QUALITY CONTROL OF INTENSITY-MODULATED PLANS (VOLUMETRIC MODULATED ARC THERAPY - VMAT) IN RADIATION THERAPY ON THE VITALBEAM LINEAR ACCELERATOR

Abstract

Treatment planning in radiotherapy is a complex process that involves various steps. Quality control procedures are required at every stage to ensure that the accuracy of radiotherapy is maintained.

One of the main stages is the quality control of the plan in radiotherapy.

The process of quality control of radiation plans in radiation therapy with intensity modulation (Volumetric Modulated Arc Therapy - VMAT) on the VitalBeam linear accelerator is presented.

The widely used method of quality control on the portal detector (Electronic Portal Imaging Device, EPID) of the radiation therapy plan with intensity modulation (Volumetric Modulated Arc Therapy - VMAT) is considered. Comparison of dose distribution that is the overlapping of dose distribution contours. Isodose lines and a dose-volume histogram for a plan with intensity modulation are presented and the main dimensional geometries used in clinical practice for dosimetric examination of treatment plans are described.

Intensity modulated plan gamma analysis (VMAT) and gamma analysis criteria are defined. As well as the coverage of the physical volume of exposure. We assessed the quality control of dosimetric distributions of the intensity modulated treatment plan (VMAT) on the VitalBeam linear accelerator.