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dc.contributor.authorOzguven, Yildiray
dc.contributor.authorYucel, Birsen
dc.contributor.authorOzyurek, Betul
dc.contributor.authorKarakus, Gulderen
dc.contributor.authorOzguven, Yucel
dc.descriptionWOS: 000317637800008en_US
dc.descriptionPubMed ID: 22475454en_US
dc.description.abstractBackground and purpose: For conformal radiotherapy, it is feasible to achieve high accuracy in contouring the outline of the target volume in treatment planning process. In contouring process, target volume is occasionally defined by means of either surgical clips or skin marker during patient anatomical data acquisition. Treatment planning systems are predicting invalid radiation dose distributions by using surgical clips and skin marker within the patient. Purpose of this study is the production of new skin marker which affects less dose distributions of electron beam. Materials and methods: The influences of lead and commercial markers on dose calculations in a 3D treatment planning systems were investigated in terms of electron beam energy and dose profile depth. Dose deviation with commercial marker was observed to smaller than lead marker. However this dose deviation was still at big value. In order to reduce of this value, barium sulfate suspension and ultrasound gel were mixed with different volumetric ratio. With the purpose of acception the most suitable marker for radiation therapy, obtained new suspensions were investigated in terms of visibility and dose deviation. Results: B:G/1:10 marker was determined to cause optimum visibility and the lowest dose deviation on dose calculations in terms of electron beam energy and dose profile depth. Conclusions: Appropriate marker, mixture of substances such as barium sulfate suspension and ultrasound gel can be produced. This marker is both ease of usage and practical and economical. Each clinic can prepare marker which is peculiar to suspension with different concentration of substance for specific visibility. But, it should be taken into account resultant dose deviation to beam calculation depending on barium sulfate concentration. (C) 2012 Associazione Italiana di Fisica Medica. Published by Elsevier Ltd. All rights reserved.en_US
dc.publisherELSEVIER SCI LTDen_US
dc.subjectSkin markeren_US
dc.subjectElectron beamen_US
dc.subjectDose deviationen_US
dc.subjectBarium sulfateen_US
dc.titleConcentration modulated skin marker for radiotherapy treatment planning processen_US
dc.contributor.department[Ozguven, Yildiray -- Yucel, Birsen -- Ozyurek, Betul] Cumhuriyet Univ, Fac Med, Dept Radiat Oncol, TR-58140 Sivas, Turkey -- [Karakus, Gulderen] Cumhuriyet Univ, Fac Med, CUTFAMRCCUSM, TR-58140 Sivas, Turkey -- [Ozguven, Yucel] Cumhuriyet Univ, Dept Phys, TR-58140 Sivas, Turkeyen_US
dc.contributor.authorIDKARAKUS, Gulderen -- 0000-0003-2596-9208;en_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US

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