Dosimetric divergence in ICBT vs. IC/ISBT configurations: Comparative analysis of three optimization algorithms for cervical cancer brachytherapy

Jihong Chen, Jiabiao Hong, Kaiqiang Chen, Xiuchun Zhang, Guohua Wang and Penggang Bai

PLOS ONE, 2025, vol. 20, issue 11, 1-11

Abstract: Objective: To compare dosimetric differences among graphical-based manual planning (MA), simulated annealing inverse optimization (IPSA), and hybrid inverse optimization (HIPO) for cervical cancer in both intra-cavitary brachytherapy (ICBT) and interstitial brachytherapy combined with ICBT (IC/ISBT) settings, providing evidence for clinical optimization method selection. Methods: This study consisted of 60 cervical cancer patients undergoing CT-guided three-dimensional brachytherapy, including 30 ICBT patients and 30 IC/ISBT patients. Plans were generated using MA, IPSA, and HIPO. The dosimetric parameters for the high-risk clinical target volume (HRCTV) including D100%, V150%, V200%, conformity index (CI), homogeneity index (HI) were compared. Meanwhile, the dosimetric parameters D1cc, D2cc for the bladder, rectum, sigmoid, and total treatment time were evaluated. Results: Compared with MA, both IPSA and HIPO delivered lower doses to organs at risk (OARs). The total treatment time was significantly shorter for HIPO compared to IPSA and MA (P 0.05), while the CI was significantly better for HIPO (P

Date: 2025
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Persistent link: https://EconPapers.repec.org/RePEc:plo:pone00:0335405

DOI: 10.1371/journal.pone.0335405

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