Fig. 1

54-year-old male patient with spinal malperfusion syndrome due to acute Stanford type B aortic dissection. a Color-coded image gained from DSA prior to fenestration with ROI placement in the true lumen at the level of the infrarenal abdominal aorta. Compromised blood flow in the true lumen is represented by cold color gradients and corresponding flow curves (right corner). b After creation of two fenestration windows, the color-coded summation image demonstrates warmer color gradients at the measuring points and shortened TTP values. The arrow marks one of the fenestration windows just below the level of the renal artery