Improved object classification with voxel-based models.
problem Challenges in three-dimensional data representation.
method Voxel-based variational autoencoders, deep CNN for classification.
result 51.5% relative improvement in object classification.
Paper presents voxel graph operators for vector data models.
problem Efficient conversion and analysis of geometric models.
method Topological voxelization, graph construction, differential operator derivation.
result Discrete differential and integral operators from voxel complexes.
Proposes a multi-level learning approach for 3D object recognition.
problem Improving 3D object recognition accuracy through multi-scale spatial features.
method End-to-end multi-level learning on a multi-level voxel grid.
result Comparable object recognition performance with lower memory usage.
Differentiable voxelization for 3D meshes with GPU acceleration.
problem Efficient and accurate voxelization of 3D meshes.
method Differentiable voxelization using winding number and solid angles, with GPU acceleration and neural network deformation.
result State-of-the-art performance in accuracy and efficiency on the ShapeNet dataset.
Voxel-FPN detects 3D objects from point clouds using raw LIDAR data.
problem 3D object detection in point cloud data for autonomous driving.
method Bottom-up voxel extraction and top-down feature fusion.
result Voxel-FPN outperforms baselines on the KITTI-3D benchmark.
3D neural network models atomistic potentials in complex alloys.
problem Designing robust atomistic potentials for complex alloys is computationally expensive and time-consuming.
method Voxelized atomic configurations and 3D convolutional neural networks to learn atomic interactions.
result 3D convolutional neural networks effectively model atomistic potentials in complex alloys.
Proposes a multi-resolution model for prostate cancer classification using mpMRI.
problem Improving voxel-wise classification of prostate cancer using multi-parametric MRI data.
method Multi-resolution Super Learner framework combining local base learners at multiple resolutions and spatial Gaussian kernel smoothing.
result Enhanced voxel-wise classification of prostate cancer status and clinical significance.
Deep learning estimates dose voxel kernels from CT data for personalized dosimetry.
problem Accurate estimation of absorbed dose in personalized radionuclide therapy.
method Combining deep learning with CT data to approximate dose voxel kernels from density kernels.
result Deep learning achieved an intersection-over-union score of 0.86 and mean squared error of 1.24×10−4 on real patient data.
In many human brain network studies, we do not have sufficient number (n) of images relative to the number (p) of voxels due to the prohibitively expensive cost of scanning enough subjects. Thus, brain network models usually suffer the small-n large-p problem. Such a problem is often remedied by sparse network models, …
DeepFDR uses deep learning for better FDR control in neuroimaging data.
problem Spatial dependence among voxel-based tests in neuroimaging data.
method DeepFDR leverages unsupervised deep learning-based image segmentation.
result DeepFDR outperforms existing methods in FDR control and computational efficiency.
In this paper, we consider voxel selection for functional Magnetic Resonance Imaging (fMRI) brain data with the aim of finding a more complete set of probably correlated discriminative voxels, thus improving interpretation of the discovered potential biomarkers. The main difficulty in doing this is an extremely high di…
Tab2vox converts tabular data into 3D images for improved demand forecasting.
problem Forecasting demand influenced by multi-level causes and large volatility.
method Tab2vox neural architecture search (NAS) model to convert tabular data into 3D voxel images for 3D CNN forecasting.
result 3D CNN forecasting model outperforms existing tabular data techniques.
A relatively recent advance in cognitive neuroscience has been multi-voxel pattern analysis (MVPA), which enables researchers to decode brain states and/or the type of information represented in the brain during a cognitive operation. MVPA methods utilize machine learning algorithms to distinguish among types of inform…
Improved fMRI activation detection for single-subject studies.
problem Challenges in detecting activation in low-signal fMRI studies.
method Model-based approach using MixfMRI R package.
result Reliable activation detection in single-subject fMRI studies.
We propose a globally convergent alternating minimization (AM) algorithm for image reconstruction in transmission tomography, which extends automatic relevance determination (ARD) to Poisson noise models with Beer's law. The algorithm promotes solutions that are sparse in the pixel/voxel-differences domain by introduci…
fMRI analysis classifies autobiographical memory valence across individuals.
problem Classifying valence of autobiographical memories across different participants.
method Feature selection (ReliefF) combined with boosting methods applied to voxel space data.
result Classification accuracy of 62% in cross-participant setting, significantly higher than previous results.
