J Med Phys Close
 

Figure 2: The postal phantom is a 4 × 4 × 20 cm3 lucite phantom consisting of two pieces to allow placement of our GafChromic® EBT3 film at 8.9 cm depth

Figure 2: The postal phantom is a 4 × 4 × 20 cm3 lucite phantom consisting of two pieces to allow placement of our GafChromic® EBT3 film at 8.9 cm depth