SU‐E‐T‐308: Dosimetry of a New Minimally Invasive Episcleral Brachytherapy Device

R. Hamilton; T. Cetas; J. Gordon; W. Lutz; L. Marsteller

doi:10.1118/1.4735394

SU‐E‐T‐308: Dosimetry of a New Minimally Invasive Episcleral Brachytherapy Device

R. Hamilton, T. Cetas, J. Gordon, W. Lutz, L. Marsteller

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

Purpose: Describe the dosimetry of an episcleral brachytherapy device. Methods: The SMD‐I device is designed to treat exudative age‐related macular degeneration (AMD) and employs a Sr‐90/Y‐90 source encapsulated in a stainless steel cylinder. The source is welded to a flexible wire allowing it to travel from a shielded vault in the SMD‐I handle to the distal end of a curved cannula to deliver a therapeutic dose of radiation through the sclera to the neovascular target in the subchoroidal space. The SMD‐I handle and vault are comprised of Ultem, a lightweight radiation tolerant plastic, which shields the surgeon. Dose calculations were performed using the MCNPX radiation transport code. The absolute dose rate was determined using radiochromic film (GAFChromatic

Original language	English (US)
Pages (from-to)	3774
Number of pages	1
Journal	Medical physics
Volume	39
Issue number	6
DOIs	https://doi.org/10.1118/1.4735394
State	Published - Jun 2012
Externally published	Yes

ASJC Scopus subject areas

Biophysics
Radiology Nuclear Medicine and imaging

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abstract = "Purpose: Describe the dosimetry of an episcleral brachytherapy device. Methods: The SMD‐I device is designed to treat exudative age‐related macular degeneration (AMD) and employs a Sr‐90/Y‐90 source encapsulated in a stainless steel cylinder. The source is welded to a flexible wire allowing it to travel from a shielded vault in the SMD‐I handle to the distal end of a curved cannula to deliver a therapeutic dose of radiation through the sclera to the neovascular target in the subchoroidal space. The SMD‐I handle and vault are comprised of Ultem, a lightweight radiation tolerant plastic, which shields the surgeon. Dose calculations were performed using the MCNPX radiation transport code. The absolute dose rate was determined using radiochromic film (GAFChromatic",

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SU‐E‐T‐308: Dosimetry of a New Minimally Invasive Episcleral Brachytherapy Device

Abstract

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