364 results match your criteria: "Stanford Center for Biomedical Informatics Research[Affiliation]"

We have developed the regionalpcs method, an approach for summarizing gene-level methylation. regionalpcs addresses the challenge of deciphering complex epigenetic mechanisms in diseases like Alzheimer's disease. In contrast to averaging, regionalpcs uses principal components analysis to capture complex methylation patterns across gene regions.

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Background: Non-small-cell lung cancer (NSCLC) remains a global health challenge, driving morbidity and mortality. The emerging field of radiogenomics utilizes statistical methods to correlate radiographic tumor features with genomic characteristics from biopsy samples. Radiomic techniques automate the precise extraction of imaging features from tumor regions in radiographic scans, which are subjected to machine learning (ML) to predict genomic attributes.

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In this study, we investigate the performance of computer vision AI algorithms in predicting patient disposition from the emergency department (ED) using short video clips. Clinicians often use "eye-balling" or clinical gestalt to aid in triage, based on brief observations. We hypothesize that AI can similarly use patient appearance for disposition prediction.

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Asthma is a heterogeneous disease with variable presentation and characteristics. There is a critical need to identify underlying molecular endotypes of asthma. We performed the largest transcriptomic analysis of 808 bronchial epithelial cell (BEC) samples across 11 independent cohorts, including 3 cohorts from the Severe Asthma Research Program (SARP).

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Objectives: We aimed to demonstrate the importance of establishing best practices in large language model research, using repeat prompting as an illustrative example.

Materials And Methods: Using data from a prior study investigating potential model bias in peer review of medical abstracts, we compared methods that ignore correlation in model outputs from repeated prompting with a random effects method that accounts for this correlation.

Results: High correlation within groups was found when repeatedly prompting the model, with intraclass correlation coefficient of 0.

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Artificial Intelligence (AI) technologies are increasingly capable of processing complex and multilayered datasets. Innovations in generative AI and deep learning have notably enhanced the extraction of insights from both unstructured texts, images, and structured data alike. These breakthroughs in AI technology have spurred a wave of research in the medical field, leading to the creation of a variety of tools aimed at improving clinical decision-making, patient monitoring, image analysis, and emergency response systems.

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Artificial intelligence (AI) has become an omnipresent topic in the media. Lively discussions are being held on how AI could revolutionize the global healthcare landscape. The development of innovative AI models, including in the medical sector, is increasingly dominated by large high-tech companies.

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The text2term tool to map free-text descriptions of biomedical terms to ontologies.

Database (Oxford)

November 2024

Center for Computational Biomedicine, Harvard Medical School, 10 Shattuck St, Boston, MA 02115, United States.

There is an ongoing need for scalable tools to aid researchers in both retrospective and prospective standardization of discrete entity types-such as disease names, cell types, or chemicals-that are used in metadata associated with biomedical data. When metadata are not well-structured or precise, the associated data are harder to find and are often burdensome to reuse, analyze, or integrate with other datasets due to the upfront curation effort required to make the data usable-typically through retrospective standardization and cleaning of the (meta)data. With the goal of facilitating the task of standardizing metadata-either in bulk or in a one-by-one fashion, e.

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Learning from the EHR to implement AI in healthcare.

NPJ Digit Med

November 2024

Division of Hospital Medicine, Stanford University School of Medicine, Stanford, CA, USA.

The introduction of the electronic health record was heralded as a technology solution to improve care quality and efficiency, but these tools have contributed to increased administrative burden and burnout for clinicians. Today, artificial intelligence is receiving much of the same attention and promises as electronic health records. Can healthcare learn from the failures of electronic health records to maximize the potential of artificial intelligence?

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Digital profiling of gene expression from histology images with linearized attention.

Nat Commun

November 2024

Department of Medicine, Stanford Center for Biomedical Informatics Research (BMIR), Stanford University, Stanford, CA, 94305, USA.

Article Synopsis
  • Cancer is complex and expensive to analyze, often requiring genetic profiling for better treatment strategies.
  • Recent advancements in deep learning have improved the prediction of genetic changes from whole slide images, but transformers have been challenging to implement due to their complexity and data limitations.
  • The new SEQUOIA model, which uses a simplified transformer approach, successfully predicts cancer-related gene information from vast numbers of tumor samples and has shown promise in aiding breast cancer risk assessment and understanding gene expression in specific regions.
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The genome is a sequence that encodes the DNA, RNA, and proteins that orchestrate an organism's function. We present Evo, a long-context genomic foundation model with a frontier architecture trained on millions of prokaryotic and phage genomes, and report scaling laws on DNA to complement observations in language and vision. Evo generalizes across DNA, RNA, and proteins, enabling zero-shot function prediction competitive with domain-specific language models and the generation of functional CRISPR-Cas and transposon systems, representing the first examples of protein-RNA and protein-DNA codesign with a language model.

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Generative artificial intelligence (generative AI) is a new technology with potentially broad applications across important domains of healthcare, but serious questions remain about how to balance the promise of generative AI against unintended consequences from adoption of these tools. In this position statement, we provide recommendations on behalf of the Society of General Internal Medicine on how clinicians, technologists, and healthcare organizations can approach the use of these tools. We focus on three major domains of medical practice where clinicians and technology experts believe generative AI will have substantial immediate and long-term impacts: clinical decision-making, health systems optimization, and the patient-physician relationship.

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Large Language Model Influence on Diagnostic Reasoning: A Randomized Clinical Trial.

JAMA Netw Open

October 2024

Stanford Center for Biomedical Informatics Research, Stanford University, Stanford, California.

