58 research outputs found
ViT-DAE: Transformer-driven Diffusion Autoencoder for Histopathology Image Analysis
Generative AI has received substantial attention in recent years due to its
ability to synthesize data that closely resembles the original data source.
While Generative Adversarial Networks (GANs) have provided innovative
approaches for histopathological image analysis, they suffer from limitations
such as mode collapse and overfitting in discriminator. Recently, Denoising
Diffusion models have demonstrated promising results in computer vision. These
models exhibit superior stability during training, better distribution
coverage, and produce high-quality diverse images. Additionally, they display a
high degree of resilience to noise and perturbations, making them well-suited
for use in digital pathology, where images commonly contain artifacts and
exhibit significant variations in staining. In this paper, we present a novel
approach, namely ViT-DAE, which integrates vision transformers (ViT) and
diffusion autoencoders for high-quality histopathology image synthesis. This
marks the first time that ViT has been introduced to diffusion autoencoders in
computational pathology, allowing the model to better capture the complex and
intricate details of histopathology images. We demonstrate the effectiveness of
ViT-DAE on three publicly available datasets. Our approach outperforms recent
GAN-based and vanilla DAE methods in generating realistic images.Comment: Submitted to MICCAI 202
fMRI in patients with lumbar disc disease: a paradigm to study patients over time
Low back pain is a common human ailment. It is estimated that over 70% of the population will experience low back pain that will require medication and/or medical attention. There are many causes for low back pain, one being herniation of the discs of the lumbar spine. Treatment options are very limited. Why patients develop chronic pain especially when there is no known organic cause or when the offending painful stimulus has been removed remains poorly understood. Functional magnetic resonance imaging (fMRI) is a technique that allows researchers to image which regions of the brain that are activated during motor, cognitive, and sensory experiences. Using fMRI to study pain has revealed new information about how the brain responds to painful stimuli and what regions of the brain are activated during pain. However, many of the paradigms used do not replicate the subject’s pain or use painful stimuli in volunteers without pain. Also, following patients from their acute phase of pain to the chronic phase with serial fMRI has not been performed. In this study we developed a paradigm that would allow studying patients with low back pain and leg pain including lumbar radiculopathy to better mimic a clinical pain syndrome and to have a method of following patients with this type of pain over time
Topology-Guided Multi-Class Cell Context Generation for Digital Pathology
In digital pathology, the spatial context of cells is important for cell
classification, cancer diagnosis and prognosis. To model such complex cell
context, however, is challenging. Cells form different mixtures, lineages,
clusters and holes. To model such structural patterns in a learnable fashion,
we introduce several mathematical tools from spatial statistics and topological
data analysis. We incorporate such structural descriptors into a deep
generative model as both conditional inputs and a differentiable loss. This
way, we are able to generate high quality multi-class cell layouts for the
first time. We show that the topology-rich cell layouts can be used for data
augmentation and improve the performance of downstream tasks such as cell
classification.Comment: To be published in proceedings of the IEEE/CVF Conference on Computer
Vision and Pattern Recognition (CVPR) 202
Halcyon -- A Pathology Imaging and Feature analysis and Management System
Halcyon is a new pathology imaging analysis and feature management system
based on W3C linked-data open standards and is designed to scale to support the
needs for the voluminous production of features from deep-learning feature
pipelines. Halcyon can support multiple users with a web-based UX with access
to all user data over a standards-based web API allowing for integration with
other processes and software systems. Identity management and data security is
also provided.Comment: 15 pages, 11 figures. arXiv admin note: text overlap with
arXiv:2005.0646
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