Table 1.

Lung volume, echo times, average fractional lung water density, average T₂^*, and SNR at TE2 for each scan.

Lung	TE1	TE2	Fractional Lung	Water Density	T2* (msec)		SNR at
Volume	(msec)	(msec)	Coronal	Sagittal	Coronal	Sagittal	TE2
RV	1.0	3.4a	0.28±0.04*	0.28±0.03*	2.02±0.21*	1.72±0.10*	5.9±1.5
RV	1.0	1.8b	0.27±0.03	0.27±0.02	1.95±0.17	1.76±0.17	13.3±3.1
FRC	1.0	2.6a	0.25±0.04#	0.23±0.03#	1.67±0.21#	1.50±0.08	5.9±1.2
FRC	1.0	1.8b	0.25±0.04	0.22±0.02	1.78±0.24	1.57±0.08	10.0±1.7
TLC	1.0	1.8a,b	0.10±0.01+	0.10±0.03+	1.19±0.21+ 1.37±0.08+
3.4±0.9

^aLongest permissible echo time (TE[max]) that was appropriate for imaging at RV, FRC, and TLC.

^bFixed echo time across all lung volumes.

^*Significantly different between RV and FRC, at P < 0.003.

^#Significantly different between FRC and TLC, at P < 0.0001.

⁺Significantly different between RV and TLC, at P < 0.0001.