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Deep-Neural Network Approaches for Predicting 3D Dose Distribution in Intensity-Modulated Radiotherapy of the Brain Tumors Publisher Pubmed



Irannejad M1 ; Abedi I2 ; Lonbani VD3 ; Hassanvand M3
Authors
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Authors Affiliations
  1. 1. Department of Electrical Engineering, Najafabad Branch, Islamic Azad University, Najafabad, Iran
  2. 2. Medical Physics Department, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
  3. 3. Department of Physics, Isfahan University of Technology, Isfahan, Iran

Source: Journal of Applied Clinical Medical Physics Published:2024


Abstract

Purpose: The aim of this study is to reduce treatment planning time by predicting the intensity-modulated radiotherapy 3D dose distribution using deep learning for brain cancer patients. “For this purpose, two different approaches in dose prediction, i.e., first only planning target volume (PTV) and second PTV with organs at risk (OARs) as input of the U-net model, are employed and their results are compared.”. Methods and Materials: The data of 99 patients with glioma tumors referred for IMRT treatment were used so that the images of 90 patients were regarded as training datasets and the others were for the test. All patients were manually planned and treated with sixth-field IMRT; the photon energy was 6MV. The treatment plans were done with the Collapsed Cone Convolution algorithm to deliver 60 Gy in 30 fractions. Results: The obtained accuracy and similarity for the proposed methods in dose prediction when compared to the clinical dose distributions on test patients according to MSE, dice metric and SSIM for the Only-PTV and PTV-OARs methods are on average (0.05, 0.851, 0.83) and (0.056, 0.842, 0.82) respectively. Also, dose prediction is done in an extremely short time. Conclusion: The same results of the two proposed methods prove that the presence of OARs in addition to PTV does not provide new knowledge to the network and only by defining the PTV and its location in the imaging slices, does the dose distribution become predictable. Therefore, the Only-PTV method by eliminating the process of introducing OARs can reduce the overall designing time of treatment by IMRT in patients with glioma tumors. © 2023 The Authors. Journal of Applied Clinical Medical Physics published by Wiley Periodicals, LLC on behalf of The American Association of Physicists in Medicine.
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