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KMID : 1151820210150030293
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Journal of the Korean Society of Radiology
2021 Volume.15 No. 3 p.293 ~ p.299
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Usefulness of Application of Tube Voltage Changes to Reduce Patient Dose during Abdominal CT Follow up
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Yoon Joon
Kim Hyeon-Ju
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Abstract
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In order to reduce the irresistible radiation exposure of patients who perform periodic examinations using a CT among various scan parameters a method to reduce patient dose was investigated through changes in the tube voltage close to X-ray penetrating power. As a result of the experiment 100 kVp was applied instead of 120 kVp which is commonly used in clinical practice and CTDI decreased by about 41% during scan. In addition the degree of change in image quality was measured as 1046.1±3.7 HU for CT value and 71.4±7.9 for Pixel value and statistical analysis showed no significant difference (0.05
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KEYWORD
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Abdomen CT, Kilo_voltage, CTDI, Image quality, CT scan
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