not require a fast x-ray power switching. A simulation study was performed based on experimentally acquired microCT data of a mouse to demonstrate the feasibility of the proposed method. A numerical collimation was designed to leave only one-fourth of each projection data for use in image reconstruction. A total-variation minimization algorithm was implemented for image reconstruction from the sparely sampled data. We have successfully shown that the proposed method provides a viable option to low-dose CT.

Paper Details

Date Published: 2 August 2012
PDF: 4 pages
Opt. Eng. 51(8) 080501 doi: 10.1117/1.OE.51.8.080501
Published in: Optical Engineering Volume 51, Issue 8
Show Author Affiliations
Seungryong Cho, KAIST (Korea, Republic of)
Taewon Lee, KAIST (Korea, Republic of)
Jonghwan Min, KAIST (Korea, Republic of)
Hyekyun Chung, KAIST (Korea, Republic of)


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