Cyril Voyant* and Daniel Julian
The limits of classical equivalent computation based on time, dose, and fractionation (TDF) and linear quadratic models have been known for a long time. Medical physicists and physicians are required to provide fast and reliable interpretations regarding the delivered doses or any future prescriptions relating to treatment changes.
Yuanshui Zheng* and Xiaoning Ding
Purpose: Accurate patient positioning is crucial in radiation therapy. To fully benefit from the preciseness of proton therapy, image guided patient positioning and verification system is typically utilized in proton therapy. The purpose of this study is to evaluate the inter-observer variability of image alignment using a commercially available patient positioning and verification system in proton therapy.
Mohamed Elsafi, Mona. M. Gouda, Mohamed. S. Badawi*, Abouzeid. A. Thabet, Ahmed. M. El-Khatib, Mahmuod. I. Abbas and Kholud. S. Almugren
In gamma-ray spectrometry, the analysis of the environmental radioactivity samples (soil, sediment and ash of a living organism) needs to know the linear attenuation coefficient of the sample matrix. This coefficient is required to calculate the self-absorption correction factor through the sample bulk.
Ahmed. M. El Khatib, Mohamed. S. Badawi*, Mohamed. A. Elzaher, Mona. M. Gouda, Abouzeid. A. Thabet, Mahmoud. I. Abbas and Kholud. S. Almugren
Determination of the detector efficiency using volumetric cylindrical sources is very important in various scientific and industrial fields, especially in the field of quantitative analysis. To calculate the absolute activity of any sample, the full-energy peak efficiency (FEPE) of the detector is needed. By applying the efficiency transfer method, the FEPE of the detector would be determined easily without using the standard sources. This approach depends on two main factors.
Maaz Zuhayra, Marlies Marx, Ulrich Karwacik, Yi Zhao and Ulf Lützen*
Introduction: Radioiodine therapy is a standard procedure in thyroid autonomy treatment. Discrepancies in the visual comparisons of the scintigraphies prepared for this purpose using Tc-99m-O4- and I-131 have been known for years. In this study a new method is used to calculate and perform a quantitative comparison of both uptakes using subtraction analysis and 3D imaging. The results and their causes are discussed together with practice-relevant conclusions for better clinical results.