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.