Head and Neck Imaging
Application Value of 256-slice iCT Associated with iDose 4 I t e r a t i v e Reconstruction Technique in Chest Low dose CT*
Author：ZHAO Bo, LIU Yong-li, LI Jing-jing.
affiliation：Department of CT, the First Hospital of Qinhuangdao, Qinhuangdao 066000, Hebei Province, China
PDFAbstract
Objective To evaluate application value of 256-slice iCT associated with iDose4 iterative reconstruction technique in chest low dose CT. Methods 150 patients were randomly assigned into three groups: 100 mAs group as control group (n=50),50 mAs group (n=50), and 25 mAs group (n=50). Images from control group were reconstructed by FBP, and low dose groups were reconstructed by FBP and iDose4 . Quantitative noise, SNR, CNR, subjectively image quality, and radiation dose were compared and analyzed statistically. Results The subjectively image quality of low dose groups have no statistical significance compared with control group. MSD, CNR and SNR in 50 mAs with iDose4 were improved compared with control group(P<0.05). MSD, CNR and SNR in 25 mAs with iDose4 have no statistical significance compared with control group. Radiation dose were respectively reduced by 53.3％ and 76.4％ In 50mAs and 25 mAs. Conclusion Compared with FBP, 50mAs and 25 mAs groups with iDose4 could maintain or improve image quality on chest CT while reducing radiation dose effectively.
【Keyword】Radiation Dose; Tomography, X-ray Computed; Iterative Reconstruction; Chest
【Chart number】R445.3
【Document Identification Number】A
【DOI】 10.3969/j.issn.1672- 5131.2016.12.020
Chinese journal of CT and MRI
th14Volume， th 12 Issue
2016Year12Month
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