Search Results for author: Lei Xing

Found 43 papers, 13 papers with code

An Alternative Method to Identify the Susceptibility Threshold Level of Device under Test in a Reverberation Chamber

no code implementations23 Apr 2024 Qian Xu, Kai Chen, Xueqi Shen, Lei Xing, Yi Huang, Tian Hong Loh

By counting the number of pass/fail occurrences of a DUT (Device under Test) in the stirring process in a reverberation chamber (RC), the threshold electric field (E-field) level can be well estimated without tuning the input power and repeating the whole testing many times.

In-context Vectors: Making In Context Learning More Effective and Controllable Through Latent Space Steering

1 code implementation11 Nov 2023 Sheng Liu, Haotian Ye, Lei Xing, James Zou

On a new query, instead of adding demonstrations to the prompt, we shift the latent states of the LLM using the ICV.

In-Context Learning Style Transfer

3D TransUNet: Advancing Medical Image Segmentation through Vision Transformers

3 code implementations11 Oct 2023 Jieneng Chen, Jieru Mei, Xianhang Li, Yongyi Lu, Qihang Yu, Qingyue Wei, Xiangde Luo, Yutong Xie, Ehsan Adeli, Yan Wang, Matthew Lungren, Lei Xing, Le Lu, Alan Yuille, Yuyin Zhou

In this paper, we extend the 2D TransUNet architecture to a 3D network by building upon the state-of-the-art nnU-Net architecture, and fully exploring Transformers' potential in both the encoder and decoder design.

Image Segmentation Medical Image Segmentation +3

Development and external validation of a lung cancer risk estimation tool using gradient-boosting

1 code implementation23 Aug 2023 Pierre-Louis Benveniste, Julie Alberge, Lei Xing, Jean-Emmanuel Bibault

In this study, we propose a machine learning (ML) tool trained on data from the PLCO Cancer Screening Trial and validated on the NLST to estimate the likelihood of lung cancer occurrence within five years.

Ensemble Learning feature selection

Consistency-guided Meta-Learning for Bootstrapping Semi-Supervised Medical Image Segmentation

1 code implementation21 Jul 2023 Qingyue Wei, Lequan Yu, Xianhang Li, Wei Shao, Cihang Xie, Lei Xing, Yuyin Zhou

Specifically, our approach first involves training a segmentation model on a small set of clean labeled images to generate initial labels for unlabeled data.

Image Segmentation Meta-Learning +4

Learning Image Representations for Content Based Image Retrieval of Radiotherapy Treatment Plans

no code implementations6 Jun 2022 Charles Huang, Varun Vasudevan, Oscar Pastor-Serrano, Md Tauhidul Islam, Yusuke Nomura, Piotr Dubrowski, Jen-Yeu Wang, Joseph B. Schulz, Yong Yang, Lei Xing

To address these limitations, we propose a content based image retrieval (CBIR) method for retrieving dose distributions of previously planned patients based on anatomical similarity.

Content-Based Image Retrieval Retrieval

Label-Efficient Self-Supervised Federated Learning for Tackling Data Heterogeneity in Medical Imaging

1 code implementation17 May 2022 Rui Yan, Liangqiong Qu, Qingyue Wei, Shih-Cheng Huang, Liyue Shen, Daniel Rubin, Lei Xing, Yuyin Zhou

The collection and curation of large-scale medical datasets from multiple institutions is essential for training accurate deep learning models, but privacy concerns often hinder data sharing.

Federated Learning Privacy Preserving +2

L2B: Learning to Bootstrap Robust Models for Combating Label Noise

1 code implementation9 Feb 2022 Yuyin Zhou, Xianhang Li, Fengze Liu, Qingyue Wei, Xuxi Chen, Lequan Yu, Cihang Xie, Matthew P. Lungren, Lei Xing

Extensive experiments demonstrate that our method effectively mitigates the challenges of noisy labels, often necessitating few to no validation samples, and is well generalized to other tasks such as image segmentation.

Ranked #8 on Image Classification on Clothing1M (using clean data) (using extra training data)

Image Segmentation Learning with noisy labels +3

Image Classification using Graph Neural Network and Multiscale Wavelet Superpixels

no code implementations29 Jan 2022 Varun Vasudevan, Maxime Bassenne, Md Tauhidul Islam, Lei Xing

On the contrary, this study investigates image classification using graphs generated from an image-specific number of multiscale superpixels.

