Three-dimensional fourier transformation calculation of the radiation dose received from a60Co source

Conclusion A physical model and software for calculation of three-dimensional distribution of the absorbed dose (kerma) using the Fourier transformation was developed. Approaches to approximate calculation of the point core of scattered photons in tissue-equivalent medium were proposed, and the calculation errors were estimated. The developed method was used for determining the absorbed dose distribution in several typical cases. It was shown that Fourier transformation of 64 × 64 × 64 array took about 0.67 sec. Such a rate is sufficient for practical purposes. Analysis of the calculation results shows that the calculation error is reasonably low in the case of irradiation of a homogeneous medium. The case of heterogeneous media will be considered elsewhere.