Chest CT at a dose below 0.3 mSv: impact of iterative reconstruction on image quality and lung analysis.
Details
Serval ID
serval:BIB_4D2E3F5EA1C6
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Chest CT at a dose below 0.3 mSv: impact of iterative reconstruction on image quality and lung analysis.
Journal
Acta radiologica (Stockholm, Sweden : 1987)
ISSN
1600-0455 (Electronic)
ISSN-L
0284-1851
Publication state
Published
Issued date
03/2016
Peer-reviewed
Oui
Volume
57
Number
3
Pages
311-317
Language
english
Notes
Publication types: Journal Article
Publication Status: ppublish
Publication Status: ppublish
Abstract
In chest computed tomography (CT), iterative reconstruction (IR) algorithms maintain diagnostic image quality (IQ) while significantly reducing the dose.
To evaluate the impact of IR on IQ of chest CT at effective doses below 0.3 mSv.
Twenty chest CT scans performed at effective dose below 0.3 mSv (CT1) were reconstructed varying three parameters: filtered back-projection and IR iDose(4) algorithms; 512 × 512 and 768 × 768 matrices; and sharp and soft kernels, thus generating eight series per patient. The qualitative evaluation of the IQ was performed by ranking series from 1 to 8 (8 corresponding to the highest rank) which was subsequently compared to quantitative assessment of IQ by using an appropriated merit formula. Intra- and inter-reader IQ ranking reliability was also evaluated using Cohen's kappa. Analysis of lung findings was finally compared between the best CT1 series and the reference CT (CT0).
The best series in terms of qualitative and quantitative IQ was obtained using IR, 512(2) matrix and soft kernel. The best CT1 series detected nodules greater than 4 mm with an almost perfect match with CT0.
Chest CT performed at effective doses below 0.3 mSv may be used to confidently diagnose lesions greater than 4 mm using iDose(4), soft kernel and 512 × 512 matrix.
To evaluate the impact of IR on IQ of chest CT at effective doses below 0.3 mSv.
Twenty chest CT scans performed at effective dose below 0.3 mSv (CT1) were reconstructed varying three parameters: filtered back-projection and IR iDose(4) algorithms; 512 × 512 and 768 × 768 matrices; and sharp and soft kernels, thus generating eight series per patient. The qualitative evaluation of the IQ was performed by ranking series from 1 to 8 (8 corresponding to the highest rank) which was subsequently compared to quantitative assessment of IQ by using an appropriated merit formula. Intra- and inter-reader IQ ranking reliability was also evaluated using Cohen's kappa. Analysis of lung findings was finally compared between the best CT1 series and the reference CT (CT0).
The best series in terms of qualitative and quantitative IQ was obtained using IR, 512(2) matrix and soft kernel. The best CT1 series detected nodules greater than 4 mm with an almost perfect match with CT0.
Chest CT performed at effective doses below 0.3 mSv may be used to confidently diagnose lesions greater than 4 mm using iDose(4), soft kernel and 512 × 512 matrix.
Keywords
Adult, Aged, Aged, 80 and over, Female, Humans, Image Processing, Computer-Assisted, Lung/diagnostic imaging, Lung Neoplasms/diagnostic imaging, Male, Middle Aged, Radiation Dosage, Radiographic Image Enhancement, Radiographic Image Interpretation, Computer-Assisted, Reproducibility of Results, Sensitivity and Specificity, Tomography, X-Ray Computed, Reduced dose chest computed tomography, image quality, iterative reconstruction, pulmonary nodules
Pubmed
Web of science
Create date
20/04/2015 15:02
Last modification date
20/08/2019 14:01
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