Graph Classification Image Classification +1

SSDL: Self-Supervised Dictionary Learning

no code implementations3 Dec 2021 Shuai Shao, Lei Xing, Wei Yu, Rui Xu, Yanjiang Wang, BaoDi Liu

Inspired by the concept of self-supervised learning (e. g., setting the pretext task to generate a universal model for the downstream task), we propose a Self-Supervised Dictionary Learning (SSDL) framework to address this challenge.

Dictionary Learning Human Activity Recognition +1

MDFM: Multi-Decision Fusing Model for Few-Shot Learning

no code implementations1 Dec 2021 Shuai Shao, Lei Xing, Rui Xu, Weifeng Liu, Yan-Jiang Wang, Bao-Di Liu

Inspired by this assumption, we propose a novel method Multi-Decision Fusing Model (MDFM), which comprehensively considers the decisions based on multiple FEMs to enhance the efficacy and robustness of the model.

Few-Shot Learning

RadFusion: Benchmarking Performance and Fairness for Multimodal Pulmonary Embolism Detection from CT and EHR

no code implementations23 Nov 2021 Yuyin Zhou, Shih-Cheng Huang, Jason Alan Fries, Alaa Youssef, Timothy J. Amrhein, Marcello Chang, Imon Banerjee, Daniel Rubin, Lei Xing, Nigam Shah, Matthew P. Lungren

Despite the routine use of electronic health record (EHR) data by radiologists to contextualize clinical history and inform image interpretation, the majority of deep learning architectures for medical imaging are unimodal, i. e., they only learn features from pixel-level information.

Benchmarking Computed Tomography (CT) +2

Solving Inverse Problems in Medical Imaging with Score-Based Generative Models

1 code implementation NeurIPS Workshop Deep_Invers 2021 Yang song, Liyue Shen, Lei Xing, Stefano Ermon

These measurements are typically synthesized from images using a fixed physical model of the measurement process, which hinders the generalization capability of models to unknown measurement processes.

Computed Tomography (CT)

Metal Artifact Reduction in 2D CT Images with Self-supervised Cross-domain Learning

no code implementations28 Sep 2021 Lequan Yu, Zhicheng Zhang, Xiaomeng Li, Hongyi Ren, Wei Zhao, Lei Xing

We then design a novel FBP reconstruction loss to encourage the network to generate more perfect completion results and a residual-learning-based image refinement module to reduce the secondary artifacts in the reconstructed CT images.

Image Reconstruction Metal Artifact Reduction

CIM: Class-Irrelevant Mapping for Few-Shot Classification

no code implementations7 Sep 2021 Shuai Shao, Lei Xing, Yixin Chen, Yan-Jiang Wang, Bao-Di Liu, Yicong Zhou

(2) Use the FEM to extract the features of novel data (with few labeled samples and totally different categories from base data), then classify them with the to-be-designed classifier.

Classification Dictionary Learning +1

NeRP: Implicit Neural Representation Learning with Prior Embedding for Sparsely Sampled Image Reconstruction

1 code implementation NeurIPS Workshop Deep_Invers 2021 Liyue Shen, John Pauly, Lei Xing

The method differs fundamentally from previous deep learning-based image reconstruction approaches in that NeRP exploits the internal information in an image prior, and the physics of the sparsely sampled measurements to produce a representation of the unknown subject.

Image Reconstruction Representation Learning

A Geometry-Informed Deep Learning Framework for Ultra-Sparse 3D Tomographic Image Reconstruction

no code implementations25 May 2021 Liyue Shen, Wei Zhao, Dante Capaldi, John Pauly, Lei Xing

Deep learning affords enormous opportunities to augment the armamentarium of biomedical imaging, albeit its design and implementation have potential flaws.

Image Reconstruction

CateNorm: Categorical Normalization for Robust Medical Image Segmentation

1 code implementation29 Mar 2021 Junfei Xiao, Lequan Yu, Zongwei Zhou, Yutong Bai, Lei Xing, Alan Yuille, Yuyin Zhou

We propose a new normalization strategy, named categorical normalization (CateNorm), to normalize the activations according to categorical statistics.

