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Benchmark measurements for lung dose corrections for x-ray beams

1988; Elsevier BV; Volume: 15; Issue: 2 Linguagem: Inglês

10.1016/s0360-3016(98)90022-0

1879-355X

R Rice, Ben J. Mijnheer, Lee M. Chin,

Radiation Dose and Imaging

A well defined set of clinically relevant reference measurements for photon dose calculations in the presence of the lung have been provided. These benchmark data were mainly obtained in low-density (ϱ = 0.31 gcm−3) lunglike material as well as in waterlike plastic for 4 and 15 MV X-ray beams. Some additional measurements were performed with materials having a density of 0.015 gcm−3 and 0.18 gcm−3. Phantom geometries included simple layered geometries, finite lung cross section geometries, simulated mediastinum geometries, and simulated tumor in lung geometries. The data are reported as central axis depth doses. A number of parameters were varied, including the field size, the lung geometry, and the distance in and behind the lung.