Measured (blue solid line) light fluence data over the course of treatment along with calculated (red ‘x’) light fluence using the direct component 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).