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) |
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Pages (from-to) | 3774 |
Number of pages | 1 |
Journal | Medical physics |
Volume | 39 |
Issue number | 6 |
DOIs | |
State | Published - Jun 2012 |
ASJC Scopus subject areas
- Biophysics
- Radiology Nuclear Medicine and imaging