Tumor co-segmentation in PET/CT using multi-modality fully convolutional neural network Journal Article

Authors: Zhao, X.; Li, L.; Lu, W.; Tan, S.
Article Title: Tumor co-segmentation in PET/CT using multi-modality fully convolutional neural network
Abstract: Automatic tumor segmentation from medical images is an important step for computer-aided cancer diagnosis and treatment. Recently, deep learning has been successfully applied to this task, leading to state-of-the-art performance. However, most of existing deep learning segmentation methods only work for a single imaging modality. PET/CT scanner is nowadays widely used in the clinic, and is able to provide both metabolic information and anatomical information through integrating PET and CT into the same utility. In this study, we proposed a novel multi-modality segmentation method based on a 3D fully convolutional neural network (FCN), which is capable of taking account of both PET and CT information simultaneously for tumor segmentation. The network started with a multi-task training module, in which two parallel sub-segmentation architectures constructed using deep convolutional neural networks (CNNs) were designed to automatically extract feature maps from PET and CT respectively. A feature fusion module was subsequently designed based on cascaded convolutional blocks, which re-extracted features from PET/CT feature maps using a weighted cross entropy minimization strategy. The tumor mask was obtained as the output at the end of the network using a softmax function. The effectiveness of the proposed method was validated on a clinic PET/CT dataset of 84 patients with lung cancer. The results demonstrated that the proposed network was effective, fast and robust and achieved significantly performance gain over CNN-based methods and traditional methods using PET or CT only, two V-net based co-segmentation methods, two variational co-segmentation methods based on fuzzy set theory and a deep learning co-segmentation method using W-net. © 2018 Institute of Physics and Engineering in Medicine.
Keywords: computerized tomography; medical imaging; tumors; diseases; image segmentation; computer aided diagnosis; entropy; neural networks; deep learning; convolution; convolutional neural network; deep neural networks; multi-modality imaging; deep convolutional neural networks; co-segmentation; feature fusion; fuzzy set theory; anatomical information; co segmentations; metabolic information; state-of-the-art performance
Journal Title: Physics in Medicine and Biology
Volume: 64
Issue: 1
ISSN: 0031-9155
Publisher: IOP Publishing Ltd  
Date Published: 2019-01-01
Start Page: 015011
Language: English
DOI: 10.1088/1361-6560/aaf44b
PUBMED: 30523964
PROVIDER: scopus
PMCID: PMC7493812
Notes: Export Date: 1 February 2019 -- Source: Scopus
Citation Impact
MSK Authors
  1. Wei   Lu
    57 Lu