Search Results for author: Maciej A. Mazurowski

Found 35 papers, 18 papers with code

Rethinking Perceptual Metrics for Medical Image Translation

no code implementations10 Apr 2024 Nicholas Konz, YuWen Chen, Hanxue Gu, Haoyu Dong, Maciej A. Mazurowski

Modern medical image translation methods use generative models for tasks such as the conversion of CT images to MRI.

Translation

Deep learning automates Cobb angle measurement compared with multi-expert observers

no code implementations18 Mar 2024 Keyu Li, Hanxue Gu, Roy Colglazier, Robert Lark, Elizabeth Hubbard, Robert French, Denise Smith, Jikai Zhang, Erin McCrum, Anthony Catanzano, Joseph Cao, Leah Waldman, Maciej A. Mazurowski, Benjamin Alman

To address these challenges and the lack of interpretability found in certain existing automated methods, we have created fully automated software that not only precisely measures the Cobb angle but also provides clear visualizations of these measurements.

ContourDiff: Unpaired Image Translation with Contour-Guided Diffusion Models

no code implementations16 Mar 2024 YuWen Chen, Nicholas Konz, Hanxue Gu, Haoyu Dong, Yaqian Chen, Lin Li, Jisoo Lee, Maciej A. Mazurowski

We evaluate our method by training a segmentation model on images translated from CT to MRI with their original CT masks and testing its performance on real MRIs.

Anatomy Translation

Anatomically-Controllable Medical Image Generation with Segmentation-Guided Diffusion Models

1 code implementation7 Feb 2024 Nicholas Konz, YuWen Chen, Haoyu Dong, Maciej A. Mazurowski

Diffusion models have enabled remarkably high-quality medical image generation, yet it is challenging to enforce anatomical constraints in generated images.

counterfactual Image Generation +1

The Effect of Intrinsic Dataset Properties on Generalization: Unraveling Learning Differences Between Natural and Medical Images

1 code implementation16 Jan 2024 Nicholas Konz, Maciej A. Mazurowski

We address this gap in knowledge by establishing and empirically validating a generalization scaling law with respect to $d_{data}$, and propose that the substantial scaling discrepancy between the two considered domains may be at least partially attributed to the higher intrinsic ``label sharpness'' ($K_\mathcal{F}$) of medical imaging datasets, a metric which we propose.

Adversarial Attack Adversarial Robustness +1

Domain Generalization for Medical Image Analysis: A Survey

no code implementations5 Oct 2023 Jee Seok Yoon, Kwanseok Oh, Yooseung Shin, Maciej A. Mazurowski, Heung-Il Suk

Medical image analysis (MedIA) has become an essential tool in medicine and healthcare, aiding in disease diagnosis, prognosis, and treatment planning, and recent successes in deep learning (DL) have made significant contributions to its advances.

Domain Generalization

A systematic study of the foreground-background imbalance problem in deep learning for object detection

no code implementations28 Jun 2023 Hanxue Gu, Haoyu Dong, Nicholas Konz, Maciej A. Mazurowski

We experimentally study the effects of different aspects of F-B imbalance (object size, number of objects, dataset size, object type) on detection performance.

Object object-detection +1

Convolutional Neural Networks Rarely Learn Shape for Semantic Segmentation

no code implementations11 May 2023 Yixin Zhang, Maciej A. Mazurowski

Shape learning, or the ability to leverage shape information, could be a desirable property of convolutional neural networks (CNNs) when target objects have specific shapes.

Semantic Segmentation

Unsupervised anomaly localization in high-resolution breast scans using deep pluralistic image completion

1 code implementation4 May 2023 Nicholas Konz, Haoyu Dong, Maciej A. Mazurowski

Given the scarcity of abnormal images and the abundance of normal images for this problem, an anomaly detection/localization approach could be well-suited.

