Evaluation of absorbed dose in the case of head-neck cancer with intensity modulated radiotherapy using PRIMO with photon energy of 6MV

The use of radiotherapy as a cancer treatment modality is growing very rapidly. One of the cases of head-neck cancer is nasopharyngeal cancer which was performed using the Intensity Modulated Radiotherapy (IMRT) technique. This study aims to evaluate the target and organs at risk (OARs) absorption dose using PRIMO and DICOM TCIA HNSCC-01-0190 data with IMRT technique number of fields 9 using a photon energy of 6 MV. Data Data is processed using PRIMO software to obtain DVH data. The Gamma analysis method with acceptance criteria of 3%, 3 mm, was used to compare dose distribution. The validation of the PRIMO dose calculation shows a minimum gamma analysis pass of 83%. From the research results obtained, Percentage Aggregation (PA) has a value of more than 90%. It shows that PRIMO can validate the treatment planning system using variations in the number of fields.