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Infant Cardiac CT Angiography with 64-Slice and 256-Slice CT: Comparison of Radiation Dose and Image Quality Using a Pediatric Phantom
Lee Y.-W.1,2; Yang C.-C.3; Mok G.S.P.4; Wu T.-H.1
2012-11-21
Source PublicationPLoS ONE
ISSN19326203
Volume7Issue:11
Abstract

Background: The aims of this study were to investigate the image quality and radiation exposure of pediatric protocols for cardiac CT angiography (CTA) in infants under one year of age. Methodology/Principal Findings: Cardiac CTA examinations were performed using an anthropomorphic phantom representing a 1-year-old child scanned with non-electrocardiogram-gated (NG), retrospectively electrocardiogram-gated helical (RGH) and prospectively electrocardiogram-gated axial (PGA) techniques in 64-slice and 256-slice CT scanners. The thermoluminescent dosimeters (TLD) were used for direct organ dose measurement, while dose-length product and effective mAs were also used to estimate the patient dose. For image quality, noise and signal-to-noise-ratio (SNR) were assessed based on regions-of-interest drawn on the reconstructed CT images, and were compared with the proposed cardiac image quantum index (CIQI). Estimated dose results were in accordant to the measured doses. The NG scan showed the best image quality in terms of noise and SNR. The PGA scan had better image quality than the RGH scan with 83.70% dose reduction. Noise and SNR were also corresponded to the proposed CIQI. Conclusions/Significance: The PGA scan protocol was a good choice in balancing radiation exposure and image quality for infant cardiac CTA. We also suggested that the effective mAs and the CIQI were suitable in assessing the tradeoffs between radiation dose and image quality for cardiac CTA in infants. These results are useful for future implementation of dose reduction strategies in pediatric cardiac CTA protocols. © 2012 Lee et al.

DOI10.1371/journal.pone.0049609
URLView the original
Indexed BySCIE
Language英语
WOS Research AreaScience & Technology - Other Topics
WOS SubjectMultidisciplinary Sciences
WOS IDWOS:000311821000067
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Cited Times [WOS]:9   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionFaculty of Health Sciences
Corresponding AuthorWu T.-H.
Affiliation1.Department of Biomedical Imaging and Radiological Sciences, National Yang Ming University, Taipei, Taiwan
2.Department of Radiology, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan
3.Department of Radiological Technology, Tzu Chi college of Technology, Hualien, Taiwan
4.Department of Electrical and Electronics Engineering, Faculty of Science and Technology, University of Macau, Macau, China
Recommended Citation
GB/T 7714
Lee Y.-W.,Yang C.-C.,Mok G.S.P.,et al. Infant Cardiac CT Angiography with 64-Slice and 256-Slice CT: Comparison of Radiation Dose and Image Quality Using a Pediatric Phantom[J]. PLoS ONE,2012,7(11).
APA Lee Y.-W.,Yang C.-C.,Mok G.S.P.,&Wu T.-H..(2012).Infant Cardiac CT Angiography with 64-Slice and 256-Slice CT: Comparison of Radiation Dose and Image Quality Using a Pediatric Phantom.PLoS ONE,7(11).
MLA Lee Y.-W.,et al."Infant Cardiac CT Angiography with 64-Slice and 256-Slice CT: Comparison of Radiation Dose and Image Quality Using a Pediatric Phantom".PLoS ONE 7.11(2012).
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