Anomaly Detection

Segment Anything Model for Medical Image Analysis: an Experimental Study

2 code implementations20 Apr 2023 Maciej A. Mazurowski, Haoyu Dong, Hanxue Gu, Jichen Yang, Nicholas Konz, Yixin Zhang

We conclude that SAM shows impressive zero-shot segmentation performance for certain medical imaging datasets, but moderate to poor performance for others.

Image Segmentation Interactive Segmentation +5

Reverse Engineering Breast MRIs: Predicting Acquisition Parameters Directly from Images

1 code implementation8 Mar 2023 Nicholas Konz, Maciej A. Mazurowski

The image acquisition parameters (IAPs) used to create MRI scans are central to defining the appearance of the images.

Domain Adaptation

Deep Learning for Breast MRI Style Transfer with Limited Training Data

1 code implementation5 Jan 2023 Shixing Cao, Nicholas Konz, James Duncan, Maciej A. Mazurowski

In this work we introduce a novel medical image style transfer method, StyleMapper, that can transfer medical scans to an unseen style with access to limited training data.

object-detection Object Detection +1

Deep Learning for Classification of Thyroid Nodules on Ultrasound: Validation on an Independent Dataset

no code implementations27 Jul 2022 Jingxi Weng, Benjamin Wildman-Tobriner, Mateusz Buda, Jichen Yang, Lisa M. Ho, Brian C. Allen, Wendy L. Ehieli, Chad M. Miller, Jikai Zhang, Maciej A. Mazurowski

Objectives: The purpose is to apply a previously validated deep learning algorithm to a new thyroid nodule ultrasound image dataset and compare its performances with radiologists.

Deep learning-based algorithm for assessment of knee osteoarthritis severity in radiographs matches performance of radiologists

no code implementations25 Jul 2022 Albert Swiecicki, Nianyi Li, Jonathan O'Donnell, Nicholas Said, Jichen Yang, Richard C. Mather, William A. Jiranek, Maciej A. Mazurowski

A novel deep learning-based method was utilized for assessment of knee OA in two steps: (1) localization of knee joints in the images, (2) classification according to the KL grading system.

The Intrinsic Manifolds of Radiological Images and their Role in Deep Learning

1 code implementation6 Jul 2022 Nicholas Konz, Hanxue Gu, Haoyu Dong, Maciej A. Mazurowski

These results give a more principled underpinning for the intuition that radiological images can be more challenging to apply deep learning to than natural image datasets common to machine learning research.

Knee arthritis severity measurement using deep learning: a publicly available algorithm with a multi-institutional validation showing radiologist-level performance

1 code implementation16 Mar 2022 Hanxue Gu, Keyu Li, Roy J. Colglazier, Jichen Yang, Michael Lebhar, Jonathan O'Donnell, William A. Jiranek, Richard C. Mather, Rob J. French, Nicholas Said, Jikai Zhang, Christine Park, Maciej A. Mazurowski

We propose a novel deep learning-based five-step algorithm to automatically grade KOA from posterior-anterior (PA) views of radiographs: (1) image preprocessing (2) localization of knees joints in the image using the YOLO v3-Tiny model, (3) initial assessment of the severity of osteoarthritis using a convolutional neural network-based classifier, (4) segmentation of the joints and calculation of the joint space narrowing (JSN), and (5), a combination of the JSN and the initial assessment to determine a final Kellgren-Lawrence (KL) score.

Lightweight Transformer Backbone for Medical Object Detection

no code implementations22 Nov 2021 Yifan Zhang, Haoyu Dong, Nicholas Konz, Hanxue Gu, Maciej A. Mazurowski

Specifically, we propose a novel modification of visual transformer (ViT) on image feature patches to connect the feature patches of a tumor with healthy backgrounds of breast images and form a more robust backbone for tumor detection.

Lesion Detection Medical Object Detection +2

Detection of masses and architectural distortions in digital breast tomosynthesis: a publicly available dataset of 5,060 patients and a deep learning model

1 code implementation13 Nov 2020 Mateusz Buda, Ashirbani Saha, Ruth Walsh, Sujata Ghate, Nianyi Li, Albert Święcicki, Joseph Y. Lo, Maciej A. Mazurowski

While breast cancer screening has been one of the most studied medical imaging applications of artificial intelligence, the development and evaluation of the algorithms are hindered due to the lack of well-annotated large-scale publicly available datasets.

