Abstract
Ring artifacts in computed tomography (CT) images degrade image quality and obscure the true shapes of objects. While several correction methods have been developed, their performances are often taskdependent and not generally applicable. Here, we propose a novel method to reduce ring artifacts by calculating the ratio of adjacent detector elements in the projection data, termed the line-ratio. Our method estimates the sensitivity of each detector element and equalizes them in sinogram space. As a result, the stripe pattern can be effectively removed from sinogram data, thereby also removing ring artifacts from the reconstructed CT image. Numerical simulations were performed to evaluate and compare the performance of our method with that of conventional methods. We also tested our method experimentally and demonstrated that our method has superior performance to other methods.
| Original language | English |
|---|---|
| Pages (from-to) | 13380-13392 |
| Number of pages | 13 |
| Journal | Optics Express |
| Volume | 22 |
| Issue number | 11 |
| DOIs | |
| Publication status | Published - 2014 Jan 1 |
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All Science Journal Classification (ASJC) codes
- Atomic and Molecular Physics, and Optics
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Ring artifact correction using detector lineratios in computed tomography. / Kim, Younguk; Baek, Jongduk; Hwang, Do Sik.
In: Optics Express, Vol. 22, No. 11, 01.01.2014, p. 13380-13392.Research output: Contribution to journal › Article
TY - JOUR
T1 - Ring artifact correction using detector lineratios in computed tomography
AU - Kim, Younguk
AU - Baek, Jongduk
AU - Hwang, Do Sik
PY - 2014/1/1
Y1 - 2014/1/1
N2 - Ring artifacts in computed tomography (CT) images degrade image quality and obscure the true shapes of objects. While several correction methods have been developed, their performances are often taskdependent and not generally applicable. Here, we propose a novel method to reduce ring artifacts by calculating the ratio of adjacent detector elements in the projection data, termed the line-ratio. Our method estimates the sensitivity of each detector element and equalizes them in sinogram space. As a result, the stripe pattern can be effectively removed from sinogram data, thereby also removing ring artifacts from the reconstructed CT image. Numerical simulations were performed to evaluate and compare the performance of our method with that of conventional methods. We also tested our method experimentally and demonstrated that our method has superior performance to other methods.
AB - Ring artifacts in computed tomography (CT) images degrade image quality and obscure the true shapes of objects. While several correction methods have been developed, their performances are often taskdependent and not generally applicable. Here, we propose a novel method to reduce ring artifacts by calculating the ratio of adjacent detector elements in the projection data, termed the line-ratio. Our method estimates the sensitivity of each detector element and equalizes them in sinogram space. As a result, the stripe pattern can be effectively removed from sinogram data, thereby also removing ring artifacts from the reconstructed CT image. Numerical simulations were performed to evaluate and compare the performance of our method with that of conventional methods. We also tested our method experimentally and demonstrated that our method has superior performance to other methods.
UR - http://www.scopus.com/inward/record.url?scp=84901851166&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84901851166&partnerID=8YFLogxK
U2 - 10.1364/OE.22.013380
DO - 10.1364/OE.22.013380
M3 - Article
AN - SCOPUS:84901851166
VL - 22
SP - 13380
EP - 13392
JO - Optics Express
JF - Optics Express
SN - 1094-4087
IS - 11
ER -