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KMID : 1151820210150071065
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Journal of the Korean Society of Radiology
2021 Volume.15 No. 7 p.1065 ~ p.1072
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Evaluation of Image Quality and Radiation Dose for Filtered Back-Projection and Iterative Reconstruction Algorithm in Abdominal Computed Tomography Protocol
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Oh Jeong-Min
Seo Hyeon-Ji
Kim Yung-Kyoon
Han Dong-Kyoon
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Abstract
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In Computed Tomography, abdominal examination showed the highest proportion of use, and effort of reducing the radiation dose is required. Recently introduced Iterative Reconstruction(IR) is repetitive reconstruction technique of Computed Tomography. SIEMENS' IR, ADMIRE and GE's IR, ASIR-V, were used in this examination. Noise, % Contrast, and High contrast resolution were measured by using ACR phantom for image quality evaluation. In addition, CTDIvol and DLP displayed in the CT device were used for dose evaluation. When FBP and IR were compared, stage 2 to stage 5 of ADMIRE and 10, 30, 50, 70, and 90% of ASIR-V were applied, noise could be reduced from a minimum of 0.46 to a maximum of 2.38 in ADMIRE compared to FBP, and noise from a minimum of 0.51 to a maximum of 2.5 in ASIR-V compared to FBP. Also, % Contrast and High contrast resolution of FBP and IR were no statistical difference. When IR was used for abdominal CT examination, the radiation dose of ADMIRE is reduced by 25.39% compared to the radiation dose of FBP. Also, the radiation dose of ASIR-V is reduced by 16.61% compared to the radiation dose of FBP. In conclusion, it is believed that if IR is applied during abdominal CT examination, the radiation dose can be reduced without deteriorating the image quality.
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KEYWORD
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Image Quality , Radiation Dose , FBP , ADMIRE , ASIR-V
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