Search Results for author: Bobak J. Mortazavi

Found 13 papers, 7 papers with code

Density-Aware Personalized Training for Risk Prediction in Imbalanced Medical Data

no code implementations23 Jul 2022 Zepeng Huo, Xiaoning Qian, Shuai Huang, Zhangyang Wang, Bobak J. Mortazavi

Medical events of interest, such as mortality, often happen at a low rate in electronic medical records, as most admitted patients survive.

Self-supervised contrastive learning of echocardiogram videos enables label-efficient cardiac disease diagnosis

2 code implementations23 Jul 2022 Gregory Holste, Evangelos K. Oikonomou, Bobak J. Mortazavi, Zhangyang Wang, Rohan Khera

Advances in self-supervised learning (SSL) have shown that self-supervised pretraining on medical imaging data can provide a strong initialization for downstream supervised classification and segmentation.

Classification Contrastive Learning +3

Predicting the meal macronutrient composition from continuous glucose monitors

no code implementations23 Jun 2022 Zepeng Huo, Bobak J. Mortazavi, Theodora Chaspari, Nicolaas Deutz, Laura Ruebush, Ricardo Gutierrez-Osuna

We built a multitask neural network to estimate the macronutrient composition from the CGM signal, and compared it against a baseline linear regression.

Automated multilabel diagnosis on electrocardiographic images and signals

no code implementations Nature Communications 2022 Veer Sangha, Bobak J. Mortazavi, Adrian D. Haimovich, Antônio H. Ribeiro, Cynthia A. Brandt, Daniel L. Jacoby, Wade L. Schulz, Harlan M. Krumholz, Antonio Luiz P. Ribeiro & Rohan Khera

The application of artificial intelligence (AI) for automated diagnosis of electrocardiograms (ECGs) can improve care in remote settings but is limited by the reliance on infrequently available signal-based data.

Boosted-SpringDTW for Comprehensive Feature Extraction of Physiological Signals

no code implementations11 Jan 2022 Jonathan Martinez, Kaan Sel, Bobak J. Mortazavi, Roozbeh Jafari

Goal: To achieve-high quality comprehensive feature extraction from physiological signals that enables precise physiological parameter estimation despite evolving waveform morphologies.

Dynamic Time Warping

Dynamically Extracting Outcome-Specific Problem Lists from Clinical Notes with Guided Multi-Headed Attention

1 code implementation25 Jul 2020 Justin Lovelace, Nathan C. Hurley, Adrian D. Haimovich, Bobak J. Mortazavi

We identify risk factors for both readmission and mortality outcomes and demonstrate that our framework can be used to develop dynamic problem lists that present clinical problems along with their quantitative importance.

BoXHED: Boosted eXact Hazard Estimator with Dynamic covariates

1 code implementation ICML 2020 Xiaochen Wang, Arash Pakbin, Bobak J. Mortazavi, Hongyu Zhao, Donald K. K. Lee

BoXHED 1. 0 is a novel tree-based implementation of the generic estimator proposed in Lee, Chen, Ishwaran (2017), which was designed for handling time-dependent covariates in a fully nonparametric manner.

Open-Ended Question Answering Survival Analysis

Explainable Prediction of Adverse Outcomes Using Clinical Notes

1 code implementation30 Oct 2019 Justin R. Lovelace, Nathan C. Hurley, Adrian D. Haimovich, Bobak J. Mortazavi

Clinical notes contain a large amount of clinically valuable information that is ignored in many clinical decision support systems due to the difficulty that comes with mining that information.

A Survey of Challenges and Opportunities in Sensing and Analytics for Cardiovascular Disorders

no code implementations12 Aug 2019 Nathan C. Hurley, Erica S. Spatz, Harlan M. Krumholz, Roozbeh Jafari, Bobak J. Mortazavi

We highlight three primary needs in the design of new smart health technologies: 1) the need for sensing technology that can track longitudinal trends in signs and symptoms of the cardiovascular disorder despite potentially infrequent, noisy, or missing data measurements; 2) the need for new analytic techniques that model data captured in a longitudinal, continual fashion to aid in the development of new risk prediction techniques and in tracking disease progression; and 3) the need for machine learning techniques that are personalized and interpretable, allowing for advancements in shared clinical decision making.

BIG-bench Machine Learning Decision Making

Visualization of Emergency Department Clinical Data for Interpretable Patient Phenotyping

1 code implementation5 Jul 2019 Nathan C. Hurley, Adrian D. Haimovich, R. Andrew Taylor, Bobak J. Mortazavi

In the five chief complaints, we find between 2 and 6 clusters, with the peak mean pairwise ARI between subsequent training iterations to range from 0. 35 to 0. 74.

Decision Making Dimensionality Reduction +1

Cannot find the paper you are looking for? You can Submit a new open access paper.