Time-Resolved Three-Dimensional Contrast-Enhanced Magnetic Resonance Angiography in Patients with Chronic Expanding and Stable Aortic Dissections

Table 2

Time-intensity curve characteristics of the aortic dissection at the level of the diaphragm.

Lumen	False lumen			True lumen
Group	Expansion	Stable	value	Expansion	Stable	value
TTP [s]	8.4 ± 3.4	13.2 ± 5.5	0.027	8.4 ± 2.7	9.6 ± 3.6	0.44
FWHM [s]	10.8 ± 2.2	24.7 ± 10.2	0.003	10.7 ± 3.8	13.0 ± 6.4	0.40
Upward slope	13.5 ± 6.9	7.6 ± 2.7	0.015	13.4 ± 2.8	11.8 ± 3.5	0.25
Downward slope	−7.0 ± 1.4	−2.0 ± 2.7	0.005	−5.0 ± 3.0	−6.2 ± 3.0	0.66
Delay of peak intensity compared to nondissected aorta [s]	3.0 ± 4.3	10.1 ± 6.4	0.01	1.8 ± 1.5	2.7 ± 4.0	0.66

Significant differences () between the false lumen and the true lumen for the stable group only.