Evaluation of Quality Control in Radiotherapy Departments of the National Oncology Centers, In Sudan for Simulator and Cobalt-60

Abstract

This study addresses Evaluation of quality control in radiotherapy departments of the (NOC), In Sudan. The general objective was to ensure the quality of the cobalt-60(Equinox, MDS) in (RICK) and Co-60(Cirus), simulator in Al-Jazeera machines, A radiation dosimeter shall ensure that exposure minimum is normal tissue during radiotherapy and apply of QC includes minimum radiation to staff and public. To achieve that 19 QC tests were applied to CO-60(MDS, Equinox and Cirus) machines, the majority passed the following mechanical checks successfully which are: Safety interlocks control, Hand switch box, lamp indicator, Door interlock, Emergency switch, Table movement, Gantry rotation, Power supply, SSD accuracy=100cm, Treatment stop timer, Field size indicator, Audio visual monitor, Light radiation coincidence, Wedges, collimator; gantry and couch rotation isocenter. But the Co-60(Cirus) failed in rotation of couch isocenter,Lamp indicator all broken ,Laser Damage lateral damage, Co-60 (MDS) failed in laser and the Co- 60(equinox) is stopping because SSD is not functional, gantry rotation isosenter at 1800 , SSD is not functional ,laser low intensity . The Result of the 17 QC tests of simulator machine explained that this machine suffer from some problems such as Lamp light, Hand switch difficult and the stopping of Couch rotate isocenter field size error 4mm notaccepted. Finally, CO-60 (MDS) passed measurements of absorbed dose and out put constancy successfully with error 1% of the standard value.