Three-dimensional reconstruction and analysis
The patient’s CTA images information was obtained from the
hospitalization. CTA data were imported into Materialise’s interactive
medical image control system (MIMICS, version 19.0). MIMICS software was
used to establish a digital three-dimensional model of the patient’s
aorta, distinguish the true and false lumen of the Total aorta (TA) by
color, as well as descending aorta (DA), abdominal aorta (AbA), and
analyzed all models volumes. All volumetric measurements were
automatically measured by the computer.
TA was defined as along the pulmonary vein level at the ascending aorta
to the horizontal bifurcation of the abdominal aorta. DA was defined as
along the pulmonary vein level of the descending aorta to the celiac
artery, and AbA was defined as along the celiac trunk to the horizontal
bifurcation. The study area needed to calculate the volume was manually
drawn in each CT slice. For each model of the aortic segment, calculate
the volume values of the total aortic lumen (TAL), total true lumen
(TTL), total false lumen (TFL), descending aorta aortic lumen (DAAL),
descending aorta true lumen (DATL), descending aorta false lumen (DAFL),
abdominal aorta aortic lumen (AbAL), abdominal aorta true lumen (AbTL),
and abdominal aorta false lumen (AbFL), by the software. All volumes
were expressed in mm3. Thrombus was defined as missing
on the three-dimension reconstruction model.