Intra-operative determination of dimensions for fabrication of artificial bone flap

A method for calculating, in a processor, dimensions for fabricating an artificial bone flap, the method comprising:

• obtaining, using a portable three-dimensional (3D) scanner, intra-operative data indicating dimensions of an opening in a portion of the patient's skull, the intra-operative data including a 3D surface scan of the portion of the patient's skull including the opening and including a first plurality of reference points located on or near the patient;
• obtaining a 3D reference image of at least the portion of the patient's skull without the opening, the 3D reference image including a second plurality of reference points that at least partly overlap with the first plurality of reference points;
• calculating 3D dimensions of the opening using the intra-operative data, the intra-operative data being registered to the reference image on the basis of the overlapping reference points;
• and
• storing, in a memory in communication with the processor, the calculated 3D dimensions for fabricating the artificial bone flap by a fabrication system.