东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2009, Vol. 30 ›› Issue (1): 71-74.DOI: -

• 论著 • 上一篇    下一篇

卷积叠加光子剂量计算的实现和验证

张铁;李建东;康雁;   

  1. 东北大学信息科学与工程学院;东软医疗系统有限公司;东北大学中荷生物医学与信息工程学院;
  • 收稿日期:2013-06-22 修回日期:2013-06-22 出版日期:2009-01-15 发布日期:2013-06-22
  • 通讯作者: Zhang, T.
  • 作者简介:-
  • 基金资助:
    国家自然科学基金资助项目(10771031)

Implementation and verification of photon dose calculation using convolution/superposition algorithm

Zhang, Tie (1); Li, Jian-Dong (1); Kang, Yan (2)   

  1. (1) School of Information Science and Engineering, Northeastern University, Shenyang 110004, China; (2) Neusoft Medical System Co. Ltd., Shenyang 110179, China; (3) School of Sino-Dutch Biomedical and Information Engineering, Northeastern University, Shenyang 110004, China
  • Received:2013-06-22 Revised:2013-06-22 Online:2009-01-15 Published:2013-06-22
  • Contact: Zhang, T.
  • About author:-
  • Supported by:
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摘要： 针对collapsed cone卷积叠加模型光子剂量计算算法的实现,使用蒙特卡罗程序计算的多能谱计算了主注量或TERMA;采用Hoban提出的方法对射束硬化进行修正;采用Ahnesjo的平方反比定律对核倾斜进行修正.使用AAPM数据测试包和实际临床数据,对算法进行了精确性验证.结果表明测量数据和计算结果有很好的符合性,剂量计算的精度达到了3%或者3 mm的误差要求,充分说明了基于卷积叠加模型的临床可行性.

关键词: 放射治疗, 光子束, 剂量计算, 卷积叠加, 验证

Abstract: Aiming at the implementation of the collapsed cone convolution/superposition dose calculation algorithm, the primary fluence or TERMA (total energy released per unit mass) is calculated using a polyenergetic spectrum which is formed with Monte Carlo code. The Hoban's algorithm is introduced into beam hardening correction, and the Ahnesjo's inverse square law is introduced to correct the kernel tilting at the dose deposition site. The accuracy of the algorithm was verified by using AAPM phantom data test packet and clinically measured data. The results revealed that the measured values conform well to the calculated results, and the accuracy of dose calculated is within 3% or 3 mm. The clinical feasibility of the collapsed cone convolution/superposition dose algorithm is therefore illustrated.

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