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 journalArticlepeer-review

1 Scopus citations


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 languageEnglish (US)
Pages (from-to)3774
Number of pages1
JournalMedical physics
Issue number6
StatePublished - Jun 2012
Externally publishedYes

ASJC Scopus subject areas

  • Biophysics
  • Radiology Nuclear Medicine and imaging


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