MEASUREMENT OF HIGH ENERGY X-RAY BEAM PENUMBRA WITH GAFCHROMIC™ EBT RADIOCHROMIC FILM

摘要

High energy x-ray beam penumbra are measured using Gafchromic™ EBT film. Gafchromic™ EBT, due to its limited energy dependence and high spatial resolution provide a high level of accuracy for dose assessment in penumbral regions. The spatial resolution of film detector systems is normally limited by the scanning resolution of the densitometer.