Fig. 5From: Semi-automatic measurements and description of the geometry of vascular tree based on Bézier spline curves: application to cerebral arteriesFrenet–Serret frame; where: K—spatial curve; P point on the curve; A—plane in which the curve K moves at point P; T—tangent of curve K at point T; N—normal curve K at point P; B—binormal curve K at PBack to article page