Monte Carlo‐based beam quality and phantom scatter corrections for solid‐state detectors in [Formula: see text] and [Formula: see text] brachytherapy dosimetry

Beam quality correction, [Formula: see text] , for solid‐state detectors diamond, LiF, [Formula: see text] , and plastic scintillator are calculated as a function of distance, r, along the transverse axis of the [Formula: see text] and [Formula: see text] brachytherapy sources using the Monte Carlo‐based EGSnrc code system. This study also includes calculation of detector‐specific phantom scatter correction, [Formula: see text] , for solid phantoms such as PMMA, polystyrene, solid water, virtual water, plastic water, RW1, RW3, A150, and WE210. For [Formula: see text] source, [Formula: see text] is about unity and distance‐independent for diamond, plastic scintillator, [Formula: see text] and LiF detectors. For this source, [Formula: see text] decreases gradually with r for [Formula: see text] detector (about 6% smaller than unity at 15 cm). For [Formula: see text] source, [Formula: see text] is about unity and distance‐independent for [Formula: see text] detector (overall variation is about 1% in the distance range of 1–15 cm). For this source, [Formula: see text] increases with r for diamond and plastic scintillator (about 6% and 8% larger than unity at 15 cm, respectively). Whereas [Formula: see text] decreases with r gradually for LiF (about 4% smaller than unity at 15 cm) and steeply for [Formula: see text] (about 25% smaller than unity at 15 cm). For [Formula: see text] source, solid water, virtual water, RW1, RW3, and WE210 phantoms are water‐equivalent for all the investigated solid‐state detectors. Whereas polystyrene and plastic water phantoms are water‐equivalent for diamond, plastic scintillator, [Formula: see text] and LiF detectors, but show distance‐dependent [Formula: see text] values for [Formula: see text] detector. PMMA phantom is water‐equivalent at all distances for [Formula: see text] detector, but shows distance‐dependent [Formula: see text] values for remaining detectors. A150 phantom shows distance‐dependent [Formula: see text] values for all the investigated detector materials. For [Formula: see text] source, solid water, virtual water, RW3, and WE210 phantoms are water‐equivalent for diamond, plastic scintillator, [Formula: see text] and LiF detectors, but show distance‐dependent [Formula: see text] values for [Formula: see text] detector. All other phantoms show distance‐dependent [Formula: see text] values for all the detector materials. PACS numbers: 87.10.Rt, 87.53.Bn, 87.53.Jw