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KMID : 1151820190130050705
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Journal of the Korean Society of Radiology
2019 Volume.13 No. 5 p.705 ~ p.711
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Changes in Image Quality and Dose according to Exposure Parameters of Brain CT
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Choi Seok-Yoon
Im In-Chul
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Abstract
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Currently, the brain CT scan of the latest equipment lacks the study of parameter change and dose change and especially of noise, uniformity analysis and dose change. Therefore, this study attempted to study the phenomenon that occurs at this time by analyzing tube voltage, slice thickness, and pitch change in exposure parameters when using high specification CT. Experimental results show that uniformity is better when using high voltage, thick slice thickness selection, and minimum pitch. As a result of the combination, the most uniformity condition was 140 kVp, 10 mm and pitch 0.5. Noise was found to be improved regardless of pitch by increasing tube voltage and slice thickness. The radiation dose increased linearly with tube voltage and pitch. Therefore, the results of this study will serve as a reference for the use of High specification brain CT.
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KEYWORD
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Tube voltage, Slice thickness, Pitch, Uniformity
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