Figure 2
From: Robust Segmentation of the Full Cerebral Vasculature in 4D CT of Suspected Stroke Patients
Examples of difficulties encountered in vessel segmentation. From left to right: Skull base region, arteries and veins surrounded by hyperdens bony structures in their course through the skull base, which renders difficulties in separating them from each other; patient with coils placed at the anterior communicating artery; patient with ventricular shunt causing a linear artifact in the left cerebral hemisphere.
