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Capabilities for correlating image reconstruction, image mapping and threedimensional (3D) visualization, enable the neurosurgeon to simulate surgical procedures into a preoperative protocol to be used during surgery in real -time computer monitor. In this paper use is made of a method, based on reconstruction and processing of serial magnetic Resonance images, as following steps: Segmentation of brain tissue, interpolation of slices and 3 D reconstruction of the
model. Interpolation method and 3 D
reconstruction of cortex surface of the segmented images are analyzed, processed and computing of interpolated slices proceeded by the shapebased interpolation procedures. One of the main parts of the
interpolation process is the estimation of
distance function of the binary cortex images. Morphological operators could reduce the computational time of distance function. Ray tracing and ray casting methods are developed from 3 D reconstruction of cortex surface images. There are some reports that ray casting methods has better ability to detect the
intricate cortex surface. On the other hand, images reconstructed by this method have convenient quality in reconstruction, but needs more time for processing.