A Stacked Multi-Connection Simple Reducing Net for Brain Tumor Segmentation
It is well known that the Unet has been widely used in the area of medical image segmentation because of the cascade connection in the up-sampling process. However, it does not perform well in dealing with complex medical images, such as brain MRI. In order to achieve better segmentation performance...
| Main Authors: | , , , , , |
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| Format: | Article |
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IEEE
2019-01-01
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| Series: | IEEE Access |
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| Online Access: | https://ieeexplore.ieee.org/document/8753510/ |
| _version_ | 1831687440319905792 |
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| author | Yi Ding Fujuan Chen Yang Zhao Zhixing Wu Chao Zhang Dongyuan Wu |
| author_facet | Yi Ding Fujuan Chen Yang Zhao Zhixing Wu Chao Zhang Dongyuan Wu |
| author_sort | Yi Ding |
| collection | DOAJ |
| description | It is well known that the Unet has been widely used in the area of medical image segmentation because of the cascade connection in the up-sampling process. However, it does not perform well in dealing with complex medical images, such as brain MRI. In order to achieve better segmentation performance by adopting the Unet, many researchers have paid more attention to stacking the Unet. However, the stacking process leads to a large increase in the number of parameters. This is not a good choice when considering the tradeoff between precision and efficiency. Another problem is that as the depth of the network increases, the excessive loss of information is also a tricky problem. To address those problems, in this paper, we are trying to improve the network structure of Unet to make it more suitable for brain tumor segmentation. We propose a novel framework called Stack Multi-Connection Simple Reducing_Net(SMCSRNet) that are stacked by our basic blocks called Simple Reducing_Net(SRNet). The basic block SRNet is improved from the original Unet, which consists of four downsampling and upsampling operations during the encoding and decoding. Only one convolution operation is performed before each downsampling process. The operation of copy and crop is preserved between encoding and decoding. The main advantage of the SRNet is that the amount of parameters is reduced by 4/5 by comparing with the original Unet. Except for the problem of parameters number, we also proposed a series of bridge connections among the stacked cascade network to improve the loss of information. More specifically, some bridge connections will be adopted before the pooling operation in each layer during the downsampling process. It means that each layer in one basic block has a bridge connection with the same feature size from the previous basic block before pooling, and it is worth noting that the training time of the proposed framework is much less than the original stacked Unet. Moreover, the performance of the proposed method is also improved compared to the stacked Unet. When further comparing with other state-of-the-art segmentation networks, it can be found that the performance is as good as the most popular DenseNet or ResNet. Overall, by evaluating the proposed framework on the BRAT2015, it can be proven that the proposed segmentation network has the ability to accurately extract the brain tumor boundary so as to obtain higher recognition quality with high efficiency. |
| first_indexed | 2024-12-20T08:58:34Z |
| format | Article |
| id | doaj.art-d8c947d01f4f4c919c4270f1a8828d5e |
| institution | Directory Open Access Journal |
| issn | 2169-3536 |
| language | English |
| last_indexed | 2024-12-20T08:58:34Z |
| publishDate | 2019-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Access |
| spelling | doaj.art-d8c947d01f4f4c919c4270f1a8828d5e2022-12-21T19:45:56ZengIEEEIEEE Access2169-35362019-01-01710401110402410.1109/ACCESS.2019.29264488753510A Stacked Multi-Connection Simple Reducing Net for Brain Tumor SegmentationYi Ding0https://orcid.org/0000-0003-3406-9770Fujuan Chen1https://orcid.org/0000-0003-3391-379XYang Zhao2Zhixing Wu3Chao Zhang4Dongyuan Wu5School of Information and Software Engineering, University of Electronic Science and Technology of China (UESTC), Chengdu, ChinaSchool of Information and Software Engineering, University of Electronic Science and Technology of China (UESTC), Chengdu, ChinaSchool of Information and Software Engineering, University of Electronic Science and Technology of China (UESTC), Chengdu, ChinaSchool of Information and Software Engineering, University of Electronic Science and Technology of China (UESTC), Chengdu, ChinaSchool of Information and Software Engineering, University of Electronic Science and Technology of China (UESTC), Chengdu, ChinaSchool of Information and Software Engineering, University of Electronic Science and Technology of China (UESTC), Chengdu, ChinaIt is well known that the Unet has been widely used in the area of medical image segmentation because of the cascade connection in the up-sampling process. However, it does not perform well in dealing with complex medical images, such as brain MRI. In order to achieve better segmentation performance by adopting the Unet, many researchers have paid more attention to stacking the Unet. However, the stacking process leads to a large increase in the number of parameters. This is not a good choice when considering the tradeoff between precision and efficiency. Another problem is that as the depth of the network increases, the excessive loss of information is also a tricky problem. To address those problems, in this paper, we are trying to improve the network structure of Unet to make it more suitable for brain tumor segmentation. We propose a novel framework called Stack Multi-Connection Simple Reducing_Net(SMCSRNet) that are stacked by our basic blocks called Simple Reducing_Net(SRNet). The basic block SRNet is improved from the original Unet, which consists of four downsampling and upsampling operations during the encoding and decoding. Only one convolution operation is performed before each downsampling process. The operation of copy and crop is preserved between encoding and decoding. The main advantage of the SRNet is that the amount of parameters is reduced by 4/5 by comparing with the original Unet. Except for the problem of parameters number, we also proposed a series of bridge connections among the stacked cascade network to improve the loss of information. More specifically, some bridge connections will be adopted before the pooling operation in each layer during the downsampling process. It means that each layer in one basic block has a bridge connection with the same feature size from the previous basic block before pooling, and it is worth noting that the training time of the proposed framework is much less than the original stacked Unet. Moreover, the performance of the proposed method is also improved compared to the stacked Unet. When further comparing with other state-of-the-art segmentation networks, it can be found that the performance is as good as the most popular DenseNet or ResNet. Overall, by evaluating the proposed framework on the BRAT2015, it can be proven that the proposed segmentation network has the ability to accurately extract the brain tumor boundary so as to obtain higher recognition quality with high efficiency.https://ieeexplore.ieee.org/document/8753510/Semantic segmentationUnet; stacked Unetfeature fusionmedical image segmentationbrain tumor segmentationdeep convolutional neural networks |
| spellingShingle | Yi Ding Fujuan Chen Yang Zhao Zhixing Wu Chao Zhang Dongyuan Wu A Stacked Multi-Connection Simple Reducing Net for Brain Tumor Segmentation IEEE Access Semantic segmentation Unet; stacked Unet feature fusion medical image segmentation brain tumor segmentation deep convolutional neural networks |
| title | A Stacked Multi-Connection Simple Reducing Net for Brain Tumor Segmentation |
| title_full | A Stacked Multi-Connection Simple Reducing Net for Brain Tumor Segmentation |
| title_fullStr | A Stacked Multi-Connection Simple Reducing Net for Brain Tumor Segmentation |
| title_full_unstemmed | A Stacked Multi-Connection Simple Reducing Net for Brain Tumor Segmentation |
| title_short | A Stacked Multi-Connection Simple Reducing Net for Brain Tumor Segmentation |
| title_sort | stacked multi connection simple reducing net for brain tumor segmentation |
| topic | Semantic segmentation Unet; stacked Unet feature fusion medical image segmentation brain tumor segmentation deep convolutional neural networks |
| url | https://ieeexplore.ieee.org/document/8753510/ |
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