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KMID : 0357520160390010071
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Journal of Radiological Science and Technology
2016 Volume.39 No. 1 p.71 ~ p.79
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Evaluation of the Low Tube Voltage in the Computed Tomography Scan Technique using a Low Concentration Contrast Agent
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Jung Kang-Kyo
Cho Pyong-Kon
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Abstract
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The purpose of this study is computed tomography contrast agent at low concentrations and low tube voltage technique to evaluate the usefulness on the phantom image. By varying the degree of mixture by the contrast medium concentration it was inserted in phantom. It was taken by changing the tube voltage and tube current step by step, and to evaluate the dose and the CT value obtained from the phantom image. As a result, low-contrast, low tube voltage(300 mgI/ml, 100 kV) was reduced by an average 21%(CTDIvol; computed tomography dose indexvol) more standard condition(350 mgI/ml, 120 kV). SNR was increased at all depths of the phantom, respectively 1:10 and 1:20(by diluting a contrast agent and normal saline) 12.2(26%) 6.2(17%). CNR was increased at all depths of the phantom, respectively 1:10 and 1:20(by diluting a contrast agent and normal saline) 11.5(32%), 6.3(26%). Research work on the CT scan is necessary in a variety of studies on the low contrast concentration and low tube voltage techniques for dose reduction and reducing of side effects the contrast agent.
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KEYWORD
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Low contrast concentration , Low tube voltage , Attenuation coefficient
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