Abstract: Objective: The purpose of this research is to determine the results of three-dimensional reconstructed skull imaging using the multi slice spiral computed tomography ( MSCT) technique and to assess the normal values of the main canals and foramina in a skull base. Methods: This study used the multi slice spiral computed tomography ( MSCT) technique for brain scans of 200 normal adults(100 male and 100 female). A three-dimensional reconstruction computer software program was implemented to assess the three-dimensional reconstruction of the skull base, which provided a 3-D display of the foramen ovale, foramen spinosum, outside foramen of the carotid canal, foramen lacerum, foramen stylo-mastoideum and the foramen magnum. The program measured functions the average inside diameters of the foramina and also observed foramina shape and sex differences.

Key words: Skull base; MSCT; Three-dimensional reconstruction; Anthropometry; Normal adults