Ouafae CHFIK

Publications

• Review Article   
  Beam Energy Effects in Small-Field Dosimetry for 6 MV FFF and 10 MV FFF on Elekta Versa HD
  Author(s): Ouafae CHFIK*, EL Mahjoub CHAKIR, Mohamed OUALI ALAMI, Khalid EL OUARDY, Mohamed elghalmi and Yassine HERRASSI
  
  Flattening-filter-free (FFF) photon beams are increasingly used in modern radiotherapy due to their higher dose rates and reduced head scatter. In this study, we investigate the dosimetric differences between 6 MV FFF and 10 MV FFF photon beams from an Elekta Versa HD linear accelerator, with a focus on small field sizes (≤5×5 cm²). Percentage depth-dose (PDD) curves, lateral dose profiles, and relative output factors were measured in a water phantom using an ultra- small ionization chamber (IBA CC01, active volume 0.01 cm³) for field sizes of 1×1, 2×2, 3×3, 4×4, 5×5 cm², with 10×10 cm² as reference. The measured data were compared against the Elekta Golden Beam Data (GBD) provided by the linac manufacturer to verify beam model accuracy. Our results show that 10 MV FFF beams have a deeper depth of maximum dose and higher.. Read More»
  

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