New MRI method maps tissue parameters more accurately by ignoring voxel independence.
problem Voxel independence assumption limits model fitting reliability and repeatability.
method Self-supervised deep variational approach with Gaussian mixture prior.
result Our method outperforms current techniques in dMRI simulations and real data.
MRI method predicts glioma features, survival, and endothelial proliferation.
problem Invasive biopsy limits detection of glioma features due to tumor heterogeneity.
method Voxel-wise, multiparametric MRI radiomics with k-NN classifier.
result Model accurately predicts disease compositions, survival, and endothelial proliferation.
CubeNet preserves 3D shape signatures through equivariance.
problem 3D ConvNets fail to capture pose differences.
method Group Convolutional Neural Network with linear equivariance to 3D transformations.
result Achieves state-of-the-art on ModelNet10 classification.
3D-CNN learns local geometric features for manufacturability analysis of drilled holes.
problem Capturing distinguishing local features in 3D CAD geometry.
method 3D-CNN with voxel data augmented by surface normals, using 3D gradient-weighted class activation maps.
result Identification of local features critical for manufacturability analysis.
Traditional voxel-level multiple testing procedures in neuroimaging, mostly p-value based, often ignore the spatial correlations among neighboring voxels and thus suffer from substantial loss of power. We extend the local-significance-index based procedure originally developed for the hidden Markov chain models, whic…
Partial soft-matching distance improves neural representation comparison by allowing some neurons to remain unmatched.
problem Neural representations are noisy and contain outliers, making traditional matching methods unreliable.
method Extends soft-matching distance to a partial optimal transport setting, allowing some neurons to remain unmatched.
result Partial soft-matching provides robust correspondences that are more reliable under noise and outliers.
New method reduces dMRI scan times by achieving sparser representations.
problem Accelerate dMRI reconstruction while maintaining high resolution.
method Joint spatial-angular sparse coding with separable dictionaries.
result Significantly sparser representations of HARDI achieved.
A new method for brain tissue segmentation across medical centers using a smoothness prior.
problem Tissue segmentation challenges due to center-specific acquisition protocols.
method Developed a smoothness prior that is fit to segmentations from another medical center, integrated into an unsupervised Bayesian model.
result Segmentations are similarly smooth across centers, improving generalization.
We present a novel approach to automatically segment magnetic resonance (MR) images of the human brain into anatomical regions. Our methodology is based on a deep artificial neural network that assigns each voxel in an MR image of the brain to its corresponding anatomical region. The inputs of the network capture infor…
Estimates localized complexity of white-matter wiring using GANs.
problem Complexity of white-matter wiring, especially in ambiguous regions, confounds analysis.
method Bayesian estimate of heteroscedastic aleatoric uncertainty through image inpainting.
result Localized wiring complexity quantified, directly reflecting difficulty of lesion inpainting.
3D CNNs interpret brain MRI differences between men and women.
problem Interpreting 3D CNNs for voxel-wise brain MRI analysis.
method Three interpretation methods: Meaningful Perturbations, Grad CAM, and Guided Backpropagation.
result Voxel-wise 3D CNN interpretation of brain MRI data.
Visualizes ConvNets without confounding effects.
problem Misinterpretation of saliency maps due to confounding variables.
method Univariate statistical tests and partial back-propagation to remove confounding effects.
result Visualization of confounder-free saliency maps.
fcHMRF-LIS controls FDR in neuroimaging data, improving power and scalability.
problem Complex spatial dependencies and high variability in FDR control methods for neuroimaging data.
method fcHMRF-LIS integrates LIS-based testing with fcHMRF to model spatial structures efficiently.
result fcHMRF-LIS achieves accurate FDR control, lower FNR, and higher true positives compared to existing methods.
Functional magnetic resonance imaging (fMRI) produces data about activity inside the brain, from which spatial maps can be extracted by independent component analysis (ICA). In datasets, there are n spatial maps that contain p voxels. The number of voxels is very high compared to the number of analyzed spatial maps. Cl…
PERK speeds up MRI parameter estimation without needing a dictionary.
problem Efficiently estimating MRI parameters without a dictionary.
method Regression with kernels using prior distributions and nonlinear MR signal model.
result PERK is at least 23 times faster than grid search for T1,T2 estimation. Fine-grained atlases improve fMRI analysis of brain activity.
problem Large fMRI datasets require scalable brain network summaries.
method Trained on millions of fMRI volumes, DiFuMo dictionaries of 64-1024 networks.
result Fine-grained atlases enhance classic fMRI analysis pipelines.
