A STUDY ON DOSIMETRIC COMPARISON BETWEEN POINT A BRACHYTHERAPY AND VOLUMETRIC BRACHYTHERAPY IN PATIENTS WITH LOCALLY ADVANCED CERVICAL CANCER

Abstract

Background: Locally invasive cervical cancer is managed using EBRT with chemotherapy and brachytherapy. Point A brachytherapy which integrates 2D images of the HR-CTV delivers not only deliver significant radiation dose, but also is associated with damage to the surrounding organs (organs at risk - OAR). However, volumetric brachytherapy which forms 3D images of HR-CTV using CT or MRI has lower radiation exposure to OAR’s.
Materials and Methods: A total of 30 patients with biopsy proven locally advanced cervical cancer who presented to the Department of radiation oncology, NRI medical college, Mangalagiri, Guntur were included in the study. All patients underwent EBRT with chemotherapy.
Results: The mean dose of radiation to OAR’s was significantly lower with volumetric brachytherapy than with point A brachytherapy.
Conclusion: present study concludes that radiation exposure to OAR is relatively lower with HDR- volumetry brachytherapy than with HDR- point A brachytherapy.