Fig. 2. Three-dimensional (3D) co-ordinates of the sella and nasion in a PACS as the reference line for angular measurement. The 3D co-ordinates of the sella (A) and nasion (B) on axial images were measured using a pixel lens cursor in a PACS report viewer. Each point was verified on reconstructed coronal (C and D) and sagittal images in the PACS report viewer. PACS, picture archiving and communication system.
