J Med Phys Close
 

Figure 1: The geometry of the phantom: Coronal (a) and sagittal (b) views. Two 30 cm × 30 cm phantom sets are stacked together. Source-to-surface distance was 95 cm, and the chamber was placed at a depth of 5 cm. 10-cm phantom was kept below the measurement point for providing sufficient backscatter. 10 cm × 10 cm was taken as a reference field. A monitor unit of 100 MU was given as a reference MU

Figure 1: The geometry of the phantom: Coronal (a) and sagittal (b) views. Two 30 cm × 30 cm phantom sets are stacked together. Source-to-surface distance was 95 cm, and the chamber was placed at a depth of 5 cm. 10-cm phantom was kept below the measurement point for providing sufficient backscatter. 10 cm × 10 cm was taken as a reference field. A monitor unit of 100 MU was given as a reference MU