Monte Carlo Simulation of Bony Heterogeneity Effects on Dose Profile for Small Irradiation Field in Radiotherapy

被引：4

作者：

Cardoso, Simone C. ^{[1
]}

Alves, Victor Gabriel L. ^{[1
]}

da Rosa, Luiz Antonio R. ^{[2
]}

Campos, Luciana T. ^{[2
]}

Batista, Delano V. S. ^{[3
]}

Facure, Alessandro ^{[4
]}

机构：

[1] Univ Fed Rio de Janeiro, Inst Fis, Rio De Janeiro, Brazil

[2] CNEN, IRD, Rio De Janeiro, Brazil

[3] Inst Nacl Canc INCA, Rio De Janeiro, Brazil

[4] Comissao Nacl Energia Nucl, Rio De Janeiro, Brazil

来源：

PLOS ONE | 2010年 / 5卷 / 05期

关键词：

CALCULATION ALGORITHMS; EQUIVALENT HETEROGENEITIES; STEREOTACTIC RADIOSURGERY; SMALL BEAMS; PHOTON; DISTRIBUTIONS; DOSIMETRY; PHANTOMS; ENERGY;

D O I：

10.1371/journal.pone.0010466

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

In the radiotherapy treatment planning of a lesion located in the head region with small field radiation beams, the heterogeneity corrections play an important role. In this work, we investigated the influence of a bony heterogeneity on dose profile inside a soft tissue phantom containing a bony material. PDD curves were obtained by simulation using the Monte Carlo code EGSnrc and employing Eclipse (R) treatment planning system algorithms (Batho, Modified Batho, Equivalent TAR and Anisotropic Analytic Algorithm) for a 15 MV photon beam and field sizes of 2x2 and 10x10 cm(2). The Equivalent TAR method exhibited better agreement with Monte Carlo simulations for the 2x2 cm(2) field size. The magnitude of the effect on PDD due to the bony heterogeneity for 1x1, 2x2 and 10x10 cm(2) field sizes increases to 10, 5 and 3%, respectively.

引用

页数：5

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