Ocena odtwarzalnosci ulozenia chorych na nowotwory okolicy glowy i szyi poddanych radioterapii IMRT z wykorzystaniem weryfikacji XVI (X-ray Volume Imaging)

Abstract

Author(s): Monika Konopka-Filippow, Dominika Hempel, Anna Musko, Marek Wojtukiewicz, Tomasz Filipowski, Ewa Sierko

Introduction:Radiotherapy in head and neck cancer patients is therapeutic challenge to provide accurate dose in defined area with saving of critical organs. Realization this procedure enables modern therapeutic techniques, such as IMRT, requiring of patient repositioning with millimetre accuracy, which allows imaging system based on computed tomography - XVI.

Aim: Analysis of abnormalities in head and neck cancer patients reposition during radical IMRT radiotherapy based on the system of XVI verification.

Materials and Methods: The study group included 16 patients (6 women and 10 men) undergo radical radiotherapy 3D IMRT for head and neck area in the Department of Radiation Oncology Center Bialystok. Position was verified by a system XVI integrated with the head of therapeutic Elekta.

Results: The highest average values in patient positioning observed in the Z axis (0.09 cm, SD = 0.19), the lowest in the Y axis (0,045cm, SD = 0.16) in the X axis were 0,056cm, (SD = 0.15) for all the measurements before the fraction of radiotherapy. The highest average values of errors in patient positioning were recorded before the 4th, 22nd and 3rd faction RT respectively for the X, Y and Z. The highest average value registered in the age group 51-60 years and> 70 years, the smallest in the group <50 years. The average value of patients shifts stabilized by thermoplastic mask with a mouthpiece (n = 4, 25%) was 0.1 cm (SD = 0.11) and without the mouthpiece (n = 12, 75%) 0,13cm (SD = 0, 23) in all axes.

Conclusion: The results of verification the head and neck cancer patients positioning with XVI showed high accuracy 3D IMRT radiotherapy. Systematic verification of patient positioning is important for the individual patient. The control of patient position and elimination of abnormalities affects the quality assurance of radiotherapy, which results in treatment outcomes.

Share this article