The Acuros XB advanced dose calculation (Acuros XB) algorithm was developed to address two strategic needs of external photon beam treatment planning: accuracy and speed. In external photon beam radiotherapy, heterogeneities introduced by materials such as lung, bone, air and non-biologic implants may significantly affect patient dose fields, especially in the presence of small or irregular fields. Acuros XB uses a sophisticated technique to solve the Linear Boltzmann transport equation and directly accounts for the effects of these heterogeneities in patient dose calculations…

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