Evidence map›Paper›PMID 37403141›Full record

ArticleRadiation oncology (London, England)2023

Simultaneous dose distribution and fluence prediction for nasopharyngeal carcinoma IMRT.

Yongbao Li, Wenwen Cai, Fan Xiao, Xuanru Zhou, Jiajun Cai, Linghong Zhou, Wen Dou, Ting Song

Abstract read
In one paragraph

Article in Radiation oncology (London, England), 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
9citing papers in PubMed, 2 pooled it
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1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

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3 · Its place in the literature

Who cites it

9 citing papers in PubMed, 2 syntheses or guidelines pooled it.

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4 · The record

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5 · Who and what money

Authors and funding

8 authors.

Yongbao Li *Department of Radiation Oncology, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, 510060, China.
Wenwen Cai *School of Biomedical Engineering, Southern Medical University, Guangzhou, 510515, China.
Fan XiaoSchool of Biomedical Engineering, Southern Medical University, Guangzhou, 510515, China.
Xuanru ZhouSchool of Biomedical Engineering, Southern Medical University, Guangzhou, 510515, China.
Jiajun CaiSchool of Biomedical Engineering, Southern Medical University, Guangzhou, 510515, China.
Linghong ZhouSchool of Biomedical Engineering, Southern Medical University, Guangzhou, 510515, China.
Wen DouZhujiang Hospital, Southern Medical University, Guangzhou, 510282, China. dou_wen@163.com.
Ting SongSchool of Biomedical Engineering, Southern Medical University, Guangzhou, 510515, China. tingsong2015@smu.edu.cn.

Funding

Guangdong Basic and Applied Basic Research Foundation, China 2021A1515012044Guangdong Basic and Applied Basic Research Foundation, China 2022A1515010639Guangzhou Science and Technology Foundation, China SL2022A04J01215
6 · The paper itself

Abstract

backgroundCurrent intensity-modulated radiation therapy (IMRT) treatment planning is still a manual and time/resource consuming task, knowledge-based planning methods with appropriate predictions have been shown to enhance the plan quality consistency and improve planning efficiency. This study aims to develop a novel prediction framework to simultaneously predict dose distribution and fluence for nasopharyngeal carcinoma treated with IMRT, the predicted dose information and fluence can be used as the dose objectives and initial solution for an automatic IMRT plan optimization scheme, respectively.

methodsWe proposed a shared encoder network to simultaneously generate dose distribution and fluence maps. The same inputs (three-dimensional contours and CT images) were used for both dose distribution and fluence prediction. The model was trained with datasets of 340 nasopharyngeal carcinoma patients (260 cases for training, 40 cases for validation, 40 cases for testing) treated with nine-beam IMRT. The predicted fluence was then imported back to treatment planning system to generate the final deliverable plan. Predicted fluence accuracy was quantitatively evaluated within projected planning target volumes in beams-eye-view with 5 mm margin. The comparison between predicted doses, predicted fluence generated doses and ground truth doses were also conducted inside patient body.

resultsThe proposed network successfully predicted similar dose distribution and fluence maps compared with ground truth. The quantitative evaluation showed that the pixel-based mean absolute error between predicted fluence and ground truth fluence was 0.53% ± 0.13%. The structural similarity index also showed high fluence similarity with values of 0.96 ± 0.02. Meanwhile, the difference in the clinical dose indices for most structures between predicted dose, predicted fluence generated dose and ground truth dose were less than 1 Gy. As a comparison, the predicted dose achieved better target dose coverage and dose hot spot than predicted fluence generated dose compared with ground truth dose.

conclusionWe proposed an approach to predict 3D dose distribution and fluence maps simultaneously for nasopharyngeal carcinoma patients. Hence, the proposed method can be potentially integrated in a fast automatic plan generation scheme by using predicted dose as dose objectives and predicted fluence as a warm start.

Indexed as

Nasopharyngeal NeoplasmsRadiotherapy, Intensity-ModulatedHumansNasopharyngeal CarcinomaRadiotherapy DosageRadiotherapy Planning, Computer-AssistedDose distribution predictionFluence predictionIMRTNasopharyngeal carcinomaShared encoder network

Identifiers

PMID37403141
PMCPMC10320945

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.