engleski

Dosimetric verification of intensity modulated radiotherapy (IMRT) treatment plans for prostate cancer patients

Intensity modulated radiotherapy (IMRT) has become widely used as a standard radiation therapy technique for a treatment of localized prostate cancer. Advancing from conformal radiotherapy (3D CRT) to a more complex IMRT technique brought the need for more thorough verification of the accuracy in the dose delivery. In this work we present the clinical workflow and the results of patient specific quality assurance (PSQA) procedures for 40 prostate cancer patients treated with step and shot IMRT, since its implementation in our routine clinical practice. PSQA procedures include dosimetric verification of each treatment plan with dedicated rotational phantom and high- resolution matrix detector system Octavius 4D (PTW Freiburg) which allows three-dimensional comparison of the calculated and delivered radiation dose distribution. Our results proved compliance with the universal tolerance limits recommended for those procedures (1), giving the confidence in safety of the treatment and a challenge for the adoption of more stringent constraints in the future.

prostate IMRT ; patient specific QA

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