2011 Fiscal Year Final Research Report
Reduction of X-ray exposure and contrast material dose at abdominal CT using low kV or plural kV setting
| Project/Area Number |
21591565
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Radiation science
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| Research Institution | Hiroshima University |
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Principal Investigator |
AWAI Kazuo 広島大学, 大学院・医歯薬学総合研究科, 教授 (30294573)
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| Co-Investigator(Kenkyū-buntansha) |
YANAGA Yumi 熊本大学, 大学院・生命科学研究部, 助教 (40452891)
FUNAMA Yoshinori 熊本大学, 大学院・生命科学研究部, 助教 (30380992)
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| Project Period (FY) |
2009 – 2011
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| Keywords | CT / 管電圧 / コントラスト / X線被曝 |
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| Research Abstract |
We performed phantom experiment with CT. The phantom simulated adult abdomen and included water and iodine solution with 0-12 mg/ dl. The phantom was scanned with various tube voltage(80, 100, 120, 140 kVp) and tube current setting(30-200mA). We investigated noise value, contrast-noise-ration, figure of merit, noise power spectrum, visual contrast resolution. We also investigated the effect of image filters and reconstruction algorithm. The CNR and visual contrast resolution was the most acceptable at 80 kVp scanning, however, noise was mostly increased at 80 kVp scan and noise reduction by image filters or dedicated reconstruction algorithm was necessary. We also performed clinical studies as to low kV CT scanning.
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