A phantom study of dose reduction potential in pelvic CT with advanced iterative reconstruction algorithms
10.3760/cma.j.issn.0254-5098.2013.05.026
- VernacularTitle:高级迭代重建算法降低盆腔CT剂量潜能的模体研究
- Author:
Peigang NING
;
Dapeng SHI
;
Xiaojun CHENG
;
Yumin Lü
;
Shaocheng ZHU
- Publication Type:Journal Article
- Keywords:
Tomography;
Radiation dose;
Reconstruction algorithm;
Iterative
- From:
Chinese Journal of Radiological Medicine and Protection
2013;33(5):547-550
- CountryChina
- Language:Chinese
-
Abstract:
Objective To assess the dose reduction potential of adaptive statistical iterative reconstruction(ASiR)and model-based iterative reconstruction(MBIR)in pelvic CT with a standard male phantom.Methods A Fluke Biomedical RANDO standard male phantom was scanned with discovery CT750 HD using different tube currents.CT images were reconstructed with FBP,50％ASiR and MBIR.The CT value,the image noise and the contrast-to-noise ratio(CNR)for the sacral vertebra relative to muscle were measured.The volume CT dose indexes(CTDIvo1)and dose-length product(DLP)were recorded.Results Compared with FBP,using 50％ASiR and MBIR had significant reduced image noise and greater CNR.The effective minimal tube currents for displaying sacral vertebra were 250 mA(FBP),180 mA(50％ASiR),and 100 mA(MBIR).With the similar image quality using FBP,the dose was reduced by 28.0％ and 59.9％ using 50％ASiR and MBIR,respectively.Conclusions Using advanced iterative algorithms can reduce image noise,improve CNR,and reduce the radiation dose in pelvic CT examination.