Image Segmentation Medical Image Segmentation +2

TransCT: Dual-path Transformer for Low Dose Computed Tomography

1 code implementation28 Feb 2021 Zhicheng Zhang, Lequan Yu, Xiaokun Liang, Wei Zhao, Lei Xing

Low dose computed tomography (LDCT) has attracted more and more attention in routine clinical diagnosis assessment, therapy planning, etc., which can reduce the dose of X-ray radiation to patients.

Learning from multiscale wavelet superpixels using GNN with spatially heterogeneous pooling

no code implementations1 Jan 2021 Maxime Bassenne, Varun Vasudevan, Lei Xing

In this study, we investigate learning from a new principled representation in which individual images are represented by an image-specific number of multiscale superpixels.

General Classification Graph Classification +2

Region-specific Dictionary Learning-based Low-dose Thoracic CT Reconstruction

no code implementations20 Oct 2020 Qiong Xu, Jeff Wang, Hiroki Shirato, Lei Xing

Parameters for dictionary learning and sparse representation are determined according to the structural and noise properties of each region.

Dictionary Learning Image Reconstruction +1

Deep Sinogram Completion with Image Prior for Metal Artifact Reduction in CT Images

no code implementations16 Sep 2020 Lequan Yu, Zhicheng Zhang, Xiaomeng Li, Lei Xing

Computed tomography (CT) has been widely used for medical diagnosis, assessment, and therapy planning and guidance.

Computed Tomography (CT) Image Generation +2

Self-supervised Feature Learning via Exploiting Multi-modal Data for Retinal Disease Diagnosis

1 code implementation21 Jul 2020 Xiaomeng Li, Mengyu Jia, Md Tauhidul Islam, Lequan Yu, Lei Xing

The automatic diagnosis of various retinal diseases from fundus images is important to support clinical decision-making.

Decision Making

Multi-Domain Image Completion for Random Missing Input Data

no code implementations10 Jul 2020 Liyue Shen, Wentao Zhu, Xiaosong Wang, Lei Xing, John M. Pauly, Baris Turkbey, Stephanie Anne Harmon, Thomas Hogue Sanford, Sherif Mehralivand, Peter Choyke, Bradford Wood, Daguang Xu

Multi-domain data are widely leveraged in vision applications taking advantage of complementary information from different modalities, e. g., brain tumor segmentation from multi-parametric magnetic resonance imaging (MRI).

Brain Tumor Segmentation Disentanglement +3

A Mean-Field Theory for Learning the Schönberg Measure of Radial Basis Functions

no code implementations23 Jun 2020 Masoud Badiei Khuzani, Yinyu Ye, Sandy Napel, Lei Xing

In particular, we prove that in the scaling limits, the empirical measure of the Langevin particles converges to the law of a reflected It\^{o} diffusion-drift process.

Clustering Image Retrieval +3

Atlas Based Segmentations via Semi-Supervised Diffeomorphic Registrations

no code implementations23 Nov 2019 Charles Huang, Masoud Badiei, Hyunseok Seo, Ming Ma, Xiaokun Liang, Dante Capaldi, Michael Gensheimer, Lei Xing

Whereas supervised segmentation methods only automate the segmentation process for a select few number of OARs, we demonstrate that our methods can achieve similar performance for OARs of interest, while also providing segmentations for every other OAR on the provided atlas.

Segmentation

Modified U-Net (mU-Net) with Incorporation of Object-Dependent High Level Features for Improved Liver and Liver-Tumor Segmentation in CT Images

no code implementations31 Oct 2019 Hyunseok Seo, Charles Huang, Maxime Bassenne, Ruoxiu Xiao, Lei Xing

To cope with these problems, we added a residual path with deconvolution and activation operations to the skip connection of the U-Net to avoid duplication of low resolution information of features.

Object Segmentation +1

A Mean-Field Theory for Kernel Alignment with Random Features in Generative Adverserial Networks

no code implementations25 Sep 2019 Masoud Badiei Khuzani, Liyue Shen, Shahin Shahrampour, Lei Xing

We subsequently leverage a particle stochastic gradient descent (SGD) method to solve finite dimensional optimization problems.

A Mean-Field Theory for Kernel Alignment with Random Features in Generative and Discriminative Models

no code implementations25 Sep 2019 Masoud Badiei Khuzani, Liyue Shen, Shahin Shahrampour, Lei Xing

We subsequently leverage a particle stochastic gradient descent (SGD) method to solve the derived finite dimensional optimization problem.

