plaque dosimetry
Pronunciation: plak do-SIM-eh-tree
The calculation and measurement of radiation dose distribution from radioactive plaques used in ocular brachytherapy.
Full Definition
Plaque dosimetry involves the precise calculation and verification of radiation dose distribution delivered by radioactive plaques during ocular brachytherapy procedures. This complex process requires consideration of plaque geometry, radioactive source configuration, eye anatomy, and tumor location to ensure adequate tumor dose while minimizing exposure to critical structures like the optic nerve, macula, and lens. Medical physicists use specialized software and measurement techniques to optimize treatment plans and verify dose delivery. Accurate dosimetry is essential for treatment efficacy and for predicting and minimizing radiation-related complications such as retinopathy, neuropathy, and cataract formation.
Usage
Usage note: Often preceded by specific isotope type (e.g., 'iodine-125 plaque dosimetry') in technical documentation.
In Context
- "Plaque dosimetry calculations confirmed adequate tumor coverage with acceptable critical structure doses." — Medical physics report
- "Advanced plaque dosimetry techniques account for tissue heterogeneity and eye movement." — Radiation therapy journal article