What is small field dosimetry?
A concise answer based on the original USMP small field dosimetry article.
Small field dosimetry is the measurement and review of radiation fields that are small enough for detector size, source occlusion, and loss of lateral charged particle equilibrium to meaningfully affect dose measurement. These conditions are common concerns in advanced radiotherapy techniques that use small segments or narrow fields.
The original USMP article notes that techniques such as IMRT, VMAT, stereotactic radiotherapy, stereotactic radiosurgery, and stereotactic body radiotherapy can involve small or highly shaped fields. That makes detector choice, measurement method, and peer review especially important.
This page is educational and should not be treated as a substitute for a clinic-specific physics review, commissioning protocol, or approved clinical procedure.