Comparison between Acuros XB and Brainlab Monte Carlo algorithms for photon dose calculation

作     者：Misslbeck, M. Kneschaurek, P. 

作者机构：Tech Univ Munich Klinikum Rechts Isar Klin & Poliklin Strahlentherapie & Radiol Onkol D-81675 Munich Germany 

出 版 物：《STRAHLENTHERAPIE UND ONKOLOGIE》 (放射疗法与肿瘤学)

年 卷 期：2012年第188卷第7期

页      面：599-605页

核心收录：

学科分类：0831[工学-生物医学工程（可授工学、理学、医学学位）] 100207[医学-影像医学与核医学] 1006[医学-中西医结合] 1002[医学-临床医学] 1001[医学-基础医学(可授医学、理学学位)] 08[工学] 1010[医学-医学技术（可授医学、理学学位）] 100106[医学-放射医学] 1009[医学-特种医学] 10[医学] 100602[医学-中西医结合临床] 

主　　题：Dose algorithm Acuros Monte Carlo AAA 

摘      要：The AcurosA (R) XB dose calculation algorithm by Varian and the Monte Carlo algorithm XVMC by Brainlab were compared with each other and with the well-established AAA algorithm, which is also from Varian. First, square fields to two different artificial phantoms were applied: (1) a slab phantom with a 3 cm water layer, followed by a 2 cm bone layer, a 7 cm lung layer, and another 18 cm water layer and (2) a lung phantom with water surrounding an eccentric lung block. For the slab phantom, depth-dose curves along central beam axis were compared. The lung phantom was used to compare profiles at depths of 6 and 14 cm. As clinical cases, the CTs of three different patients were used. The original AAA plans with all three algorithms using open fields were recalculated. There were only minor differences between Acuros and XVMC in all artificial phantom depth doses and profiles;however, this was different for AAA, which had deviations of up to 13% in depth dose and a few percent for profiles in the lung phantom. These deviations did not translate into the clinical cases, where the dose-volume histograms of all algorithms were close to each other for open fields. Only within artificial phantoms with clearly separated layers of simulated tissue does AAA show differences at layer boundaries compared to XVMC or Acuros. In real patient CTs, these differences in the dose-volume histogram of the planning target volume were not observed.