Novel model for decoding visual stimuli in human brains.
problem Challenges in MVP techniques, including noise and sparsity, and the cost of brain studies.
method Automatic detection of active regions, new Gaussian smoothing method, combining fMRI data sets.
result Superior performance compared to state-of-the-art methods.
RapidPT accelerates permutation testing in neuroimaging by reducing runtime.
problem Significant computational burden in voxel-wise analysis.
method Exploits low-rank structure of permutation testing matrix for efficient recovery.
result Achieves substantial speedups (1.5x - 1000x) over existing methods.
Typical cohorts in brain imaging studies are not large enough for systematic testing of all the information contained in the images. To build testable working hypotheses, investigators thus rely on analysis of previous work, sometimes formalized in a so-called meta-analysis. In brain imaging, this approach underlies th…
3D-CNN method visualizes localized geometric features for manufacturability analysis.
problem Interpreting 3D-CNN decisions for complex geometries.
method 3D-CNN with surface normals, 3D-GradCAM for feature visualization.
result Identifies critical local features for manufacturability.
We propose a novel method to embed a functional magnetic resonance imaging (fMRI) dataset in a low-dimensional space. The embedding optimally preserves the local functional coupling between fMRI time series and provides a low-dimensional coordinate system for detecting activated voxels. To compute the embedding, we bui…
Tool models nonlinear brain changes across Alzheimer's spectrum.
problem Limited GLM methods for nonlinear neuroimaging analysis.
method Voxelwise nonlinear regression for brain atrophy modeling.
result Distinct nonlinear brain atrophy patterns in Alzheimer's disease.
A new framework for brain mapping using statistical agnostic methods.
problem Estimating brain connectivity with limited data and controlling false positives.
method Statistical Agnostic Mapping (SAM) based on concentration inequalities.
result Relieves instability and provides less conservative p-value correction.
A new probabilistic model for PET image reconstruction.
problem Conventional PET image reconstruction ignores uncertainty in TACs.
method Probabilistic Graphical Modeling (PGM) with gradient-based iterative algorithm.
result Incorporates uncertainty in TACs, improving image reconstruction.
Unified framework for medical image segmentation using active and semi-supervised learning.
problem Training medical image segmentation models with limited annotated data.
method RegAL, a unified active semi-supervised framework that optimizes sample acquisition and unlabeled data utilization.
result RegAL consistently outperforms state-of-the-art methods across various datasets and metrics under extreme annotation scarcity.
A novel topological method analyzes fMRI data over time.
problem Analyzing time-varying fMRI data due to noise and person-to-person variation.
method Encoding each time point as a persistence diagram of topological features.
result Time-varying persistence diagrams can cluster participants and study brain state trajectories.
Functional Magnetic Resonance Imaging (fMRI) provides dynamical access into the complex functioning of the human brain, detailing the hemodynamic activity of thousands of voxels during hundreds of sequential time points. One approach towards illuminating the connection between fMRI and cognitive function is through dec…
Unified fMRI analysis methods using matrix-normal models.
problem Combining and improving fMRI analysis methods.
method Unified matrix-variate normal (MN) formalism for fMRI analysis.
result Unified methods show improved performance and flexibility.
Improved fMRI analysis models enhance classification performance and select relevant brain regions.
problem Inaccurate selection of relevant brain components in MVPA models.
method Hybrid Sparsity-Ranked LASSO (JSRL) method integrating component-level and voxel-level activity.
result JSRL models achieve up to 51.7% improvement in cross-validated deviance R2 and 7.3% improvement in cross-validated AUC. Real-time machine learning predicts AM process temperatures accurately.
problem Accurate prediction of temperature profiles in AM processes for cost-effective design.
method Ensemble of bagged decision trees (extremely randomized trees) for iterative temperature prediction.
result Mean absolute percentage errors below 1% for temperature profile predictions.
A new method increases 3D medical image segmentation accuracy and speed.
problem Training large 3D medical images on GPUs with limited memory.
method Data-swapping method to enlarge GPU memory and avoid patching.
result Improved segmentation accuracy and speed for full-size images.
Social-sparsity brain decoders improve speed and interpretability.
problem Computational cost and interpretability in brain decoding models.
method Introduced social-sparsity, a structured shrinkage operator.
result Social-sparsity performs almost as well as total-variation models and better than graph-net, with a fraction of the computational cost.