TABLE 2.

Results of repeated measures ANOVA on time constants τ1, τ2, and peak signal. Comparison of ¹²⁹Xe + ¹⁹F+ (ROI B) and ¹²⁹Xe‐¹⁹F+ (ROI C) showed significant difference for τ2 (P = .0075)

	ROI type (mean ± SD)			Corrected P values (Tukey Kramer) P‐values
	Xe + F19‐ (ROI A)	Xe + F19+ (ROI B)	Xe‐ F19+ (ROI C)	Comparison A‐B	Comparison B‐C	Comparison A‐C
Tau1 (s)	70.46 ± 38.70	36.83 ± 11.56	85.36 ± 56.83	0.3397	0.0589	0.7601
Tau2 (s)	31.16 ± 33.35	18.13 ± 5.52	34.31 ± 11.63	0.4947	0.0075	0.9294
Peak Signal Intensity	9.87 ± 14.55	53.59 ± 17.15	37.01 ± 8.36	<0.0001	0.0192	0.0002

All comparisons of peak values were statistically significant, indicating that the ¹⁹F signal at the end of the dynamic imaging cycle was able to discriminate between the three different types of ROIs.