Application of Iterative Reconstruction in Low-dose Chest CT Scans of Preschool Children
XIONG Shan
XU Lei
CHENG Jian-min
CHEN Bo
ZHENG Li
DAI Ting-ting
LIU Si-bin
HUANG Yuan-yi
Abstract：Objective: To explore the feasibility of iDose4 iterative reconstruction technique in low-dose chest CT scans of preschool children. Methods: One hundred and fifty patients underwent non-contrast chest CT examinations, they were randomly assigned into three groups: control group(standard dose protocol 120 kV, 50 mAs) (n = 50); 25 mAs group (low dose protocol 120 kV, 25 mAs) (n = 50); and 10 mAs group (low dose protocol 120 kV, 10 mAs) (n = 50). Images from control group were reconstructed by FBP, and low-dose groups were reconstructed by FBP and iDose4. Subjective image quality was assessed by two associate chief physicians of radiology department in a blinded manner. Image quality and radiation dose of the 3 groups were compared and analyzed statistically. Results: Subjective and objective image quality in 25 mAs group with iDose4 compared with FBP was increased. Subjective and objective image quality in 10 mAs group with iDose4 compared with FBP was increased either. Subjective and objective image quality in 25 mAs with iDose4 was increased compared with control group. Subjective and objective image quality has no significant statistical difference between 10 mAs with iDose4 and control group. Effective dose in low dose groups 50 mAs and 25 mAs was decreased by 52.6%and 78.2% respectively. Conclusions: 50 and 25 mAs groups with iDose4 technique (iDose4-5) could obtain acceptable image quality in low-dose chest CT scans of preschool children while decreasing radiation dose.
Keywords：childlungtomographyX-ray computedradiation dose
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：8( 729-736 )