Classification of Multiple Diseases on Body CT Scans using Weakly Supervised Deep Learning

1 code implementation3 Aug 2020 Fakrul Islam Tushar, Vincent M. D'Anniballe, Rui Hou, Maciej A. Mazurowski, Wanyi Fu, Ehsan Samei, Geoffrey D. Rubin, Joseph Y. Lo

Purpose: To design multi-disease classifiers for body CT scans for three different organ systems using automatically extracted labels from radiology text reports. Materials & Methods: This retrospective study included a total of 12, 092 patients (mean age 57 +- 18; 6, 172 women) for model development and testing (from 2012-2017).

Computed Tomography (CT) General Classification

Machine-Learning-Based Multiple Abnormality Prediction with Large-Scale Chest Computed Tomography Volumes

1 code implementation12 Feb 2020 Rachel Lea Draelos, David Dov, Maciej A. Mazurowski, Joseph Y. Lo, Ricardo Henao, Geoffrey D. Rubin, Lawrence Carin

This model reached a classification performance of AUROC greater than 0. 90 for 18 abnormalities, with an average AUROC of 0. 773 for all 83 abnormalities, demonstrating the feasibility of learning from unfiltered whole volume CT data.

BIG-bench Machine Learning Computed Tomography (CT) +1

Normalization of breast MRIs using Cycle-Consistent Generative Adversarial Networks

no code implementations16 Dec 2019 Gourav Modanwal, Adithya Vellal, Maciej A. Mazurowski

Second, we propose a modified discriminator architecture which utilizes a smaller field-of-view to ensure the preservation of finer details in the breast tissue.

Generative Adversarial Network

Automatic deep learning-based normalization of breast dynamic contrast-enhanced magnetic resonance images

no code implementations5 Jul 2018 Jun Zhang, Ashirbani Saha, Brian J. Soher, Maciej A. Mazurowski

Then, based on the segmentation results, a subject-specific piecewise linear mapping function was applied between the anchor points to normalize the same type of tissue in different patients into the same intensity ranges.

Segmentation

Deep learning in radiology: an overview of the concepts and a survey of the state of the art

no code implementations10 Feb 2018 Maciej A. Mazurowski, Mateusz Buda, Ashirbani Saha, Mustafa R. Bashir

In this article, we review the clinical reality of radiology and discuss the opportunities for application of deep learning algorithms.

Deep Learning for identifying radiogenomic associations in breast cancer

no code implementations29 Nov 2017 Zhe Zhu, Ehab AlBadawy, Ashirbani Saha, Jun Zhang, Michael R. Harowicz, Maciej A. Mazurowski

Results: The best AUC performance for distinguishing molecular subtypes was 0. 65 (95% CI:[0. 57, 0. 71]) and was achieved by the off-the-shelf deep features approach.

Transfer Learning

Deep learning analysis of breast MRIs for prediction of occult invasive disease in ductal carcinoma in situ

no code implementations28 Nov 2017 Zhe Zhu, Michael Harowicz, Jun Zhang, Ashirbani Saha, Lars J. Grimm, E. Shelley Hwang, Maciej A. Mazurowski

In the first approach, we adopted the transfer learning strategy, in which a network pre-trained on a large dataset of natural images is fine-tuned with our DCIS images.

Transfer Learning

A systematic study of the class imbalance problem in convolutional neural networks

3 code implementations15 Oct 2017 Mateusz Buda, Atsuto Maki, Maciej A. Mazurowski

In our study, we use three benchmark datasets of increasing complexity, MNIST, CIFAR-10 and ImageNet, to investigate the effects of imbalance on classification and perform an extensive comparison of several methods to address the issue: oversampling, undersampling, two-phase training, and thresholding that compensates for prior class probabilities.

BIG-bench Machine Learning General Classification

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