Search Results for author: Ipek Oguz

Found 35 papers, 15 papers with code

AdaptDiff: Cross-Modality Domain Adaptation via Weak Conditional Semantic Diffusion for Retinal Vessel Segmentation

1 code implementation6 Oct 2024 Dewei Hu, Hao Li, Han Liu, Jiacheng Wang, Xing Yao, Daiwei Lu, Ipek Oguz

Subsequently, we sample on the target domain with binary vessel masks from the source domain to get paired data, i. e., target domain synthetic images conditioned on the binary vessel map.

Image Segmentation Retinal Vessel Segmentation +3

PRISM Lite: A lightweight model for interactive 3D placenta segmentation in ultrasound

2 code implementations9 Aug 2024 Hao Li, Baris Oguz, Gabriel Arenas, Xing Yao, Jiacheng Wang, Alison Pouch, Brett Byram, Nadav Schwartz, Ipek Oguz

The proposed model adopts the segmentation from our fully automated model for initialization and is designed in a human-in-the-loop manner to achieve iterative improvements.

Interactive Segmentation Placenta Segmentation +1

Deep Learning-based Unsupervised Domain Adaptation via a Unified Model for Prostate Lesion Detection Using Multisite Bi-parametric MRI Datasets

no code implementations8 Aug 2024 Hao Li, Han Liu, Heinrich von Busch, Robert Grimm, Henkjan Huisman, Angela Tong, David Winkel, Tobias Penzkofer, Ivan Shabunin, Moon Hyung Choi, Qingsong Yang, Dieter Szolar, Steven Shea, Fergus Coakley, Mukesh Harisinghani, Ipek Oguz, Dorin Comaniciu, Ali Kamen, Bin Lou

This method translates diffusion-weighted imaging (DWI) acquisitions, including apparent diffusion coefficient (ADC) and individual DW images acquired using various b-values, to align with the style of images acquired using b-values recommended by Prostate Imaging Reporting and Data System (PI-RADS) guidelines.

Lesion Detection Unsupervised Domain Adaptation

Retinal IPA: Iterative KeyPoints Alignment for Multimodal Retinal Imaging

no code implementations25 Jul 2024 Jiacheng Wang, Hao Li, Dewei Hu, Rui Xu, Xing Yao, Yuankai K. Tao, Ipek Oguz

We propose a novel framework for retinal feature point alignment, designed for learning cross-modality features to enhance matching and registration across multi-modality retinal images.

Segmentation

Interactive Segmentation Model for Placenta Segmentation from 3D Ultrasound images

2 code implementations10 Jul 2024 Hao Li, Baris Oguz, Gabriel Arenas, Xing Yao, Jiacheng Wang, Alison Pouch, Brett Byram, Nadav Schwartz, Ipek Oguz

These models produce a segmentation from visual prompts provided to indicate the target region, which may offer a feasible solution for practical use.

Interactive Segmentation Placenta Segmentation +1

Predicting fluorescent labels in label-free microscopy images with pix2pix and adaptive loss in Light My Cells challenge

1 code implementation22 Jun 2024 Han Liu, Hao Li, Jiacheng Wang, Yubo Fan, Zhoubing Xu, Ipek Oguz

Recently, in silico labeling has emerged as a promising alternative, aiming to use machine learning models to directly predict the fluorescently labeled images from label-free microscopy.

Partially Labeled Datasets

Novel OCT mosaicking pipeline with Feature- and Pixel-based registration

1 code implementation21 Nov 2023 Jiacheng Wang, Hao Li, Dewei Hu, Yuankai K. Tao, Ipek Oguz

High-resolution Optical Coherence Tomography (OCT) images are crucial for ophthalmology studies but are limited by their relatively narrow field of view (FoV).

Computational Efficiency

Learning Site-specific Styles for Multi-institutional Unsupervised Cross-modality Domain Adaptation

1 code implementation21 Nov 2023 Han Liu, Yubo Fan, Zhoubing Xu, Benoit M. Dawant, Ipek Oguz

In this paper, we present our solution to tackle the multi-institutional unsupervised domain adaptation for the crossMoDA 2023 challenge.

Medical Image Analysis Medical Image Segmentation +2

Promise:Prompt-driven 3D Medical Image Segmentation Using Pretrained Image Foundation Models

1 code implementation30 Oct 2023 Hao Li, Han Liu, Dewei Hu, Jiacheng Wang, Ipek Oguz

To address prevalent issues in medical imaging, such as data acquisition challenges and label availability, transfer learning from natural to medical image domains serves as a viable strategy to produce reliable segmentation results.

Image Segmentation Medical Image Segmentation +4

False Negative/Positive Control for SAM on Noisy Medical Images

1 code implementation20 Aug 2023 Xing Yao, Han Liu, Dewei Hu, Daiwei Lu, Ange Lou, Hao Li, Ruining Deng, Gabriel Arenas, Baris Oguz, Nadav Schwartz, Brett C Byram, Ipek Oguz

The method couples multi-box prompt augmentation and an aleatoric uncertainty-based false-negative (FN) and false-positive (FP) correction (FNPC) strategy.

Image Segmentation Medical Image Segmentation +2

CATS v2: Hybrid encoders for robust medical segmentation

2 code implementations11 Aug 2023 Hao Li, Han Liu, Dewei Hu, Xing Yao, Jiacheng Wang, Ipek Oguz

We fuse the information from the convolutional encoder and the transformer at the skip connections of different resolutions to form the final segmentation.

