Figure 1.

Schematic representation of the proposed concept for identifying and visualising bony impingement (BI) area. (a) POS₁ and (b) POS₂ represent two different postures. (a) ${\text{CAA}}_{{\text{POS}}_1}$ and (b) ${\text{CAA}}_{{\text{POS}}_2}$ are two ‘conical clearance angle’ associated with POS₁ and POS₂ respectively to avoid PI. 1, 2, 3, and 4 represent 25, 50, 75 and 100% of (a) ${\text{CAA}}_{{\text{POS}}_1}$ and (b) ${\text{CAA}}_{{\text{POS}}_2}$ respectively.