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PHSOR02 Presentation Time: 12:35 PM by Surendra Prajapati; Samantha J. Simiele; Rajat Kudchadker; Firas Mourtada is a Medicine article available to read on EtoBox.

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Purpose To develop a practical and efficient method for the dosimetric verification of Ru-106 plaques using radiochromic film measurements. Materials and Methods A hemispherical Solid WaterTM phantom with two quadrants was constructed with 12 mm radius to fit with eye plaque models - CCA, CCB, CCD and COB (Eckert & Ziegler BEBIG GmbH, Berlin, Germany). Each Ru-106 plaque was placed on the convex surface of the phantom for the film irradiations. Two types of radiochromic GafchromicTM dosimetry films (Ashland Advanced Materials, Bridgewater, NJ, USA) were studied - HD-V2 film with 12 μm active layer on a 97 μm clear polyester substrate and EBT-XD film with 25 μm active layer sandwiched between two 125 μm thick clear polyester substrates. A hemispherical film cut was sandwiched between the two quadrants of the phantom. Irradiation time for each plaque was calculated based on the dose rate from the vendor source certificate per AAPM TG 221 protocol. For each plaque, at least three irradiations were completed with each film type. AAPM TG 55 recommendations were used for film handling and scanning. Film dose measurements were analyzed at clinically relevant depth of 2 mm - 5 mm. For each

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Author

Surendra Prajapati; Samantha J. Simiele; Rajat Kudchadker; Firas Mourtada

Publisher

Elsevier BV

Published

2022

Language

EN

Field

Medicine (Health Sciences)