Title Page
영문요약
Contents
Introduction 9
Materials and Methods 11
1. CT phantom 11
2. Study Population 11
3. Image Acquisition 12
4. Image Analysis 12
5. Measurement of CT contrast amount in the single kidney 13
6. Statistical Analysis 13
Results 14
1. Phantom Study 14
2. Patient Characteristics 14
3. Measurement of the Amount of Contrast Agent 14
4. Correlation between the contrast amount and CKD-EPI eGFR 18
Discussion 26
References 29
국문 요약 32
Table 1. Patient characteristics 17
Table 2. Correlations between the ratios of the amount of calculated and injected contrast agent and CKD-EPI eGFRs 22
Table 3. Correlations between the ratios of the calculated contrast amount to the mean HU value of renal artery and CKD-EPI eGFRs 25
Figure 1. CT image of phantom composed of twelve tubes with various iodine concentration. (A-L) 0.25, 0.5, 0.75, 1, 1.25, 1.5, 1.75, 2, 3, 4, 5, and 6 mg/mL 15
Figure 2. Scatterplot of mean CT HU value versus the iodine concentration with regression line 16
Figure 3. Correlations between the ratios of the amount of calculated and injected contrast agent and CKD-EPI eGFRs 20
Figure 4. Correlations between the ratios of the calculated contrast amount to the mean HU value of renal artery and CKD-EPI eGFRs 23