Table 5 Second level of analysis for NCICT and Virtual Dose software: comparison with authors’ dose coefficients and between NCICT and NCICTX, for head, chest, and abdomen-pelvis scans (120 kVp). For each body part and gender, we reported the results of the paired Student t test (top) and the range of the relative discrepancies for each class of organs (bottom). In the CT abdomen-pelvis scan, the authors of Virtual Dose software do not report the dose coefficient for the organs considered as outside the scan region.
From: Patient organ and effective dose estimation in CT: comparison of four software applications
|  | NCICT/authors’ dose coefficient | Virtual Dose/authors’ dose coefficient | NCICT/NCICTX | |||
|---|---|---|---|---|---|---|
M | F | M | F | M | F | |
CT head study | 0.117 | 0.109 | 0.343 | 0.089 | 0.047 | 0.219 |
CT chest study | < 0.001 | < 0.001 | 0.027 | 0.239 | 0.012 | < 0.001 |
CT abdomen-pelvis study | 0.054 | 0.015 | 0.089 | 0.002 | 0.127 | 0.018 |
CT head study | ||||||
 Organs inside the scan region | 1–2% | 2–6% | 1% | 3% | 13–25% | 4–13% |
 Partially irradiated organs | 24–40% | 44–72% | 25–29% | 16–22% | 4–33% | 6–180% |
 Distributed organs | 10–12% | 21–30% | 2–14% | 10–13% | 5–19% | 0–21% |
CT chest study | ||||||
 Organs inside the scan region | 2–30% | 2–33% | 3–9% | 3–8% | 3–20% | 6–17% |
 Partially irradiated organs | 19–260% | 43–190% | 0–4% | 1–6% | 20–75% | 0–32% |
 Organs outside the scan region | 21–230% | 80–200% | 0–16% | 4–19% | 0–82% | 1–100% |
 Distributed organs | 22–27% | 32–34% | 5–7% | 4–5% | 4–6% | 1–5% |
CT abdomen-pelvis study | ||||||
 Organs inside the scan region | 0–400% | 0–62% | 0–640% | 0–22% | 0–24% | 0–17% |
 Partially irradiated organs | 0% | 0% | 57–110% | 47–83% | 7–28% | 10–200% |
 Organs outside the scan region | 0-3% | 2% | - | - | 9–11% | 19–36% |
 Distributed organs | 19–52% | 12–18% | 19–33% | 1–18% | 14% | 1–10% |