نتایج جستجو برای: gafchromic xrct

تعداد نتایج: 399  

Journal: :Medical physics 2009
Slobodan Devic Nada Tomic Christopher G Soares Ervin B Podgorsak

The authors present a radiochromic film dosimetry protocol for a multicolor channel radiochromic film dosimetry system consisting of the external beam therapy (EBT) model GAFCHROMIC film and the Epson Expression 1680 flat-bed document scanner. Instead of extracting only the red color channel, the authors are using all three color channels in the absorption spectrum of the EBT film to extend the...

2005
George Thomas Yushan Li Robert Y.L. Chu John Y. Cheung Feroz Maqbool Frank Rabe G. Scott Burns

Many of the newer X-ray machines are equipped with electronic means to provide dose-area product (DAP) information. For machines without that ability, an alternative method is to record radiation on a film that can handle a large amount of cumulative exposure. The use of GafChromic XR Type R film was investigated for this purpose by placing it at the X-ray tube assembly to record the radiation ...

Journal: :Physics in medicine and biology 2005
Martin J Butson Tsang Cheung Peter K N Yu

FWT-60 radiochromic film has been tested for colouration effects from fluorescent light sources and shown to produce a marked colouration when exposed to office fluorescent light sources showing an approximate 1 OD unit per 0.5 J m(-2) exposure to a broad ultraviolet (UV) UVA + UVB spectrum at the peak absorption wavelength. This produces a measurable and quantifiable response to UV exposure. B...

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