Dosimetric Comparative Analysis of Volumetric Modulated Arc Therapy and Intensity-Modulated Radiation Therapy in Cervical Cancer

Abstract

Objective: To carry out dosimetric comparison between volumetric modulated arc therapy (VMAT) and intensity-modulated radiation therapy (IMRT) in cervical cancer. Methods: 50 postoperative cervical cancer patients were included in this study. The patients were admitted for treatment from January 2021 to January 2022. VMAT and IMRT plans were designed for each patient to analyze the dose distribution in the target area of the two treatment techniques. Results: Comparing the monitor unit for single treatment (638.21 ± 116.21 MU) and time of single treatment (143.21 ± 23.14 s) in the observation group and the monitor unit for single treatment (932.14 ± 74.11 MU) and time of single treatment (223.14 ± 17.26 s) in the control group, there was significant difference (P < 0.05); there was also significant difference (P < 0.05) between the normal tissue (bladder and rectum) of the observation group and that (bladder and rectum) of the control group. Conclusion: VMAT is more effective in cervical cancer, and it has a certain protective effect on normal tissues in patients and can reduce the radiation dose.