Computed tomography-guided scalp marking of cerebral surface lesions; an alternative to stereotaxis for small convexity lesions.

Marking of the skull prior to craniotomy on the basis of CT images can prove to be a difficult problem. The method reported here essentially consists of a procedure which involves tilting and manoeuvreing the head within the scanner so that the surface marker is perpendicular to the skull at the site of the lesion. This is easy, useful and not time consuming.