engleski

Reinforcing of QA/QC programs in radiotherapy departments in Croatia : Results of treatment planning system verification

Implementation of advanced techniques in clinical practice can greatly improve outcome of radiation therapy but it also makes the process much more complex with a lot of room for errors. An important part of the quality assurance programme is verification of treatment planning system (TPS). Dosimetric verifications in anthropomorphic phantom were performed in four centres where new systems were installed. Total of 14 tests for two photon energies and multigrid superposition algorithm were performed using CMS XiO treatment planning system. Evaluation criteria as specified in IAEA TRS 430 were employed. The results of measurements are grouped according to the placement of the measuring point and the beam energy. The majority of differences between calculated and measured doses in water equivalent part of the phantom were in tolerance. Significant number out of tolerance values were observed in ‘nonwater equivalent’ parts of the phantom, especially for higher energy photon beams. This survey was done as a part of continuous effort to build up awareness of QA/QC importance in the Croatian radiotherapy community. Understanding the limitations of different parts of various systems used in radiation therapy can systematically improve quality as well.

Radiation therapy ; quality control ; dosimetry ; treatment planning system

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