Importance: Large language models (LLMs) have shown promise in their performance on both multiple-choice and open-ended medical reasoning examinations, but it remains unknown whether the use of such tools improves physician diagnostic reasoning.

Objective: To assess the effect of an LLM on physicians' diagnostic reasoning compared with conventional resources.

Design, Setting, And Participants: A single-blind randomized clinical trial was conducted from November 29 to December 29, 2023.

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Article Synopsis
  • Large language models (LLMs) in medicine struggle to express uncertainty, which hampers their integration into patient care, necessitating methods to quantify their confidence levels effectively.
  • The study evaluated different uncertainty proxies—confidence elicitation, token-level probability, and sample consistency—across multiple models including GPT3.5 and Llama3, using patient scenario datasets for assessment.
  • Sample consistency (SC) emerged as the best method for estimating uncertainty, particularly when used with reference cases for recalibration, while verbalized confidence was found to consistently overestimate the model's true confidence.
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Article Synopsis
  • Large language models (LLMs) have potential in breast cancer care decision-making but face challenges such as lack of source control, explainability, and health data security, which the small language model (SLM) aims to address through a tailored version (BC-SLM) for German guidelines.
  • The study evaluates the BC-SLM's accuracy and functionality using a multidisciplinary tumor board as the gold standard, comparing its treatment recommendations against ChatGPT3.5 and 4 through statistical analysis involving fictional patient profiles.
  • Results show that the BC-SLM achieved 86% concordance with the tumor board, similar to ChatGPT4 (90%) and slightly lower than ChatGPT3.5 (83%), indicating its initial effectiveness and adherence
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Article Synopsis
  • Oropharyngeal cancer (OPC) cases are rising, especially HPV-related ones, which generally have a better prognosis; however, the detection methods currently in use do not effectively differentiate between HPV-positive and HPV-negative cases, potentially leading to inappropriate treatment decisions.
  • Researchers utilized GeoMx digital spatial profiling to analyze gene expression in three OPC subtypes (p16+/HPV+, p16+/HPV-, and p16-/HPV-) from tumor samples to uncover these discrepancies.
  • The study found that certain genes associated with survival and proliferation were more active in p16-/HPV- tumors, while genes linked to immune response were elevated in p16+/HPV+ tumors, highlighting the need to further explore the implications of
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Background And Aims: Patient-reported outcomes (PROs) are vital in assessing disease activity and treatment outcomes in inflammatory bowel disease (IBD). However, manual extraction of these PROs from the free-text of clinical notes is burdensome. We aimed to improve data curation from free-text information in the electronic health record, making it more available for research and quality improvement.

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Abnormal DNA ploidy, found in numerous cancers, is increasingly being recognized as a contributor in driving chromosomal instability, genome evolution, and the heterogeneity that fuels cancer cell progression. Furthermore, it has been linked with poor prognosis of cancer patients. While next-generation sequencing can be used to approximate tumor ploidy, it has a high error rate for near-euploid states, a high cost and is time consuming, motivating alternative rapid quantification methods.

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Exploring the CIEDE2000 thresholds for lightness, chroma, and hue differences in dentistry.

J Dent

November 2024

Department of Optics, Faculty of Science, University of Granada, Campus Fuente Nueva, s/n 18071, Granada, Spain. Electronic address:

Objective: To evaluate the perceptibility and acceptability CIEDE2000 (K:K:K) thresholds for lightness, chroma and hue differences in dentistry.

Method: A Python-based program was developed to conduct a psychophysical experiment based on visual assessments of computer-simulated images of human teeth. The experiment was performed on a calibrated display.

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Importance: Large language model (LLM) artificial intelligence (AI) systems have shown promise in diagnostic reasoning, but their utility in management reasoning with no clear right answers is unknown.

Objective: To determine whether LLM assistance improves physician performance on open-ended management reasoning tasks compared to conventional resources.

Design: Prospective, randomized controlled trial conducted from 30 November 2023 to 21 April 2024.

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Background: The complex nature of rheumatic diseases poses considerable challenges for clinicians when developing individualized treatment plans. Large language models (LLMs) such as ChatGPT could enable treatment decision support.

Objective: To compare treatment plans generated by ChatGPT-3.

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There are large differences in premature mortality in the USA by race/ethnicity, education, rurality and social vulnerability index groups. Using existing concentration-response functions, published particulate matter (PM) air pollution estimates, population estimates at the census tract level and county-level mortality data from the US National Vital Statistics System, we estimated the degree to which these mortality discrepancies can be attributed to differences in exposure and susceptibility to PM. We show that differences in PM-attributable mortality were consistently more pronounced by race/ethnicity than by education, rurality or social vulnerability index, with the Black American population having the highest proportion of deaths attributable to PM in all years from 1990 to 2016.

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Perspectives on computational modeling of biological systems and the significance of the SysMod community.

Bioinform Adv

June 2024

Computational Systems Biology of Infections and Antimicrobial-Resistant Pathogens, Cluster of Excellence 'Controlling Microbes to Fight Infections', Institute for Bioinformatics and Medical Informatics (IBMI), Eberhard Karl University of Tübingen, Tübingen 72076, Germany.

Motivation: In recent years, applying computational modeling to systems biology has caused a substantial surge in both discovery and practical applications and a significant shift in our understanding of the complexity inherent in biological systems.

Results: In this perspective article, we briefly overview computational modeling in biology, highlighting recent advancements such as multi-scale modeling due to the omics revolution, single-cell technology, and integration of artificial intelligence and machine learning approaches. We also discuss the primary challenges faced: integration, standardization, model complexity, scalability, and interdisciplinary collaboration.

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