Quantitative digital subtraction angiography during type B chronic aortic dissection endovascular repair

Angiographic assessment of type B chronic aortic dissection can be complicated in thoracic endovascular aortic repair (TEVAR) procedures due to a complex flow pattern. The challenge in identifying the true and false lumen and the precise deployment of the endograft in the true lumen are hotspots in endovascular treatment dissections. Parametric color coding (PCC) is a recent tool for measuring flow dynamics in a digital subtraction angiography (DSA) series that provides quantitative information. In a single image, the quantitative DSA (Q-DSA; Syngo iFlow software; Siemens, Forchheim, Germany) displays objective information on the contrast medium through vessels. We describe the potential utility of Q-DSA in the endovascular treatment of a 76-year-old man who presented with a thoracic false lumen aneurysm measuring 6.2 cm accompanied by a large proximal entry tear.