Abstract
A new scalp extraction method for Magnetic Resonance Imaging(MRI) brain images in 3D was proposed for the requirements of image guided surgery on fast and accurate positioning in craniotomy.Firstly,anisotropic diffusion filtering was used to reduce noises,and the brain parenchyma image was got by the medical software of BrainSuite3.Afterwards,the brain parenchyma was removed and the threshold of scalp from non-brain-image was calculated.Thirdly,outside surface was extracted by mathematical morphology.Finally,combined with the gray value of scalp,the scalp was reconstructed by Marching Cube(MC) algorithm.The experiments show that this method can extract scalp effectively and the precision reaches sub-pixel's level by connecting threshold,mathematical morphology and MC algorithm.
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