PURPOSE The purpose of the present study was to investigate the ability of commercial patient quality assurance (QA) systems to detect linear accelerator-related errors. METHODS Four measuring systems (Delta(4®), OCTAVIUS(®), COMPASS, and Epiqa™) designed for patient specific quality assurance for rotational radiation therapy were compared by measuring four clinical rotational intensity modul...

1. Rossi R, Mori M, Lotti T. Actinic keratosis. Int J Dermatol. 2007;46:895--904. 2. Schaefer I, Augustin M, Spehr C, Reusch M, Kornek T. Prevalence and risk factors of actinic keratoses in Germany----analysis of multisource data. J Eur Acad Dermatol Venereol. 2014;28:309--13. 3. Naldi L, Chatenoud L, Piccitto R, Colombo P, Placchesi EB, La Vecchia C, et al. Prevalence of actinic keratoses and ...

1. Rossi R, Mori M, Lotti T. Actinic keratosis. Int J Dermatol. 2007;46:895--904. 2. Schaefer I, Augustin M, Spehr C, Reusch M, Kornek T. Prevalence and risk factors of actinic keratoses in Germany----analysis of multisource data. J Eur Acad Dermatol Venereol. 2014;28:309--13. 3. Naldi L, Chatenoud L, Piccitto R, Colombo P, Placchesi EB, La Vecchia C, et al. Prevalence of actinic keratoses and ...

PURPOSE To verify the accuracy of volumetric arc therapy (VMAT) using the RapidArc™ device when switching patients from one single linear accelerator (linac) to a paired energy and mechanics "twin" linac without reoptimization of the original treatment plan. PATIENTS AND METHODS Four centers using 8 linacs were involved in this study. Seventy-four patients previously treated with the 6MV phot...

Purpose: To validate a locally fabricated phantom of Imatrixx-2D Array by comparing its results with ArcCheck phantom and comparing portal dosimetry measurements with the two phantom studies. Materials and Methods: Electronic Portal Imaging Devices and Epiqa software were used for portal dosimetry. An Imatrixx-2D array with a locally fabricated phantom and ArcCheck cylindrical phantom were used...