Domain Adaptation Image Segmentation +3

COLosSAL: A Benchmark for Cold-start Active Learning for 3D Medical Image Segmentation

1 code implementation22 Jul 2023 Han Liu, Hao Li, Xing Yao, Yubo Fan, Dewei Hu, Benoit Dawant, Vishwesh Nath, Zhoubing Xu, Ipek Oguz

Cold-start AL is highly relevant in many practical scenarios but has been under-explored, especially for 3D medical segmentation tasks requiring substantial annotation effort.

Active Learning Image Segmentation +4

Deep Angiogram: Trivializing Retinal Vessel Segmentation

no code implementations1 Jul 2023 Dewei Hu, Xing Yao, Jiacheng Wang, Yuankai K. Tao, Ipek Oguz

The generalizability of the synthetic network is improved by the contrastive loss that makes the model less sensitive to variations of image contrast and noisy features.

Retinal Vessel Segmentation Segmentation

Self-Supervised CSF Inpainting with Synthetic Atrophy for Improved Accuracy Validation of Cortical Surface Analyses

no code implementations10 Mar 2023 Jiacheng Wang, Kathleen E. Larson, Ipek Oguz

In this paper, we present a solution using a self-supervised inpainting model to generate CSF in these regions and create images with more plausible GM/CSF boundaries.

Enhancing Data Diversity for Self-training Based Unsupervised Cross-modality Vestibular Schwannoma and Cochlea Segmentation

no code implementations23 Sep 2022 Han Liu, Yubo Fan, Ipek Oguz, Benoit M. Dawant

Automatic segmentation of vestibular schwannoma (VS) and cochlea from magnetic resonance imaging can facilitate VS treatment planning.

Diversity Segmentation +2

Cats: Complementary CNN and Transformer Encoders for Segmentation

no code implementations24 Aug 2022 Hao Li, Dewei Hu, Han Liu, Jiacheng Wang, Ipek Oguz

We fuse the information from the convolutional encoder and the transformer, and pass it to the decoder to obtain the results.

3D Medical Imaging Segmentation Decoder +2

Segmentation of kidney stones in endoscopic video feeds

no code implementations29 Apr 2022 Zachary A Stoebner, Daiwei Lu, Seok Hee Hong, Nicholas L Kavoussi, Ipek Oguz

Image segmentation has been increasingly applied in medical settings as recent developments have skyrocketed the potential applications of deep learning.

Deep Learning Image Segmentation +2

ModDrop++: A Dynamic Filter Network with Intra-subject Co-training for Multiple Sclerosis Lesion Segmentation with Missing Modalities

1 code implementation7 Mar 2022 Han Liu, Yubo Fan, Hao Li, Jiacheng Wang, Dewei Hu, Can Cui, Ho Hin Lee, Huahong Zhang, Ipek Oguz

Previously, a training strategy termed Modality Dropout (ModDrop) has been applied to MS lesion segmentation to achieve the state-of-the-art performance with missing modality.

Lesion Segmentation

Unsupervised Denoising of Retinal OCT with Diffusion Probabilistic Model

1 code implementation27 Jan 2022 Dewei Hu, Yuankai K. Tao, Ipek Oguz

A diffusion process is defined by adding a sequence of Gaussian noise to self-fused OCT b-scans.

Denoising Image Restoration

Unsupervised Cross-Modality Domain Adaptation for Segmenting Vestibular Schwannoma and Cochlea with Data Augmentation and Model Ensemble

no code implementations24 Sep 2021 Hao Li, Dewei Hu, Qibang Zhu, Kathleen E. Larson, Huahong Zhang, Ipek Oguz

To overcome this problem, domain adaptation is an effective way to leverage information from source domain to obtain accurate segmentations without requiring manual labels in target domain.

Data Augmentation Domain Adaptation +2

LIFE: A Generalizable Autodidactic Pipeline for 3D OCT-A Vessel Segmentation

no code implementations9 Jul 2021 Dewei Hu, Can Cui, Hao Li, Kathleen E. Larson, Yuankai K. Tao, Ipek Oguz

We then construct the local intensity fusion encoder (LIFE) to map a given OCT-A volume and its LIF counterpart to a shared latent space.

Retinal Vessel Segmentation Segmentation

Retinal OCT Denoising with Pseudo-Multimodal Fusion Network

no code implementations9 Jul 2021 Dewei Hu, Joseph D. Malone, Yigit Atay, Yuankai K. Tao, Ipek Oguz

Evaluated by intensity-based and structural metrics, the result shows that our method can effectively suppress the speckle noise and enhance the contrast between retina layers while the overall structure and small blood vessels are preserved.

Denoising

Tensor-Based Grading: A Novel Patch-Based Grading Approach for the Analysis of Deformation Fields in Huntington's Disease

no code implementations23 Jan 2020 Kilian Hett, Hans Johnson, Pierrick Coupé, Jane Paulsen, Jeffrey Long, Ipek Oguz

In this work, we propose to combine the advantages of these two approaches by extending the patch-based grading framework with a new tensor-based grading method that enables us to model patterns of local deformation using a log-Euclidean metric.

General Classification

Medical Imaging with Deep Learning: MIDL 2019 -- Extended Abstract Track

no code implementations21 May 2019 M. Jorge Cardoso, Aasa Feragen, Ben Glocker, Ender Konukoglu, Ipek Oguz, Gozde Unal, Tom Vercauteren

This compendium gathers all the accepted extended abstracts from the Second International Conference on Medical Imaging with Deep Learning (MIDL 2019), held in London, UK, 8-10 July 2019.

BIG-bench Machine Learning Deep Learning

Efficient optimization for Hierarchically-structured Interacting Segments (HINTS)

no code implementations CVPR 2017 Hossam Isack, Olga Veksler, Ipek Oguz, Milan Sonka, Yuri Boykov

We propose an effective optimization algorithm for a general hierarchical segmentation model with geometric interactions between segments.

Segmentation

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