fig1

Figure 1. Modelling soft tissue volume in the temporal region. (A) Key anatomical landmarks are identified on the CT scan aided by 3D reconstruction of the scan. Tissue thicknesses are measured in reference to these points. (B) These are then laid out as coordinates across a template. The coordinates are used to generate linear equations that predict tissue thickness along different planes across the length (T1,2,6,7) and height (T3,4,5) of the soft tissue construct. These equations are as following. Temporal fat: T1 = 0.55l; T2 = 1.44l; T3 = -0.21h + 9.37; T4 = -0.22h + 9.20; T5 = -0.16h + 7.53; T6 = -0.061l + 9.61; T7 = -0.0086l + 4.18. Temporalis muscle: T1 = 0.028l; T2 = 0.92l; T3= -0.15h + 14.6; T4 = -0.12h + 10.2; T5 = -0.008h + 4.2; T6 = -0.35 + 14.9; T7 = -0.26l + 11.08. "h" is height along orbital rim and "h" is length across the zygomatic arch in reference to the Jugale point. The latter divides the model into two lengths, L1 anteriorly and L2 posteriorly.