Comparison of the IPSA and HIPO Algorithms for Interstitial Tongue High-dose-rate Brachytherapy

Overview

Journal PLoS One

Specialties General Medicine
Science

Date 2018 Oct 5

PMID 30286187

Citations 5

Authors

Chang Heon Choi

So-Yeon Park

Jong Min Park

Hong-Gyun Wu

Jin-Ho Kim

Jung-In Kim

Affiliations

Soon will be listed here.

Abstract

Purpose: This study aimed to compare the inverse planning simulated annealing (IPSA) stochastic algorithm with the hybrid inverse planning and optimization (HIPO) algorithm for interstitial tongue high-dose-rate (HDR) brachytherapy.

Methods: Twenty patients who received radiotherapy for tongue cancer using interstitial HDR brachytherapy were retrospectively selected for this study. Oncentra Brachy v. 4.3 was used for IPSA and HIPO planning. Four to eight fixed catheter configurations were determined according to the target shape. During the optimization process, predetermined constrain values were used for each IPSA and HIPO plan. The dosimetric parameters and dwell time were analyzed to evaluate the performances of the plans.

Results: The total dwell time using IPSA was 4 seconds longer than that of HIPO. The number of active positions per catheter for the IPSA plans were approximately 2.5 fewer than those of the HIPO plans. The dose-volumetric parameters related to the clinical target volume with IPSA were lower than those with HIPO. In terms of the dose-volumetric parameters related to normal tissue, HIPO tended to associate with slightly higher values than IPSA, without statistical significance. After GrO, the target coverages were satisfied to clinical goal for all patients. The total dwell times was approximately increased by 10%.

Conclusions: The IPSA and HIPO dose optimization algorithms generate similar dosimetric results. In terms of the dwell time, HIPO appears to be more beneficial.

Citing Articles

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Comparative analysis of dosimetric and radiobiological models of IPSA and HIPO algorithms in combined intra-cavitary/interstitial brachytherapy for cervical cancer.

Yan C, Wang X, Wen A, Luo J, Zhang S, Wang P J Contemp Brachytherapy. 2023; 15(3):212-219.

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Frohlich G, Geszti G, Vizkeleti J, Agoston P, Polgar C, Major T Strahlenther Onkol. 2019; 195(11):991-1000.

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