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Edward Choi

39 accepted papers

2026

From Conversation to Query Execution: Benchmarking User and Tool Interactions for EHR Database Agents

ICLR 2026poster

Despite the impressive performance of LLM-powered agents, their adoption for Electronic Health Record (EHR) data access remains limited by the absence of benchmarks that adequately capture real-world clinical data access flows. In practice, two core challenges hinder deployment: query ambiguity from…

Cited by 0SourcecodeScholar
2026

Instruction-Guided Lesion Segmentation for Chest X-rays with Automatically Generated Large-Scale Dataset

CVPR 2026

The applicability of current lesion segmentation models for chest X-rays (CXRs) has been limited both by a small number of target labels and the reliance on complex, expert-level text inputs, creating a barrier to practical use. To address these limitations, we introduce instruction-guided lesion se

Cited by 0SourcecodeScholar
2026

ProPerSim: Developing Proactive and Personalized AI Assistants through User-Assistant Simulation

ICLR 2026poster

As large language models (LLMs) become increasingly integrated into daily life, there is growing demand for AI assistants that are not only reactive but also proactive and personalized. While recent advances have pushed forward proactivity and personalization individually, their combination remains…

Cited by 0SourceScholar
2025

CXReasonBench: A Benchmark for Evaluating Structured Diagnostic Reasoning in Chest X-rays

NeurIPS 2025spotlight

Recent progress in Large Vision-Language Models (LVLMs) has enabled promising applications in medical tasks, such as report generation and visual question answering. However, existing benchmarks focus mainly on the final diagnostic answer, offering limited insight into whether models engage in clini…

Cited by 0SourcecodeScholar
2025

Ensembling Large Language Models with Process Reward-Guided Tree Search for Better Complex Reasoning

NAACL 2025long

Despite recent advances in large language models, open-source models often struggle to consistently perform well on complex reasoning tasks. Existing ensemble methods, whether applied at the token or output levels, fail to address these challenges. In response, we present Language model Ensemble wit…

Cited by 8SourcePDFScholar
2025

Generating Multi-Table Time Series EHR from Latent Space with Minimal Preprocessing

NeurIPS 2025poster

Electronic Health Records (EHR) are time-series relational databases that record patient interactions and medical events over time, serving as a critical resource for healthcare research and applications. However, privacy concerns and regulatory restrictions limit the sharing and utilization of such…

Cited by 0SourcecodeScholar
2025

PatientSim: A Persona-Driven Simulator for Realistic Doctor-Patient Interactions

NeurIPS 2025spotlight

Doctor-patient consultations require multi-turn, context-aware communication tailored to diverse patient personas. Training or evaluating doctor LLMs in such settings requires realistic patient interaction systems. However, existing simulators often fail to reflect the full range of personas seen in…

Cited by 0SourcecodeScholar
2025

Single Ground Truth Is Not Enough: Adding Flexibility to Aspect-Based Sentiment Analysis Evaluation

NAACL 2025long

Aspect-based sentiment analysis (ABSA) is a challenging task of extracting sentiments along with their corresponding aspects and opinion terms from the text.The inherent subjectivity of span annotation makes variability in the surface forms of extracted terms, complicating the evaluation process.Tra…

2025

Trans-EnV: A Framework for Evaluating the Linguistic Robustness of LLMs Against English Varieties

NeurIPS 2025poster

Large Language Models (LLMs) are predominantly evaluated on Standard American English (SAE), often overlooking the diversity of global English varieties. This narrow focus may raise fairness concerns as degraded performance on non-standard varieties can lead to unequal benefits for users worldwide.…

Cited by 0SourceScholar
2024

EHR-SeqSQL : A Sequential Text-to-SQL Dataset For Interactively Exploring Electronic Health Records

ACL 2024findings

In this paper, we introduce EHR-SeqSQL, a novel sequential text-to-SQL dataset for Electronic Health Record (EHR) databases. EHR-SeqSQL is designed to address critical yet underexplored aspects in text-to-SQL parsing: interactivity, compositionality, and efficiency. To the best of our knowledge, EHR…

2024

EHRCon: Dataset for Checking Consistency between Unstructured Notes and Structured Tables in Electronic Health Records

NeurIPS 2024spotlight

Electronic Health Records (EHRs) are integral for storing comprehensive patient medical records, combining structured data (e.g., medications) with detailed clinical notes (e.g., physician notes). These elements are essential for straightforward data retrieval and provide deep, contextual insights i…

