  Purpose: To update and extend the Carleton Laboratory for Radiotherapy
Physics (CLRP) Eye Plaque (EP) dosimetry database for low-energy
photon-emitting brachytherapy sources using egs_brachy, an open-source EGSnrc
application. The previous database, CLRP_EPv1, contained datasets for the
Collaborative Ocular Melanoma Study (COMS) plaques (2008). The new database,
CLRP EPv2, consists of newly-calculated 3D dose distributions for 17 plaques [8
COMS, 5 Eckert & Ziegler BEBIG, and 4 other representative models] for Pd-103,
I-125, and Cs-131 seeds.
  Methods: Plaque models are developed with egs_brachy, based on
published/manufacturer dimensions and material data. The BEBIG plaques are
identical in dimensions to COMS plaques but differ in elemental composition
and/or density. Eye plaques and seeds are simulated at the centre of
full-scatter water phantoms, scoring in (0.05 cm)^3 voxels spanning the eye for
scenarios: (i) HOMO: simulated TG43 conditions; (ii) HETERO: eye plaques and
seeds fully modelled; (iii) HETsi (BEBIG only): one seed is active at a time
with other seed geometries present but not emitting photons (inactive). For
validation, doses are compared to those from CLRP_EPv1 and published data.
  Data Format and Access: Data are available at https://physics.carleton.ca/
clrp/eye_plaque_v2, http://doi.org/10.22215/clrp/EPv2. The data consist of 3D
dose distributions (text-based EGSnrc 3ddose file) and graphical presentations
of the comparisons to previously published data.
  Potential Applications: The CLRP EPv2 database provides accurate reference 3D
dose distributions to advance ocular brachytherapy dose evaluations. The
fully-benchmarked eye plaque models will be freely-distributed with egs brachy,
supporting adoption of model-based dose evaluations as recommended by TG-129,
TG-186, and TG-221.
