PMID: 9434987Jan 22, 1998Paper

The determination of dose characteristics of ruthenium ophthalmic applicators using radiochromic film

Medical Physics
G TacciniA Pilot

Abstract

Ruthenium ophthalmic applicators are energetic beta ray sources, supplied in several shapes and dimensions, and used in intraocular tumor therapy. Because of their small dimensions, the determination of dosimetric characteristics represents a technical challenge. We developed a semiautomatic method to define surface dose, dose distribution, and percentage depth dose of such applicators using radiochromic dosimetric media. These detectors consist of a thin (7 microns) radiation sensitive layer on polyester base (100 microns total thickness) changing color as a function of radiation exposure. Transmission images of exposed films were then grabbed with a TV-digitizer system to obtain a gray-level image from which dosimetric characteristics such as isodose distribution, dose values, and homogeneity of nuclide distribution were derived. Good agreement between experimental results and Monte Carlo simulation performed using the GEANT 3 code, appear to be a confirmation of the validity of the method. Moreover while manufacturer specifications of absolute and relative dose rates present a standard deviation error of +/- 30% on dose rate and +/- 6% on accuracy of relative dose values, the proposed method reduces the errors to +/- 10% and...Continue Reading

References

Jan 1, 1992·Ophthalmologica. Journal international d'ophtalmologie. International journal of ophthalmology. Zeitschrift für Augenheilkunde·R MenapaceA Chiari
May 1, 1991·Medical Physics·J A Sayeg, R C Gregory
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Jul 1, 1989·Medical Physics·S K JaniB M Knosp
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Oct 1, 1993·Radiotherapy and Oncology : Journal of the European Society for Therapeutic Radiology and Oncology·R E Tjho-HeslingaJ W Leer

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Citations

Mar 8, 2013·Applied Radiation and Isotopes : Including Data, Instrumentation and Methods for Use in Agriculture, Industry and Medicine·M C FussG García
Jul 20, 2014·Applied Radiation and Isotopes : Including Data, Instrumentation and Methods for Use in Agriculture, Industry and Medicine·Sou-Tung Chiu-TsaoMark J Rivard
Nov 20, 2012·Strahlentherapie und Onkologie : Organ der Deutschen Röntgengesellschaft ... [et al]·L BruallaW Sauerwein
May 6, 2011·Applied Radiation and Isotopes : Including Data, Instrumentation and Methods for Use in Agriculture, Industry and Medicine·M C FussG García
Apr 11, 2006·Radiation Protection Dosimetry·F MourtadaW Newhauser
Dec 10, 1999·Physics in Medicine and Biology·I DaftariL J Verhey
Feb 6, 2018·Medical Physics·Marcelino Hermida-López, Lorenzo Brualla

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