Measured (blue solid line) light fluence data over the course of treatment along with calculated (red ‘x’) light fluence using the direct component with fixed scattered light and the dual correction method plotted for 7 detector locations (Case No. 013): (a) anterior chest wall (ACW), (b) apex, (c) anterior sulcus (AS), (d) posterior chest wall (PCW), (e) pericardium (Peri), (f) posterior mediastinum (PM), and (g) posterior sulcus (PS).