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. Author manuscript; available in PMC: 2019 Apr 10.
Published in final edited form as: J Magn Reson Imaging. 2017 Feb 3;46(4):992–1000. doi: 10.1002/jmri.25643

TABLE 4.

Mean UTE Region of Interest (ROI) Image Intensities and CT ROI Densities for Six Radiological Classifications, With Relative Differences of the Means and 95% Confidence Intervals (CI) of the Difference of the Means

Radiological classification Mean UTE ROI image intensity (au; normalized to muscle, uncorrected for T1 and T2*) Mean CT ROI density (g/cm3) Relative difference of means Difference of means [95% CI]
Air trapping 0.31 ± 0.06 0.39 ± 0.10 23% 0.079 [−0.010, 0.168]
Air trapping/cysts 0.33 ± 0.08 0.34 ± 0.10 4% 0.012 [−0.083, 0.108]
Normal 0.50 ± 0.12 0.59 ± 0.11 17% 0.092 [0.055, 0.129]
Mixed cysts with ground glass opacities 0.53 ± 0.09 0.68 ± 0.14 25% 0.153 [−0.037, 0.343]
Ground glass opacities 0.62 ± 0.11 0.72 ± 0.09 15% 0.098 [0.059, 0.137]
Airspace opacities 0.90 ± 0.21 1.11 ± 0.02 21% 0.208 [0.056, 0.359]