EVALUATION OF RADIATIONS SCATTERED FROM WATWR PHANTOM USING EGS CODE

Spiritualists increased radiation exposure in interventional radiology. It is considered that the most important factor is sideward radiations scattered from a patient. Therefore, it is important to evaluate characteristics of sideward-scattered radiations. In this work, the spectra of sideward-scattered radiations at various field sizes and X-ray tube voltage were calculated using EGS Monte Carlo simulation. Furthermore, the average and the effective energy were calculated by these spectra. As a result, although field sizes were changed, these spectra did not change. Moreover, when the X-ray tube voltage increased, the average and the effective energy became higher too.