Search Results for author: Ross Whitaker

Found 12 papers, 1 papers with code

Matching aggregate posteriors in the variational autoencoder

no code implementations13 Nov 2023 Surojit Saha, Sarang Joshi, Ross Whitaker

However, the VAE's known failure to match the aggregate posterior often results in \emph{pockets/holes} in the latent distribution (i. e., a failure to match the prior) and/or \emph{posterior collapse}, which is associated with a loss of information in the latent space.

Leveraging Unsupervised Image Registration for Discovery of Landmark Shape Descriptor

1 code implementation13 Nov 2021 Riddhish Bhalodia, Shireen Elhabian, Ladislav Kavan, Ross Whitaker

We use landmark-driven image registration as the primary task to force the neural network to discover landmarks that register the images well.

Anatomy Dimensionality Reduction +4

DeepSSM: A Blueprint for Image-to-Shape Deep Learning Models

no code implementations14 Oct 2021 Riddhish Bhalodia, Shireen Elhabian, Jadie Adams, Wenzheng Tao, Ladislav Kavan, Ross Whitaker

Here, we propose DeepSSM, a deep learning-based framework for learning the functional mapping from images to low-dimensional shape descriptors and their associated shape representations, thereby inferring statistical representation of anatomy directly from 3D images.

Anatomy Data Augmentation

Self-Supervised Discovery of Anatomical Shape Landmarks

no code implementations13 Jun 2020 Riddhish Bhalodia, Ladislav Kavan, Ross Whitaker

In this paper, we present a complete framework, which only takes a set of input images and produces landmarks that are immediately usable for statistical shape analysis.

Image Registration

SetGAN: Improving the stability and diversity of generative models through a permutation invariant architecture

no code implementations28 Jun 2019 Alessandro Ferrero, Shireen Elhabian, Ross Whitaker

Generative adversarial networks (GANs) have proven effective in modeling distributions of high-dimensional data.

On the Evaluation and Validation of Off-the-shelf Statistical Shape Modeling Tools: A Clinical Application

no code implementations3 Oct 2018 Anupama Goparaju, Ibolya Csecs, Alan Morris, Evgueni Kholmovski, Nassir Marrouche, Ross Whitaker, Shireen Elhabian

Statistical shape modeling (SSM) has proven useful in many areas of biology and medicine as a new generation of morphometric approaches for the quantitative analysis of anatomical shapes.

Anatomy

Deep Learning for End-to-End Atrial Fibrillation Recurrence Estimation

no code implementations30 Sep 2018 Riddhish Bhalodia, Anupama Goparaju, Tim Sodergren, Alan Morris, Evgueni Kholmovski, Nassir Marrouche, Joshua Cates, Ross Whitaker, Shireen Elhabian

In this paper, we propose a machine learning approach that uses deep networks to estimate AF recurrence by predicting shape descriptors directly from MRI images, with NO image pre-processing involved.

Anatomy Atrial Fibrillation Recurrence Estimation +4

ShapeOdds: Variational Bayesian Learning of Generative Shape Models

no code implementations CVPR 2017 Shireen Elhabian, Ross Whitaker

Learning generative shape models from grid-structured representations, aka silhouettes, is usually hindered by (1) data likelihoods with intractable marginals and posteriors, (2) high-dimensional shape spaces with limited training samples (and the associated risk of overfitting), and (3) estimation of hyperparameters relating to model complexity that often entails computationally expensive grid searches.

Image Segmentation object-detection +2

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