700 Journals and 15,000,000 Readers Each Journal is getting 25,000+ ReadersThis Readership is 10 times more when compared to other Subscription Journals (Source: Google Analytics)
Research Article Open Access
The aim of this study was to design a small phantom and evaluate its functionality for determining the accuracy and performance of megavoltage radiotherapy machines through an external quality audit. A small phantom was designed to check the photon beams at the reference and some non-reference conditions on a linac at three radiotherapy centers in Tehran. LiF TLDs were used for experimental dosimetry. A standard phantom with an ionization chamber and the Monte Carlo code were used to calculate the conversion factor of the doses in the small phantom to the conventional condition. At the reference condition, the amount of deviation between the measured and calculated doses for the radiotherapy center of A, B and C were -1.7, 5.8 and -1.4 percent at 6MV and -5.3, 6.8 and 0.6 percent at 18MV respectively. The deviations obtained at various non reference conditions ranged from 4.3 to 11.9%. The functionality of the simple phantom with the TLDs was confirmed as an appropriate dosimetry system to carry out intercomparison among radiotherapy centers.
To read the full article Peer-reviewed Article PDF
Author(s): Seyed Mostafa G Hosein G
Monte Carlo, Plexiglas phantom, Quality audit, Radiotherapy, Reference condition, Biomedical Physics, Computed Tomography, Diagnostic and Interventional, Radiology Physics, Fluoroscopy, Healthcare, Health Physics, Mammography, Medical Physics, Nuclear Medicine Physics, Radiation Oncology, Radiation, Protection, Radiation Safety, Therapeutic Physics, X-Rays