Fig. 2From: Retrosigmoid approach assisted by high-resolution computed tomography: a cost-effective technique to identify the transverse and sigmoid sinus transitionSlice A. This figure shows slice A, which displays the root of the zygoma and the inion simultaneously, the locations of point α and point β are displayed, and the line that connects them is perpendicular to the skull. The distance between point β and the lambdoid suture/occipitomastoid suture on the outer surface of the skull should be measuredBack to article page