Document Detail


Artifacts on lung CT scans: removal with Fourier filtration.
MedLine Citation:
PMID:  2704825     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
A preliminary study was done of Fourier analysis of high-resolution computed tomographic (CT) images of normal pulmonary parenchyma. A two-dimensional fast Fourier transform was applied to 20 regions of interest (64 x 64 pixels) obtained from CT images of six lungs. A qualitative analysis of the spectra and the application of filters in the frequency domain allowed the characterization and removal of reconstruction artifacts. Selective application of a low-pass filter removed these parasitic frequencies and clearly enhanced the quality of the image.
Authors:
O Helenon; D S Chanin; M Laval-Jeantet; J Frija
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Radiology     Volume:  171     ISSN:  0033-8419     ISO Abbreviation:  Radiology     Publication Date:  1989 May 
Date Detail:
Created Date:  1989-05-19     Completed Date:  1989-05-19     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  0401260     Medline TA:  Radiology     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  572-4     Citation Subset:  AIM; IM    
Affiliation:
Laboratory of Experimental Radiology, Faculty of Medicine Lariboisiere, Paris, France.
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MeSH Terms
Descriptor/Qualifier:
Filtration / methods
Fourier Analysis
Humans
Lung / radiography*
Radiographic Image Enhancement / methods*
Tomography, X-Ray Computed / methods*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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