Table 5 Distribution of ranges, standard deviation (SD) and mean values of dose length product (DLP), Computed Tomography Dose Index (CTDIvol) and size specific dose estimate (SSDE)
From: Image quality and pathology assessment in CT Urography: when is the low-dose series sufficient?
Phase | DLP mGy .cm | CTDIvol mGy | SSDE mGy |
|---|---|---|---|
Native | |||
Mean | 135.7 | 2.84 | 3.51 |
SD | 38.3 | 0.73 | 0.79 |
Range | 63.8–257.6 | 1.45–5.39 | 2.28–6.93 |
Nephrogram | |||
Mean | 336.2 | 6.9 | 8.52 |
SD | 100.6 | 1.9 | 2.55 |
Range | 151.5–696.8 | 3.46–14.58 | 5.45–18.75 |
Excretory | |||
Mean | 135.4 | 2.83 | 3.49 |
SD | 38.7 | 0.73 | 0.79 |
Range | 65.4–254.0 | 1.49–5.32 | 2.29–6.84 |