There is provided a support adapted for location exteriorly of a blood vessel, the support being locatable around the blood vessel and shaped to be in morphological relationship with the blood vessel, in which the support is formed from a settable material and the support is capable of being formed into a tube； and a method of morphometric analysis of a patient's blood vessel using an imaging scanner which method has the steps of: (i) obtaining a diametral cross-sectional image of the blood vessel； (ii) obtaining a pseudo-transverse cross-section image of the blood vessel； and (iii) processing the images from steps (i) and (ii) to construct a morphometric model of the blood vessel.