2024

EHRNoteQA: An LLM Benchmark for Real-World Clinical Practice Using Discharge Summaries

NeurIPS 2024poster

Discharge summaries in Electronic Health Records (EHRs) are crucial for clinical decision-making, but their length and complexity make information extraction challenging, especially when dealing with accumulated summaries across multiple patient admissions. Large Language Models (LLMs) show promise…

2024

Forecasting Future International Events: A Reliable Dataset for Text-Based Event Modeling

EMNLP 2024finding

Predicting future international events from textual information, such as news articles, has tremendous potential for applications in global policy, strategic decision-making, and geopolitics. However, existing datasets available for this task are often limited in quality, hindering the progress of r…

2024

KorNAT: LLM Alignment Benchmark for Korean Social Values and Common Knowledge

ACL 2024findings

To reliably deploy Large Language Models (LLMs) in a specific country, they must possess an understanding of the nation’s culture and basic knowledge. To this end, we introduce National Alignment, which measures the alignment between an LLM and a targeted country from two aspects: social value align…

2024

Publicly Shareable Clinical Large Language Model Built on Synthetic Clinical Notes

ACL 2024findings

The development of large language models tailored for handling patients’ clinical notes is often hindered by the limited accessibility and usability of these notes due to strict privacy regulations.To address these challenges, we first create synthetic large-scale clinical notes using publicly avail…

2024

Self-Supervised Contrastive Learning for Long-term Forecasting

ICLR 2024poster

Long-term forecasting presents unique challenges due to the time and memory complexity of handling long sequences. Existing methods, which rely on sliding windows to process long sequences, struggle to effectively capture long-term variations that are partially caught within the short window (i.e.,…

2023

ECG-QA: A Comprehensive Question Answering Dataset Combined With Electrocardiogram

NeurIPS 2023poster

Question answering (QA) in the field of healthcare has received much attention due to significant advancements in natural language processing. However, existing healthcare QA datasets primarily focus on medical images, clinical notes, or structured electronic health record tables. This leaves the va…

2023

EHRXQA: A Multi-Modal Question Answering Dataset for Electronic Health Records with Chest X-ray Images

NeurIPS 2023poster

Electronic Health Records (EHRs), which contain patients' medical histories in various multi-modal formats, often overlook the potential for joint reasoning across imaging and table modalities underexplored in current EHR Question Answering (QA) systems. In this paper, we introduce EHRXQA, a novel m…

2023

Exploration Into Translation-Equivariant Image Quantization

ICASSP 2023accepted

This is an exploratory study that discovers the current image quantization (vector quantization) do not satisfy translation equivariance in the quantized space due to aliasing. Instead of focusing on anti-aliasing, we propose a simple yet effective way to achieve translation-equivariant image quanti…

Cited by 0SourceScholar
2023

FactKG: Fact Verification via Reasoning on Knowledge Graphs

ACL 2023long

In real world applications, knowledge graphs (KG) are widely used in various domains (e.g. medical applications and dialogue agents). However, for fact verification, KGs have not been adequately utilized as a knowledge source. KGs can be a valuable knowledge source in fact verification due to their…

2023

KG-GPT: A General Framework for Reasoning on Knowledge Graphs Using Large Language Models

EMNLP 2023short findings

While large language models (LLMs) have made considerable advancements in understanding and generating unstructured text, their application in structured data remains underexplored. Particularly, using LLMs for complex reasoning tasks on knowledge graphs (KGs) remains largely untouched. To address t…

Cited by 0SourcecodeScholar
2023

Open-WikiTable : Dataset for Open Domain Question Answering with Complex Reasoning over Table

ACL 2023findings

Despite recent interest in open domain question answering (ODQA) over tables, many studies still rely on datasets that are not truly optimal for the task with respect to utilizing structural nature of table. These datasets assume answers reside as a single cell value and do not necessitate exploring…

2023

Perspective Projection-Based 3d CT Reconstruction from Biplanar X-Rays

ICASSP 2023accepted

X-ray computed tomography (CT) is one of the most common imaging techniques used to diagnose various diseases in the medical field. Its high contrast sensitivity and spatial resolution allow the physician to observe details of body parts such as bones, soft tissue, blood vessels, etc. As it involves…

Cited by 0SourceScholar
2023

Revisiting the Importance of Amplifying Bias for Debiasing

AAAI 2023technical

In image classification, debiasing aims to train a classifier to be less susceptible to dataset bias, the strong correlation between peripheral attributes of data samples and a target class. For example, even if the frog class in the dataset mainly consists of frog images with a swamp background (i.…

