Dosimetric evaluation of the gantry sag effect in clinical SRS plans.

Objectives: The gantry sag introduces a largely reproducible variation of the radiation field center around the radiation isocenter. The purpose of this work is to assess the change of the dose distribution caused by the gantry sag in clinical stereotactic plans.

Methods: Brain stereotactic radio surgery treatment plans were evaluated and grouped according to radiation therapy planning technique.

Validation of total skin electron irradiation (TSEI) technique dosimetry data by Monte Carlo simulation.

Total skin electron irradiation (TSEI) is a complex technique which requires many nonstandard measurements and dosimetric procedures. The purpose of this work was to validate measured dosimetry data by Monte Carlo (MC) simulations using EGSnrc-based codes (BEAMnrc and DOSXYZnrc). Our MC simulations consisted of two major steps.

Postmastectomy electron-beam chest-wall irradiation in women with breast cancer.

Purpose: This retrospective study evaluates the results of postmastectomy electron-beam chest-wall irradiation in patients with breast cancer.

Methods And Materials: From 1980 to 1994, 144 women with localized breast cancer received postmastectomy radiotherapy. The chest wall was irradiated by electron beam, 6 to 12 MeV energy, depending on wall thickness, 2.