Dosimetry of Medical Linear and Its Use in The Treatment Planning System

Two medical linear accelerators Elekta Synergy Platform are in use on Hygeia Hospital Tirana, for radiotherapy purposes. The high voltage of linear accelerator is between 6 and 18 MV. The dosimetry of the X-rays beam of two accelerators is performed in regular basis by ionization chambers with small volumes. The data of the dosimetric measurements enters into database of XIO treatment planning system (TPS) and along computed tomography (CT) data, serve as initial data for TPS preparing, aiming the irradiation process of the target volume with high precision using one or some radiation fields. Based in our measurements 100 monitor units (MU) gave the dose of 1,009 Gy for high voltage 6 MV and 1,004 Gy for high voltage of 18 MV with uncertainty of 1%