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. Author manuscript; available in PMC: 2016 Jul 1.
Published in final edited form as: J Comput Assist Tomogr. 2015 Jul-Aug;39(4):584–590. doi: 10.1097/RCT.0000000000000238

Table 4.

Human CT Airway Measurements at Different Fields of View

Field of View
Airway Metric 30 cm 15 cm 10 cm ANOVA
p-value1 		10 cm vs. 30
cm p-value2 		15 cm vs. 30
cm
p-value2 		10 cm vs. 15
cm
p-value2
WT (mm) 1.319 ± 0.132 1.293 ± 0.142 1.285 ± 0.143 <0.0001 <0.0001 <0.0001 0.01
WA (mm2) 18.587 ± 4.154 18.375 ± 4.246 18.249 ± 4.249 <0.0001 <0.0001 0.0001 0.03
WA%3 72.679 ± 3.624 71.799 ± 3.647 71.584 ± 3.663 <0.0001 <0.0001 <0.0001 0.04
Pi10 (mm) 4.368 ± 0.271 4.310 ± 0.290 4.292 ± 0.290 <0.0001 <0.0001 <0.0001 0.03
ID (mm) 2.891 ± 0.500 2.956 ± 0.493 2.966 ± 0.495 <0.0001 <0.0001 <0.0001 0.22
1

Overall test of 10 cm FOV vs. 15 cm FOV vs. 30 cm FOV

2

Pairwise comparison using Tukey’s correction

3

WA% is dimensionless and calculated as follows: WA/total area (TA) × 100