Company F Z, Allen B J
Department of Physics, University of Western Sydney Nepean, Kingswood, NSW Australia.
Australas Phys Eng Sci Med. 1996 Dec;19(4):217-24.
The lateral absorbed dose, depth dose and photon fluence in a water phantom of a single microplanar beam is investigated using the Monte Carlo method. To validate the calculated axial and scattered photon fluence, an experiment is carried out using a NaI(TI) detector and 20 mCi Cd-109 source at energies of 22 keV and 88 keV. A 150 microns collimator is used to produce the microplanar beam, and the integrated scattered photon fluence is measured over 2.5 microns increments. The axial (depth) photon fluence is in good agreement with the calculated results. The scattered (lateral) photon fluence results agree to within two standard deviations.
使用蒙特卡罗方法研究了单个微平面束在水模体中的侧向吸收剂量、深度剂量和光子注量。为了验证计算得到的轴向和散射光子注量，使用碘化钠（铊）探测器和能量为22 keV和88 keV的20毫居里镉 - 109源进行了一项实验。使用150微米的准直器产生微平面束，并以2.5微米的增量测量积分散射光子注量。轴向（深度）光子注量与计算结果吻合良好。散射（侧向）光子注量结果在两个标准差范围内相符。
