Brain surgery has high risk and difficult features. Determine the entrance and path of thecraniotomy is first step in the surgical operation, which related to the success of surgerydirectly. The assisted surgical navigation devices are widely used by doctors to sketch thecraniotomy outline currently, planning surgical path, whereby guiding the surgery. Thesurgical navigation systems requires to visualize the brain structures from three-dimensionalperspective, including scalp, skull, brain parenchyma and tum...