Quality Assurance Program for Radiosurgery at Clinicas Hospital: Results of Implementation

摘要

Due to the complexity of the Radiosurgery and fractioned stereotactic radiotherapy processes, it is mandatory to establish a proper quality assurance program for each patient to be treated with this treatment modality [1]. In this work, such program will be described. The QA tests require a proper phantom as well as appropriate dosimetric equipments such as ion chambers and stereotactic diodes, solid water phantom, radiographic films in order to perform all periodic tests. This investigation was performed in a linear accelerator Varian 6EX associated with a BrainLab micro-multileaf collimator system (m3) at Clinicas Hospital. Since the most important QA test in Radiosurgery is the periodic verification of the mechanical stability of the nominal isocenter, a checklist for the treatment procedure was elaborated for each individual patient. Once this verification is performed, the patient is then positioned for treatment.