PURPOSE: Modern dosimetry data are not available for Collaborative Ocular Melanoma Study-based eye plaques. This report aims to provide these data for eye plaques ranging from 10 to 22 mm, and for three different low-energy, photon-emitting radionuclides. METHODS AND MATERIALS: Recent publications on brachytherapy dosimetry parameters for 103Pd, 125I, and 131Cs were evaluated for use as eye plaque reference data. These data were entered into the Pinnacle treatment planning system for 3D calculations of brachytherapy dose distributions along the central axis for depths ranging from -1 to 10 mm based on the origin positioned at the inner sclera. In accordance with the original Collaborative Ocular Melanoma Study protocol and in the absence of radionuclide-specific heterogeneity factors, inhomogeneity corrections were not applied. RESULTS: As expected due to the mean photon energies, 103Pd, 125I, and 131Cs provided increasingly penetrating dose distributions. Dose distribution tables were prepared for fully loaded plaques and for plaques with the central source(s) removed. Over the entire range of central axis depths, and for all plaque sizes and loadings, 131Cs produced minimal outer scleral doses. Similarly, 103Pd generally produced more favorable dose distributions than 125I for depths less than 4mm. CONCLUSIONS: A modern analysis of eye plaque dosimetry evaluated dose as a function of lesion height and applicator size, and showed dependence on radionuclide selection and implant duration. For a fixed dose at the prescription point, we observed higher scleral dose corresponded with lower photon energy for a variety of plaque sizes and lesion heights.
PURPOSE: Modern dosimetry data are not available for Collaborative Ocular Melanoma Study-based eye plaques. This report aims to provide these data for eye plaques ranging from 10 to 22 mm, and for three different low-energy, photon-emitting radionuclides. METHODS AND MATERIALS: Recent publications on brachytherapy dosimetry parameters for 103Pd, 125I, and 131Cs were evaluated for use as eye plaque reference data. These data were entered into the Pinnacle treatment planning system for 3D calculations of brachytherapy dose distributions along the central axis for depths ranging from -1 to 10 mm based on the origin positioned at the inner sclera. In accordance with the original Collaborative Ocular Melanoma Study protocol and in the absence of radionuclide-specific heterogeneity factors, inhomogeneity corrections were not applied. RESULTS: As expected due to the mean photon energies, 103Pd, 125I, and 131Cs provided increasingly penetrating dose distributions. Dose distribution tables were prepared for fully loaded plaques and for plaques with the central source(s) removed. Over the entire range of central axis depths, and for all plaque sizes and loadings, 131Cs produced minimal outer scleral doses. Similarly, 103Pd generally produced more favorable dose distributions than 125I for depths less than 4mm. CONCLUSIONS: A modern analysis of eye plaque dosimetry evaluated dose as a function of lesion height and applicator size, and showed dependence on radionuclide selection and implant duration. For a fixed dose at the prescription point, we observed higher scleral dose corresponded with lower photon energy for a variety of plaque sizes and lesion heights.
Authors: Mark J Rivard; Sou-Tung Chiu-Tsao; Paul T Finger; Ali S Meigooni; Christopher S Melhus; Firas Mourtada; Mary E Napolitano; D W O Rogers; Rowan M Thomson; Ravinder Nath Journal: Med Phys Date: 2011-01 Impact factor: 4.071
Authors: Hui Li; Piotr G Rychahou; Zheng Cui; Fengmei Pi; B Mark Evers; Dan Shu; Peixuan Guo; Wei Luo Journal: Nucleic Acid Ther Date: 2015-05-27 Impact factor: 5.486
Authors: Christina Binder; Prithvi Mruthyunjaya; Amy C Schefler; Michael I Seider; Richard Crilly; Arthur Hung; Sheridan Meltsner; Yvonne Mowery; David G Kirsch; Bin S Teh; Richard L S Jennelle; Matthew T Studenski; Wu Liu; Choonik Lee; James A Hayman; Brian Kastner; Michael Hadsell; Alison H Skalet Journal: Ocul Oncol Pathol Date: 2019-12-11
Authors: David Miguel; Jesús María de Frutos; Francisco López-Lara; Pilar Alonso; Patricia Diezhandino; María Antonia Saornil; Ciro García Journal: J Contemp Brachytherapy Date: 2019-06-28