Cited by 25SourcePDFScholar
2023

Text-to-ECG: 12-Lead Electrocardiogram Synthesis Conditioned on Clinical Text Reports

ICASSP 2023accepted

Electrocardiogram (ECG) synthesis is the area of research focused on generating realistic synthetic ECG signals for medical use without concerns over annotation costs or clinical data privacy restrictions. Traditional ECG generation models consider a single ECG lead and utilize GAN-based generative…

Cited by 0SourceScholar
2023

VisAlign: Dataset for Measuring the Alignment between AI and Humans in Visual Perception

NeurIPS 2023poster

AI alignment refers to models acting towards human-intended goals, preferences, or ethical principles. Analyzing the similarity between models and humans can be a proxy measure for ensuring AI safety. In this paper, we focus on the models' visual perception alignment with humans, further referred to…

2022

EHRSQL: A Practical Text-to-SQL Benchmark for Electronic Health Records

NeurIPS 2022accept

We present a new text-to-SQL dataset for electronic health records (EHRs). The utterances were collected from 222 hospital staff, including physicians, nurses, insurance review and health records teams, and more. To construct the QA dataset on structured EHR data, we conducted a poll at a university…

2022

Rethinking Style Transformer with Energy-based Interpretation: Adversarial Unsupervised Style Transfer using a Pretrained Model

EMNLP 2022main

Style control, content preservation, and fluency determine the quality of text style transfer models. To train on a nonparallel corpus, several existing approaches aim to deceive the style discriminator with an adversarial loss. However, adversarial training significantly degrades fluency compared t…

Cited by 0SourcePDFScholar
2022

Reweighting Strategy Based on Synthetic Data Identification for Sentence Similarity

COLING 2022main

Semantically meaningful sentence embeddings are important for numerous tasks in natural language processing. To obtain such embeddings, recent studies explored the idea of utilizing synthetically generated data from pretrained language models(PLMs) as a training corpus. However, PLMs often generate…

2022

Specializing Multi-domain NMT via Penalizing Low Mutual Information

EMNLP 2022main

Multi-domain Neural Machine Translation (NMT) trains a single model with multiple domains. It is appealing because of its efficacy in handling multiple domains within one model. An ideal multi-domain NMT learns distinctive domain characteristics simultaneously, however, grasping the domain peculiari…

2021

Improving Lexically Constrained Neural Machine Translation with Source-Conditioned Masked Span Prediction

ACL 2021short

Accurate terminology translation is crucial for ensuring the practicality and reliability of neural machine translation (NMT) systems. To address this, lexically constrained NMT explores various methods to ensure pre-specified words and phrases appear in the translation output. However, in many case…

2021

Vid-ODE: Continuous-Time Video Generation with Neural Ordinary Differential Equation

AAAI 2021technical

Video generation models often operate under the assumption of fixed frame rates, which leads to suboptimal performance when it comes to handling flexible frame rates (e.g., increasing the frame rate of the more dynamic portion of the video as well as handling missing video frames). To resolve the re…

2018

Compositional Obverter Communication Learning from Raw Visual Input

ICLR 2018poster

One of the distinguishing aspects of human language is its compositionality, which allows us to describe complex environments with limited vocabulary. Previously, it has been shown that neural network agents can learn to communicate in a highly structured, possibly compositional language based on di…

Cited by 93SourcePDFScholar
2018

MiME: Multilevel Medical Embedding of Electronic Health Records for Predictive Healthcare

NeurIPS 2018poster

Deep learning models exhibit state-of-the-art performance for many predictive healthcare tasks using electronic health records (EHR) data, but these models typically require training data volume that exceeds the capacity of most healthcare systems. External resources such as medical ontologies are u…

2018

MorphNet: Fast & Simple Resource-Constrained Structure Learning of Deep Networks

CVPR 2018poster

We present MorphNet, an approach to automate the design of neural network structures. MorphNet iteratively shrinks and expands a network, shrinking via a resource-weighted sparsifying regularizer on activations and expanding via a uniform multiplicative factor on all layers. In contrast to previou…

Cited by 432SourcePDFScholar
2016

RETAIN: An Interpretable Predictive Model for Healthcare using Reverse Time Attention Mechanism

NeurIPS 2016poster

Accuracy and interpretability are two dominant features of successful predictive models. Typically, a choice must be made in favor of complex black box models such as recurrent neural networks (RNN) for accuracy versus less accurate but more interpretable traditional models such as logistic regressi…