Kubsad S S, Mackie T R, Gehring M A, Misisco D J, Paliwal B R, Mehta M P, Kinsella T J
Department of Human Oncology, University of Wisconsin Medical School, Madison 53792.
Int J Radiat Oncol Biol Phys. 1990 Oct;19(4):1027-35. doi: 10.1016/0360-3016(90)90029-j.
The dosimetry of small photon beams used for stereotactic radiosurgery was investigated using Monte Carlo simulation, convolution calculations, and measurements. A Monte Carlo code was used to simulate radiation transport through a linear accelerator to produce and score energy spectrum and angular distribution of 6 MV bremsstrahlung photons exiting from the accelerator treatment head. These photons were then transported through a stereotactic collimator system and into a water phantom placed at isocenter. The energy spectrum was also used as input for the convolution method of photon dose calculation. Monte Carlo and convolution results were compared with the measured data obtained using an ionization chamber, a diode, and film.
利用蒙特卡罗模拟、卷积计算和测量方法，对用于立体定向放射外科的小光子束剂量学进行了研究。使用蒙特卡罗代码模拟辐射通过直线加速器的传输过程，以生成并记录从加速器治疗头射出的6兆伏轫致辐射光子的能谱和角分布。然后，这些光子通过立体定向准直器系统传输到放置在等中心的水模体中。能谱也用作光子剂量计算卷积方法的输入。将蒙特卡罗和卷积结果与使用电离室、二极管和胶片获得的测量数据进行了比较。
