Clinical prototype of a plastic water-equivalent scintillating fiber dosimeter array for QA applicationsa)

Abstract

A clinical prototype of a scintillating fiber dosimeter array for quality assurance applications is presented. The array consists of a linear array of 29 plastic scintillation detectors embedded in a water-equivalent plastic sheet coupled to optical fibers used to guide optical photons to a charge coupled device (CCD) camera. The CCD is packaged in a light-tight, radiation-shielded housing designed for convenient transport. A custom designed connector is used to ensure reproducible mechanical positioning of the optical fibers relative to the CCD. Profile and depth dose characterization measurements are presented and show that the prototype provides excellent dose measurement reproducibility (+/-0.8%) in-field and good accuracy (+/-1.6% maximum deviation) relative to the dose measured with an IC10 ionization chamber.

Dosimetric performance and array assessment of plastic scintillation detectors for stereotactic radiosurgery quality assurance

“…The PSD used in this study is composed of a 1 mm diameter by 1.0 (60.1) mm long polystyrene scintillating fiber (BCF-60, Saint-Gobain Crystals, Paris, France) for a total sensitive volume of 7.8 Â 10 À4 cm 3 , coupled with a polymethylmethacrylate Eska premier optical fiber 16 (Mitsubishi, Rayon Co., Ltd., Tokyo, Japan). Each single PSD is coated by a polyethylene jacket to increase the toughness of the detector.…”

Dose mapping of the rectal wall during brachytherapy with an array of scintillation dosimeters

“…16,17 These consisted of 10 and 29 scintillation detectors arranged in a line. For external beam applications, the removal of the large Cerenkov background signal is essential.…”

Preliminary evaluation of the dosimetric accuracy of thein vivoplastic scintillation detector OARtrac system for prostate cancer treatments

“…Scintillator detectors are also nearly water equivalent, unlike MOSFETs (metal oxide semiconductor field effect transistors) and diode detectors. Additionally, scintillator detectors are well known for their dose linearity and high spatial resolution (Beddar et al , 1992b, a; Fontbonne et al , 2002; Archambault et al , 2005; Beddar, 2006; Archambault et al , 2006; Lambert et al , 2007; Archambault et al , 2007; Lacroix et al , 2008)…”