“…Computer visualization of vascular structure plays a critical role in the diagnosis of vascular diseases, such as stenosis and aneurysm [12][13][14]. Computational fluids dynamics to study blood flow behaviour has to be based on accurate modelling of local vascular geometries [11,12,[14][15][16]. Computer modelling of vascular bifurcation can be achieved in three ways: 1) skeleton based implicit surfaces [17][18][19], 2) blending objects obtained by canal surfaces [20,21], and 3) sweeping disks or spheres along curve [18,22,23].…”