Search Results for author: Jiahong Ouyang

Found 10 papers, 4 papers with code

Towards General Purpose Vision Foundation Models for Medical Image Analysis: An Experimental Study of DINOv2 on Radiology Benchmarks

2 code implementations4 Dec 2023 Mohammed Baharoon, Waseem Qureshi, Jiahong Ouyang, Yanwu Xu, Abdulrhman Aljouie, Wei Peng

To measure the effectiveness and generalizability of DINOv2's feature representations, we analyze the model across medical image analysis tasks including disease classification and organ segmentation on both 2D and 3D images, and under different settings like kNN, few-shot learning, linear-probing, end-to-end fine-tuning, and parameter-efficient fine-tuning.

Few-Shot Learning Organ Segmentation +1

Metadata-Conditioned Generative Models to Synthesize Anatomically-Plausible 3D Brain MRIs

no code implementations7 Oct 2023 Wei Peng, Tomas Bosschieter, Jiahong Ouyang, Robert Paul, Ehsan Adeli, Qingyu Zhao, Kilian M. Pohl

Generative AI models hold great potential in creating synthetic brain MRIs that advance neuroimaging studies by, for example, enriching data diversity.

Self-Supervised Longitudinal Neighbourhood Embedding

1 code implementation5 Mar 2021 Jiahong Ouyang, Qingyu Zhao, Ehsan Adeli, Edith V Sullivan, Adolf Pfefferbaum, Greg Zaharchuk, Kilian M Pohl

Longitudinal MRIs are often used to capture the gradual deterioration of brain structure and function caused by aging or neurological diseases.

Contrastive Learning Representation Learning

Representation Disentanglement for Multi-modal brain MR Analysis

1 code implementation23 Feb 2021 Jiahong Ouyang, Ehsan Adeli, Kilian M. Pohl, Qingyu Zhao, Greg Zaharchuk

To address this issue, we propose a margin loss that regularizes the similarity in relationships of the representations across subjects and modalities.

Brain Tumor Segmentation Disentanglement +1

Accurate Tissue Interface Segmentation via Adversarial Pre-Segmentation of Anterior Segment OCT Images

no code implementations7 May 2019 Jiahong Ouyang, Tejas Sudharshan Mathai, Kira Lathrop, John Galeotti

To the best of our knowledge, this is the first approach to remove severe specular artifacts and speckle noise patterns (prior to the shallowest interface) that affects the interpretation of anterior segment OCT datasets, thereby resulting in the accurate segmentation of the shallowest tissue interface.

Generative Adversarial Network Segmentation

Task-GAN for Improved GAN based Image Restoration

no code implementations ICLR 2019 Jiahong Ouyang, Guanhua Wang, Enhao Gong, Kevin Chen, John Pauly and Greg Zaharchuk

Deep Learning (DL) algorithms based on Generative Adversarial Network (GAN) have demonstrated great potentials in computer vision tasks such as image restoration.

Generative Adversarial Network Hallucination +3

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