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Pediatric head computed tomography with advanced modeled iterative reconstruction: focus on image quality and reduction of radiation dose

Title
Pediatric head computed tomography with advanced modeled iterative reconstruction: focus on image quality and reduction of radiation dose
Authors
Cho H.-H.Lee S.M.You S.K.
Ewha Authors
조현혜
Issue Date
2020
Journal Title
Pediatric Radiology
ISSN
0301-0449JCR Link
Citation
Pediatric Radiology vol. 50, no. 2, pp. 242 - 251
Keywords
BrainChildrenComputed tomographyImage qualityIterative reconstructionRadiation dose
Publisher
Springer
Indexed
SCI; SCIE; SCOPUS scopus
Document Type
Article
Abstract
Background: Iterative reconstruction has become the standard method for reconstructing computed tomography (CT) scans and needs to be verified for adaptation. Objective: To assess the image quality after adapting advanced modeled iterative reconstruction (ADMIRE) for pediatric head CT. Materials and methods: We included image sets with filtered back projection reconstruction (the cFBP group, n=105) and both filtered back projection and ADMIRE reconstruction (the lower-dose group, n=109) after dose reduction. All five strength levels of ADMIRE and filtered back projection were adapted for the lower-dose group and compared with the cFBP group. Quantitative parameters including noise, signal-to-noise ratio and contrast-to-noise ratio and qualitative parameters including noise, white matter and gray matter differentiation of the supra- and infratentorial levels, sharpness, artifact, and diagnostic accuracy were also evaluated and compared with interobserver agreement. Results: There was a mean dose reduction of 30.6% in CT dose index volume, 32.1% in dose length product, and 32.1% in effective dose after tube current reduction. There was gradual reduction of noise in air, cerebrospinal fluid and white matter with strength levels of ADMIRE from 1 to 5 (P<0.001). Signal-to-noise ratio and contrast-to-noise ratio in all age groups increased among strength levels of ADMIRE, in sequence from 1 to 5, with statistical significance (P<0.001). Gradual reduction of qualitative parameters was noted among strength levels of ADMIRE in sequence from 1 to 5 (P<0.001). Conclusion: Use of ADMIRE for pediatric head CT can reduce radiation dose without degrading image quality. © 2019, Springer-Verlag GmbH Germany, part of Springer Nature.
DOI
10.1007/s00247-019-04532-z
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