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.