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Table 2 Prospective validation in pigs

From: Ultra-low-dose sequential computed tomography for quantitative lung aeration assessment—a translational study

Parameter

Spiral, 180 mAs

Sequential, 20 mm feed, 180 mAs

Sequential LD, 20 mm feed, 50 mAs

 

p

 

p

CTDI (mGy)

4.4 (4.1–4.9)

0.46 (0.41–0.51)

0.029

0.18 (0.15–0.18)

<0.001

DLP (mGy·cm)

113.7 (103.2–138.6)

10.2 (9.5–12.6)

0.029

4.0 (3.4–4.7)

<0.001

E (mSv)

2.3 (2.1–2.8)

0.21 (0.19–0.26)

0.029

0.09 (0.07–0.10)

<0.001

Scan acquisition time (s)

6.8 (6.3–7.0)

22.7 (21.4–25.4)

0.004

24.1 (22.3–26.3)

<0.001

Number of slices

244 (227–252)

12 (11–13)

<0.001

12 (11–13)

0.001

  1. Dosimetry, scan execution time and number of acquired slices in the three scan protocols in pigs. P values refer to the paired comparison with the reference spiral scan. CTDI computed tomography dose index, DLP dose length product, E effective dose. Data are median and (interquartile range)