| NING Pei-gang,SHI Da-peng,CHENG Xiao-jun,LÜ Yu-min,ZHU Shao-cheng.A phantom study of dose reduction potential in pelvic CT with advanced iterative reconstruction algorithms[J].Chinese Journal of Radiological Medicine and Protection,2013,33(5):547-550 |
| A phantom study of dose reduction potential in pelvic CT with advanced iterative reconstruction algorithms |
| Received:January 11, 2013 |
| DOI：10.3760/cma.j.issn.0254-5098.2013.05.026 |
| KeyWords:Tomography Radiation dose Reconstruction algorithm Iterative |
| FundProject:"河南省中青年科技创新人才工程"专项基金(201052) |
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| 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 (CTDIvol) 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. |
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