Exploring and comparing data selection methods in the pre-processing step of a deep learning framework for automatic tumor segmentation on PET-CT images
Průzkum a porovnání metod výběru dat pro předzpracování vstupu modelu hlubokého učení pro automatickou segmentaci nádorů na snímcích PET-CT
Authors
Supervisors
Reviewers
Editors
Other contributors
Journal Title
Journal ISSN
Volume Title
Publisher
České vysoké učení technické v Praze
Czech Technical University in Prague
Czech Technical University in Prague
Date of defense
Abstract
Automatic segmentation of primary tumors in oropharyngeal cancer patients using PET/CT images and deep learning has the potential to improve radiation oncology workflows. However, 2D tumor segmentation using deep learning is a data imbalance problem and a method of PET and CT slice selection affects the convergence of the deep learning model. The aim of the current project was to find a way to select sequences to improve the performance of the existing deep learning segmentation model. To select the 'right amount' of sequences without tumor in an unsupervised manner, clustering methods were explored. The trained clustering algorithms were used to group the training and validation data of the existing segmentation model in into clusters. The performance of the proposed method was assessed using the existing segmentation model. The promising results of the proposed data selection method were confirmed by improved metrics of the segmentation model (mean dice score coefficient, precision and recall).
Automatic segmentation of primary tumors in oropharyngeal cancer patients using PET/CT images and deep learning has the potential to improve radiation oncology workflows. However, 2D tumor segmentation using deep learning is a data imbalance problem and a method of PET and CT slice selection affects the convergence of the deep learning model. The aim of the current project was to find a way to select sequences to improve the performance of the existing deep learning segmentation model. To select the 'right amount' of sequences without tumor in an unsupervised manner, clustering methods were explored. The trained clustering algorithms were used to group the training and validation data of the existing segmentation model in into clusters. The performance of the proposed method was assessed using the existing segmentation model. The promising results of the proposed data selection method were confirmed by improved metrics of the segmentation model (mean dice score coefficient, precision and recall).
Automatic segmentation of primary tumors in oropharyngeal cancer patients using PET/CT images and deep learning has the potential to improve radiation oncology workflows. However, 2D tumor segmentation using deep learning is a data imbalance problem and a method of PET and CT slice selection affects the convergence of the deep learning model. The aim of the current project was to find a way to select sequences to improve the performance of the existing deep learning segmentation model. To select the 'right amount' of sequences without tumor in an unsupervised manner, clustering methods were explored. The trained clustering algorithms were used to group the training and validation data of the existing segmentation model in into clusters. The performance of the proposed method was assessed using the existing segmentation model. The promising results of the proposed data selection method were confirmed by improved metrics of the segmentation model (mean dice score coefficient, precision and recall).
Description
Citation
Underlying research data set URL
Permanent link
Rights/License
A university thesis is a work protected by the Copyright Act of the Czech Republic. Extracts, copies and transcripts of the thesis are allowed for personal use only and at one`s own expense. The use of thesis should be in compliance with the Copyright Act.
Vysokoškolská závěrečná práce je dílo chráněné autorským zákonem. Je možné pořizovat z něj na své náklady a pro svoji osobní potřebu výpisy, opisy a rozmnoženiny. Jeho využití musí být v souladu s autorským zákonem v platném znění.
Vysokoškolská závěrečná práce je dílo chráněné autorským zákonem. Je možné pořizovat z něj na své náklady a pro svoji osobní potřebu výpisy, opisy a rozmnoženiny. Jeho využití musí být v souladu s autorským zákonem v platném znění.