Comparative Study of Dose Volume Parameters in 2-Dimensional Radiography and 3-Dimensional Computed Tomography Based High Dose Rate Intracavitary Brachytherapy in Cervical Cancer: A Prospective Study

Background: Present study compares two high-dose-rate intracavitary brachytherapy (ICBT) planning methods using two-dimensional orthogonal radiography and three-dimensional computed tomography (3D-CT) with regard to dose target volume organs at risk (OAR) in carcinoma cervix. Methodology: ICBT plans for 22-patients were compared 2D techniques. treatment generated 2D-orthogonal images was prescribed Point A while 3D-CT after contouring risk. In rectal bladder doses assessed as per ICRU-38 3D planning, 0.1cc, 0.2cc, 0.5cc 1cc of rectum evaluated. Doses organ risks (rectum bladder) each method. Results: Mean received by D90, D95 D100 8.05±1.59Gy, 7.19±1.43Gy 4.79±0.93Gy respectively. ICRU point 5.19±1.36Gy 5.03±0.36Gy D0.1cc, D0.2cc, D1cc, D2cc D5cc 2.38±0.80, 2.22±.75, 1.85±0.64, 1.51±0.64 1.29±.49 times higher than reference dose. Similarly mean 1.49±0.27, 1.43±.25, 1.25±0.23, 1.09±0.21 0.93±.21 Conclusion: This demonstrates suboptimal coverage underestimation OAR 2-dimensional when actual estimation done 3-dimensional the same session.