Design and implementation of a "cheese" phantom-based Tomotherapy TLD dose intercomparison.

Background: The unique beam-delivery technique of Tomotherapy machines (Accuray Inc., Sunnyvale, Calif.) necessitates tailored quality assurance.

Surface dose characterisation of the Varian Ir-192 HDR conical surface applicator set with a vertically orientated source.

Background: Conical surface applicators with an Ir-192 high-dose-rate brachytherapy source are a common modality for the treatment of non-melanomatous skin cancer with high tumour control rates. Surface dose characterisation of the Varian Varisource GammaMed+ IX afterloader vertical type surface applicators is performed two dimensionally using high-resolution film dosimetry.

Aim: The focus of this study was to determine if Varian surface applicators with a vertical source suffer from the dose distribution irregularities reported for comparable applicators.

GAFCHROMIC EBT photospectral dose response dependence on temperature and implications for flat bed scanning.

Purpose: Various forms of GAFCHROMIC film have been used for several years as radiographic media for measuring dose distributions. GAFCHROMIC EBT (GC-EBT) film is particularly useful for clinical dose ranges. This thin film dosimeter develops a blue color (lambdamax approximately 635 nm) when irradiated with ionizing radiation.