Two-sample testing

Difficulty-aware Meta-learning for Rare Disease Diagnosis

no code implementations30 Jun 2019 Xiaomeng Li, Lequan Yu, Yueming Jin, Chi-Wing Fu, Lei Xing, Pheng-Ann Heng

Rare diseases have extremely low-data regimes, unlike common diseases with large amount of available labeled data.

General Classification Lesion Classification +2

On Sample Complexity of Projection-Free Primal-Dual Methods for Learning Mixture Policies in Markov Decision Processes

no code implementations15 Mar 2019 Masoud Badiei Khuzani, Varun Vasudevan, Hongyi Ren, Lei Xing

We compute the actions of a policy that is nearly as good as a policy chosen by a suitable oracle from a given mixture policy class characterized by the convex hull of a set of known base policies.

Transformation Consistent Self-ensembling Model for Semi-supervised Medical Image Segmentation

no code implementations28 Feb 2019 Xiaomeng Li, Lequan Yu, Hao Chen, Chi-Wing Fu, Lei Xing, Pheng-Ann Heng

In this paper, we present a novel semi-supervised method for medical image segmentation, where the network is optimized by the weighted combination of a common supervised loss for labeled inputs only and a regularization loss for both labeled and unlabeled data.

Image Segmentation Lesion Segmentation +6

A Distributionally Robust Optimization Method for Adversarial Multiple Kernel Learning

no code implementations27 Feb 2019 Masoud Badiei Khuzani, Hongyi Ren, Md Tauhidul Islam, Lei Xing

Specifically, we consider a distributionally robust optimization of the kernel-target alignment with respect to the distribution of training samples over a distributional ball defined by the Kullback-Leibler (KL) divergence.

Generalization Bounds Model Selection +2

Quantized Minimum Error Entropy Criterion

no code implementations11 Oct 2017 Badong Chen, Lei Xing, Nanning Zheng, Jose C. Príncipe

Comparing with traditional learning criteria, such as mean square error (MSE), the minimum error entropy (MEE) criterion is superior in nonlinear and non-Gaussian signal processing and machine learning.

Quantization

Deep Generative Adversarial Networks for Compressed Sensing Automates MRI

2 code implementations31 May 2017 Morteza Mardani, Enhao Gong, Joseph Y. Cheng, Shreyas Vasanawala, Greg Zaharchuk, Marcus Alley, Neil Thakur, Song Han, William Dally, John M. Pauly, Lei Xing

A multilayer convolutional neural network is then jointly trained based on diagnostic quality images to discriminate the projection quality.

MRI Reconstruction

Robustness of Maximum Correntropy Estimation Against Large Outliers

no code implementations23 Mar 2017 Badong Chen, Lei Xing, Haiquan Zhao, Bin Xu, Jose C. Principe

The maximum correntropy criterion (MCC) has recently been successfully applied in robust regression, classification and adaptive filtering, where the correntropy is maximized instead of minimizing the well-known mean square error (MSE) to improve the robustness with respect to outliers (or impulsive noises).

Robust Learning with Kernel Mean p-Power Error Loss

no code implementations21 Dec 2016 Badong Chen, Lei Xing, Xin Wang, Jing Qin, Nanning Zheng

Correntropy is a second order statistical measure in kernel space, which has been successfully applied in robust learning and signal processing.

Kernel Risk-Sensitive Loss: Definition, Properties and Application to Robust Adaptive Filtering

no code implementations1 Aug 2016 Badong Chen, Lei Xing, Bin Xu, Haiquan Zhao, Nanning Zheng, Jose C. Principe

Nonlinear similarity measures defined in kernel space, such as correntropy, can extract higher-order statistics of data and offer potentially significant performance improvement over their linear counterparts especially in non-Gaussian signal processing and machine learning.

Generalized Correntropy for Robust Adaptive Filtering

no code implementations12 Apr 2015 Badong Chen, Lei Xing, Haiquan Zhao, Nanning Zheng, José C. Príncipe

In this work, we propose a generalized correntropy that adopts the generalized Gaussian density (GGD) function as the kernel (not necessarily a Mercer kernel), and present some important properties.

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