Search engine for discovering works of Art, research articles, and books related to Art and Culture
ShareThis
Javascript must be enabled to continue!

Projection-domain iteration to estimate unreliable measurements

View through CrossRef
AbstractDue to the beam-hardening effect of the broad energy spectrum of the X-ray source in computed tomography, the reconstructed images usually suffer from severe artifacts when metallic objects are being imaged. Metal artifact correction methods are usually sophisticated and not practical, especially in some non-medical applications, in which the linear attenuation coefficients are unknown. This paper suggests a simple and effective algorithm to estimate the unreliable measurements. The proposed algorithm is an iterative algorithm, in which the iteration is performed in the projection domain, while the objective function is set up in the image domain. The final image is reconstructed with the conventional filtered backprojection algorithm. The feasibility of the proposed method is verified with airport bags that contain some unknown metals.
Title: Projection-domain iteration to estimate unreliable measurements
Description:
AbstractDue to the beam-hardening effect of the broad energy spectrum of the X-ray source in computed tomography, the reconstructed images usually suffer from severe artifacts when metallic objects are being imaged.
Metal artifact correction methods are usually sophisticated and not practical, especially in some non-medical applications, in which the linear attenuation coefficients are unknown.
This paper suggests a simple and effective algorithm to estimate the unreliable measurements.
The proposed algorithm is an iterative algorithm, in which the iteration is performed in the projection domain, while the objective function is set up in the image domain.
The final image is reconstructed with the conventional filtered backprojection algorithm.
The feasibility of the proposed method is verified with airport bags that contain some unknown metals.

Related Results

Like Me or Like Us
Like Me or Like Us
Research has shown abundant evidence for social projection, that is, the tendency to expect similarity between oneself and others ( Krueger, 1998a , 1998b ). This effect is stronge...
Laboratory measurements of high-frequency broadband acoustic backscatter from sea ice, oil under sea ice, and oil encapsulated in sea ice
Laboratory measurements of high-frequency broadband acoustic backscatter from sea ice, oil under sea ice, and oil encapsulated in sea ice
To investigate the potential for detection of crude oil under sea ice using active acoustics techniques, measurements of high-frequency broadband backscattering (75–590 kHz) from c...
Comparative analysis of information tendency and application features for projection mapping technologies at cultural heritage sites
Comparative analysis of information tendency and application features for projection mapping technologies at cultural heritage sites
AbstractWith the rapid development of interactive technologies using projection mapping (PJM), these digital technologies have introduced new interpretative possibilities for the p...
L'apprentissage de l'itération dans deux environnements informatiques
L'apprentissage de l'itération dans deux environnements informatiques
Cet article présente une étude comparée de l'apprentissage de l'itération dans deux environnements informatiques différents : Pascal et Multiplan. Cette étude a été réalisée avec d...
Theoretical and Empirical Foundations for a Unified Pyramid of Human Motivation
Theoretical and Empirical Foundations for a Unified Pyramid of Human Motivation
AbstractRevisions are proposed to the taxonomic model of human motivation of Forbes (Review of General Psychology, 15(2), 85-98, 2011) in order to incorporate a heretofore missing ...
Tire noise from open grid bridge decks
Tire noise from open grid bridge decks
Having identified that the contribution to the overall noise from the grid vibrations is insignificant, the attention is focused on the noise radiated from the vibrations of the ti...

Recent Results

A flavor symmetry model for bilarge leptonic mixing and the lepton masses
A flavor symmetry model for bilarge leptonic mixing and the lepton masses
We present a model for leptonic mixing and the lepton masses based on flavor symmetries and higher-dimensional mass operators. The model predicts bilarge leptonic mixing (i.e., the...
Comparative modeling of the H4-H5-loop of the α2-isoform of Na+/K+-ATpase α-subunit in the E1 conformation
Comparative modeling of the H4-H5-loop of the α2-isoform of Na+/K+-ATpase α-subunit in the E1 conformation
Restraint-based comparative modeling was used for calculation and visualization of the H4-H5-loop of Na+/K+-ATPase from mouse brain (Mus musculus, adult male brain, α2-isoform) bet...
Thomas Decker and the death of Boss Coker
Thomas Decker and the death of Boss Coker
Opening ParagraphThomas Alexander Leighton Decker,o.b.e., teacher, journalist, broadcaster, poet, dramatist, linguist and senior civil servant—to name only some of the major occupa...

Back to Top