Author(s)

Saed J. Al Atawneh^1,2*

¹Department of Radiation Oncology, King Hussein Cancer Center, Amman, Jordan.
²Department of Physics, Faculity of Science, Al-Balqa Applied University, Al-Salt, Jordan.

We present the Empirical Formula (EF) to calculate the phantom scatter factor, S_p, of small radiation fields under charge particle dis-equilibrium conditions. The Empirical Formula (EF) was verified by examining the calculated data with experimentally measured data utilizing the anthropomorphic phantom in twelve different combinations of beam entry and point location, where the value for S_p per tissue composition was within 3% in 8/12 cases, 5% in 1/12 cases, and 10% in 3/12 cases. Our results showed a good agreement with experimental data to less than 1% when the ion chamber was surrounded by the homogeneous tissue, whether lung, soft tissue, or bone. Indicating that the prediction of the equation is valid, and it can be reliably used for phantom scatter factor calculation for different homogeneous media under charge particle dis- equilibrium conditions.

Small Field Dosimetry, Anthropomorphic Study, Phantom Scatter Factor, Dosimetry

Atawneh, S. (2022) Empirical Formalism for the Phantom Scatter Factor of Small Fields: Using Different Density Media. International Journal of Medical Physics, Clinical Engineering and Radiation Oncology, 11, 36-47. doi: 10.4236/ijmpcero.2022.111004.