arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2106.03705cs.CV
收藏

使用一致/无偏自动计划进行常规肺IMRT的深度学习3D剂量预测

Deep Learning 3D Dose Prediction for Conventional Lung IMRT Using Consistent/Unbiased Automated Plans

Georgia Institute of Technology(佐治亚理工学院);Memorial Sloan-Kettering Cancer Center(纪念斯隆-凯特琳癌症中心)

Navdeep Dahiya, Gourav Jhanwar, Anthony Yezzi, Masoud Zarepisheh, Saad Nadeem

摘要:

深度学习(DL)3D剂量预测最近受到了广泛关注。然而,由具有广泛专业知识的规划者手动生成的训练数据集中的计划质量的可变性可能会极大地影响最终预测的质量。此外,临床标准的任何变化都需要规划者手动生成一组新的计划,以构建新的预测模型。在这项工作中,我们使用我们内部的自动规划系统(名为"ECHO“)生成的一致计划来训练DL模型。ECHO(expedited constrained hierarchical optimization)通过顺序求解大规模约束优化问题来生成一致/无偏规划。如果临床标准改变,则可以使用ECHO容易地离线生成新的训练数据集,而没有或有限的人为干预,使得基于DL的预测模型容易地适应临床实践中的变化。我们使用了120名具有不同波束配置的传统肺部患者(100名用于训练,20名用于测试),并使用手动生成以及自动ECHO计划训练了我们的DL模型。我们评估了不同的输入:(1)CT+(PTV/OAR)轮廓,和(2)CT+轮廓+射束配置,以及不同的损失函数:(1)MAE(平均绝对误差),和(2)MAE+DVH(剂量体积直方图)。预测的质量进行了比较,使用不同的DVH指标以及剂量分数和DVH分数,最近推出的AAPM知识为基础的规划大挑战。使用自动ECHO计划和CT+轮廓+射束作为训练输入,MAE+DVH作为损失函数,获得了最佳结果。

英文摘要:

Deep learning (DL) 3D dose prediction has recently gained a lot of attention. However, the variability of plan quality in the training dataset, generated manually by planners with wide range of expertise, can dramatically effect the quality of the final predictions. Moreover, any changes in the clinical criteria requires a new set of manually generated plans by planners to build a new prediction model. In this work, we instead use consistent plans generated by our in-house automated planning system (named ``ECHO'') to train the DL model. ECHO (expedited constrained hierarchical optimization) generates consistent/unbiased plans by solving large-scale constrained optimization problems sequentially. If the clinical criteria changes, a new training data set can be easily generated offline using ECHO, with no or limited human intervention, making the DL-based prediction model easily adaptable to the changes in the clinical practice. We used 120 conventional lung patients (100 for training, 20 for testing) with different beam configurations and trained our DL-model using manually-generated as well as automated ECHO plans. We evaluated different inputs: (1) CT+(PTV/OAR)contours, and (2) CT+contours+beam configurations, and different loss functions: (1) MAE (mean absolute error), and (2) MAE+DVH (dose volume histograms). The quality of the predictions was compared using different DVH metrics as well as dose-score and DVH-score, recently introduced by the AAPM knowledge-based planning grand challenge. The best results were obtained using automated ECHO plans and CT+contours+beam as training inputs and MAE+DVH as loss function.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