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Directional dependence in film dosimetry: radiographic and radiochromic film

2001; IOP Publishing; Volume: 46; Issue: 5 Linguagem: Inglês

10.1088/0031-9155/46/5/305

1361-6560

Natalka Suchowerska, Peter Hoban, Martin J Butson, Alastair Davison, Peter Metcalfe,

Radiation Effects and Dosimetry

The trend towards conformal, intensity modulated radiotherapy treatments has established the need for a true integrating dosimeter. In traditional radiotherapy, radiographic film dosimetry is commonly used. The accuracy and reproducibility of film optical density as an indicator of dose is influenced by several variables, including the chemical processing conditions. As a result radiochromic film, with all the advantages of radiographic film but without the need for chemical processing, has increased in popularity, although the low-dose sensitivity of radiochromic film does remain a disadvantage for some experiments. Several studies have investigated the reproducibility of radiochromic film results, but none have specifically addressed the well-known directional dependence seen with traditional radiographic film.