Dosimetric Comparison between High Dose Rate Brachytherapy Boost and Volumetric Arc Therapy Boost in Locally Advanced Cancer Cervix

Concurrent chemoradiotherapy is considered the standard treatment for locally advanced cancer cervix (LACC). Radiotherapy commonly administered by a three-dimensional conformal radiotherapy (3DCRT) approach followed brachytherapy (BT). High dose rate (HDR) BT administered; however, several drawbacks exist including invasive technique, pain, requirement of anesthesia, and operative risks. We assessed dosimetric difference between HDR volumetric modulated arc therapy (VMAT) boost in those patients. Ten patients were selected retrospectively with LACC all received whole pelvis 7 Gy three fractions. The computed tomography (CT) image was transferred to Varian system VMAT plan while one applicator Sagi planning high-risk clinical target volume (HR-CTV), bladder, rectum, sigmoid, small bowel delineate margin 5 mm added CTV create (PTV). D90 PTV lower than HR-CTV boost. Mean higher that HR-CTV. D2cc rectum compared VMAT. an option exists who refuse or cannot tolerate it, case nonavailability nonworking machine.