Fast local reconstruction by selective backprojection for low dose in dental computed tomography

Yan, Bin; Deng, Lin; Han, Yu; Zhang, Feng; Wang, Xianchao; Li, Lei

doi:10.1088/1674-1137/38/10/108201

Cited by 6 publications

(1 citation statement)

References 24 publications

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“…Cone-beam x-ray computed tomography(CBCT) is playing an indispensable role in applications of medical and nondestructive testing (Wang et al 2013b, Yan et al 2014. For the reconstruction of cone-beam CT, the geometric parameters of the acquisition system must be known in advance (Wang et al 2013a).…”

Section: Introductionmentioning

confidence: 99%

A method to determine the detector locations of the cone-beam projection of the balls’ centers

Deng

et al. 2015

Phys. Med. Biol.

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In geometric calibration of cone-beam computed tomography (CBCT), sphere-like objects such as balls are widely imaged, the positioning information of which is obtained to determine the unknown geometric parameters. In this process, the accuracy of the detector location of CB projection of the center of the ball, which we call the center projection, is very important, since geometric calibration is sensitive to errors in the positioning information. Currently in almost all the geometric calibration using balls, the center projection is invariably estimated by the center of the support of the projection or the centroid of the intensity values inside the support approximately. Clackdoyle's work indicates that the center projection is not always at the center of the support or the centroid of the intensity values inside, and has given a quantitative analysis of the maximum errors in evaluating the center projection by the centroid. In this paper, an exact method is proposed to calculate the center projection, utilizing both the detector location of the ellipse center and the two axis lengths of the ellipse. Numerical simulation results have demonstrated the precision and the robustness of the proposed method. Finally there are some comments on this work with non-uniform density balls, as well as the effect by the error occurred in the evaluation for the location of the orthogonal projection of the cone vertex onto the detector.

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Section: Introductionmentioning

confidence: 99%

A method to determine the detector locations of the cone-beam projection of the balls’ centers

Deng

et al. 2015

Phys. Med. Biol.

View full text Add to dashboard Cite

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Adsorption accumulation of natural gas based on microporous carbon adsorbents of different origin

et al. 2017

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Optimization of structural and energy characteristics of adsorbents for methane storage

et al. 2018

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Fast local reconstruction by selective backprojection for low dose in dental computed tomography

Abstract: Fast local reconstruction by selective backprojection for low dose in dental computed tomography * YAN Bin( ) 1) DENG Lin( ) 2) HAN Yu( ) ZHANG Feng( ) WANG Xian-Chao ( ) LI Lei( ) 3)

Cited by 6 publications

References 24 publications

A method to determine the detector locations of the cone-beam projection of the balls’ centers

A method to determine the detector locations of the cone-beam projection of the balls’ centers

Adsorption accumulation of natural gas based on microporous carbon adsorbents of different origin

Optimization of structural and energy characteristics of adsorbents for methane storage

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