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Improving Lung Nodule Detection with Learnable Non-Maximum Suppression
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Improving Lung Nodule Detection with Learnable Non-Maximum Suppression
Current lung nodule detection methods generate several candidate regions per nodule, such that a Non-Maximum Suppression (NMS) algorithm is required to select a single region per nodule while eliminating the redundant ones. GossipNet is a 1D Neural Network (NN) for NMS, which can learn the NMS parameters rather than relying on handcrafted ones. However, GossipNet does not take advantage of image features to learn NMS. We use Faster R-CNN with ResNet18 for candidate region detection and present FeatureNMS --- a neural network that provides additional image features to the input of GossipNet, which result from a transformation over the voxel intensities of each candidate region in the CT image. Experiments indicate that FeatureNMS can improve nodule detection in 2.33% and 0.91%, on average, when compared to traditional NMS and the original GossipNet, respectively.
Current lung nodule detection methods generate several candidate regions per nodule, such that a Non-Maximum Suppression (NMS) algorithm is required to select a single region per nodule while eliminating the redundant ones. GossipNet is a 1D Neural Network (NN) for NMS, which can learn the NMS parameters rather than relying on handcrafted ones. However, GossipNet does not take advantage of image features to learn NMS. We use Faster R-CNN with ResNet18 for candidate region detection and present FeatureNMS --- a neural network that provides additional image features to the input of GossipNet, which result from a transformation over the voxel intensities of each candidate region in the CT image. Experiments indicate that FeatureNMS can improve nodule detection in 2.33% and 0.91%, on average, when compared to traditional NMS and the original GossipNet, respectively.