Table 4 First level of analysis using CT-Expo: organ dose variations found according to slice thickness, pitch, collimation and scanner model. For the slice thickness, we compared 1 and 3 mm, keeping the latter as reference. We set pitch at 0.8, 1.0, and 1.4 (with 1.4 as reference), collimation at 19.2 and 40.0 mm (with 19.2 mm as reference). For each organ, we calculated the discrepancies as difference of the values obtained. These discrepancies were then normalised to the organ dose at reference condition. We reported here only the minimum and the maximum values of discrepancy found for each class of organs subdivided according to the position relative to the scan region

From: Patient organ and effective dose estimation in CT: comparison of four software applications