Feasibility of model-based iterative reconstruction in 80 kV low-radiation chest CT in children
10.13929/j.1003-3289.201608014
- VernacularTitle:基于模型的迭代重建算法应用于80kV低剂量儿童胸部CT的可行性
- Author:
Jihang SUN
;
Jie YIN
;
Zhimin LIU
;
Haoyan LI
;
Dong GUO
;
Jun CAO
;
Yun PENG
- Keywords:
Tomography,X ray computed;
Iterative reconstruction;
Child;
Image processing,computer-assisted
- From:
Chinese Journal of Medical Imaging Technology
2017;33(4):599-602
- CountryChina
- Language:Chinese
-
Abstract:
Objective To evaluate the feasibility of model-based iterative reconstruction (MBIR) in low-dose chest CT (80 kV) examination in children.Methods Forty-four children who had post-operation scoliosis and received low dose chest CT scans were included.The fix tube voltage was 80 kV,fix current was 50 mA.Images were reconstructed with MBIR (observation group).The pre-operation scan were used 120 kV and 50 mA for acquisition,and images were reconstructed with filtered back-projection (FBP) mehed (control group).The subjective quality of the images was independently evaluated by two radiologists.Objective noises in the muscle and lung field were measured,the SNR,CNR were calculated,and the CTDIvol was record.Results The subjective noise score in the observation group was significantly higher than that in the control group (P＜0.05).Objective noise reduced about 40.36％,SNR increased 72.37％,CNR increased 78.69％,CTDIvol decreased by 66.52％,all of which had statistical difference between both groups (all P＜0.001).Conclusion Low-dose chest CT (80 kV) examination in children can meet the requirements of diagnosis for children.
