Comparison of IMRT dose calculations with a PBC and AAA algorithms in the lung cancer
the pencil beam convolution (PBC) algorithms in radiation treatment planning system are widely used to calculate the radiation dose.A new photon dose calculation algorithm as known as anisotropic analytical algorithm (AAA) released in the Varian medical system.The aim of this paper is to investigate the difference of dose calculation between AAA and PBC algorithm at the intensity modulated radiotherapy (IMRT) plan on the lung cancer case with a inhomogeneity for the low density.We analyzed quantitatively dose difference using the eclipse planning system and ImRT matirxx equipment to compare the gamma evaluation.The 11 patients with lung cancer in the various sites were selected.Almost of the normal tissue did not changed significantly for the maximum,mean,minimum dose.But the volume of the PTV covered by the 95% isodose curve was decreased by 6% with inhomogeneity due to the difference of the algorithms.From this result,acceptable criteria of the treatment plan calculated by AAA algorithm should be re-evaluated.
anisotropic analytical algorithm (AAA) pencil beam convolution (PBC) dose difference lung cancer intensity modulated radiation therapy (IMRT)
Se An Oh Min Kyu Kang Ji Woon Yea Sung Hoon Kim Sung Kyu Kim
Department of Physics, Yeungnam University, Gyeongbuk, Korea Department of Radiation Oncology, Yeungnam University College of Medicine, Daegu, Korea
国际会议
World Congress on Medical Physics and Biomedical Engineering (2012年医学物理及生物医学工程国际会议(IFMBE))
北京
英文
1811-1813
2012-05-26（万方平台首次上网日期，不代表论文的发表时间）