Xiaoqian Jiang, PhD, chair of the Department of Health Data Science and Artificial Intelligence at McWilliams School of Biomedical Informatics.
Xiaoqian Jiang, PhD, chair of the Department of Health Data Science and Artificial Intelligence at McWilliams School of Biomedical Informatics.

UTHealth Houston wins $6.4M NIH grant to develop deep learning model for Alzheimer’s

UTHealth Houston has been granted a $6.4 million fund by the National Institute on Aging for the next five years. The fund is intended to help develop an artificial intelligence approach to study the genetic factors related to Alzheimer’s disease. A team of researchers led by Zhongming Zhao, Ph.D., and Xiaoqian Jiang, Ph.D., both principal investigators and professors at McWilliams School of Biomedical Informatics in UTHealth Houston, are in the process of creating a deep-learning AI system. This system will link brain imaging with cell-specific genetic factors. To validate their AI models, the researchers will use neuroimaging and genetic data from Rush University Medical Center. They will also join the National Alzheimer’s Disease Sequencing Project AI/Machine Learning Consortium.

Zhao, who is also the director of the Center for Precision Health at McWilliams School of Biomedical Informatics, stated that this project will bridge the gap in Alzheimer's disease research between neuroimaging and genetic studies. Although there have been numerous computational analytical approaches published in each field, few can better address the link between neuroimaging and genetic data for a deeper understanding of the disease.

A significant amount of data related to molecular neuroimaging biomarkers and clinical information has already been generated in the context of Alzheimer's disease. However, researchers have not been able to connect many of the causal factors associated with the disease. To address this, scientists plan to use advanced machine-learning technology and an AI multimodality approach to group genetic and functional data. This will help to characterize the genetic risk of Alzheimer's disease. The researchers are calling this approach the "deep-learning brain" because it will focus on brain reading. The goal is to extend this model to the single-cell level, which will be called the "single-cell deep brain." This will allow for a more powerful way to dissect the genetic components of Alzheimer's disease.

To address the cognitive decline associated with Alzheimer's disease, researchers plan to integrate neuroimaging data into the deep-learning system. This will involve pairing distinct imaging features with genomic data to visualize their commonalities. Overall, the approach holds great promise for studying Alzheimer's disease and improving our understanding of this neurodegenerative disorder.

Researchers will use neuroimaging and genetic data from Rush University Medical Center, led by Christopher Gaiteri, PhD, assistant professor in the Department of Neurosciences, to validate their AI models. They will also collaborate with the national Alzheimer's Disease Sequencing Project AI/Machine Learning Consortium. The goal is to identify the link between genes and neuroimages to combine them into neuroimaging genetics, which can ultimately help explain the causes of cognitive decline in Alzheimer's disease. This understanding can help researchers and patients find better treatment options. The study's co-investigators are Paul Schulz, MD, a professor in the Department of Neurology at McGovern Medical School, and Kai Zhang, PhD, Yejin Kim, PhD, Yulin Dai, PhD, and Xiangning Chen, PhD, with McWilliams School of Biomedical Informatics. This research is funded by NIH grant U01AG079847.

CREDIT Brandon Baunach, Flickr (CC-BY 2.0, https://creativecommons.org/licenses/by/2.0/)
CREDIT Brandon Baunach, Flickr (CC-BY 2.0, https://creativecommons.org/licenses/by/2.0/)

The potential of ML in transforming cancer diagnosis, prevention in healthcare is immense

The utilization of machine learning in medicine has been a transformative development in many aspects. This innovative technology has enabled early detection of diseases and personalized treatment plans, pushing the boundaries of healthcare. In the field of cancer research, particularly in lung cancer screening, machine learning has once again taken center stage by simplifying and enhancing our understanding of who is at high risk.

Advancements in technology have always played a crucial role in improving patient care and outcomes in medicine. With the power of machine learning, there has been a significant breakthrough in assessing eligibility for lung cancer screening.

According to a recent study published on October 3rd in the open-access journal PLOS Medicine by Thomas Callender and colleagues from University College London, UK, a machine learning model equipped with data on age, smoking duration, and the number of cigarettes smoked per day can predict lung cancer risk and identify who needs lung cancer screening. Paper: https://journals.plos.org/plosmedicine/article?id=10.1371/journal.pmed.1004287 

Cancer of the lungs is the leading cause of cancer-related deaths worldwide. It is difficult to survive without early detection. By screening those at a high risk of developing lung cancer, deaths due to the disease can be reduced by 25%. However, it is unclear how to determine the high-risk population. The current standard-of-care model for determining lung cancer risk requires 17 variables, most of which are not readily available in electronic health records. 

In a recent study, researchers used data from the UK Biobank cohort (216,714 ever-smokers) and the US National Lung Screening Trial (26,616 ever-smokers) to develop new models of lung cancer risk. A machine learning model was used to predict a person's odds of developing and dying from lung cancer over the next five years, based on three predictors: people’s age, smoking duration and pack-years of smoking. The researchers tested the model on a third set of data from the US Prostate, Lung, Colorectal, and Ovarian Screening Trial. The model predicted lung cancer incidence and deaths with 83.9% and 85.5% sensitivity, respectively. All versions of the model had a higher sensitivity compared to currently used risk prediction formulas at an equivalent specificity.

Lung cancer remains the leading cause of cancer-related deaths worldwide. Detecting individuals at high risk is crucial for timely intervention and treatment. However, this process has traditionally been complicated and time-consuming, using multiple predictors and manual calculations.

Fortunately, parsimonious ensemble machine-learning models have simplified this approach. These models use just three key predictors to accurately determine an individual's eligibility for lung cancer screening.

The integration of machine learning in healthcare streamlines processes and improves accuracy by considering various factors such as age, smoking history, and family history of lung cancer. This enables healthcare professionals to prioritize resources efficiently and provide personalized care based on each patient's unique circumstances. 

Machine learning algorithms learn from vast amounts of data available through electronic health records and other sources, continually adapting their predictions over time. This ensures they stay up-to-date with the latest research findings without requiring constant manual adjustments.

With machine learning paving the way for simplified risk assessment in lung cancer screenings, more lives can potentially be saved through early detection and intervention strategies. Identifying those at high risk sooner allows healthcare providers to offer targeted preventive measures, such as smoking cessation programs or further diagnostic tests when necessary.

Callender adds, “We know that screening for those who have a high chance of developing lung cancer can save lives. With machine learning, we’ve been able to substantially simplify how we work out who is at high risk, presenting an approach that could be an exciting step in the direction of widespread implementation of personalized screening to detect many diseases early.”

While further refinement and validation of these models are necessary, machine learning holds great promise for revolutionizing cancer diagnosis and prevention in healthcare practices.

As technology advances in the medical field, we must embrace these innovations responsibly while prioritizing patient well-being. Machine learning provides the opportunity to transform how we approach lung cancer.

In conclusion, the integration of machine learning into healthcare improves efficiency and has the potential to save lives. We must continue investing in research and innovation to improve our understanding of lung cancer risk factors and enhance our ability to detect them early on. Through collaborative efforts between healthcare professionals, researchers, policymakers, and technology experts, we can hope for a future where fewer lives are cut short by this devastating illness.

Lloyd Minor and Fei-Fei Li
Lloyd Minor and Fei-Fei Li

Stanford reveals a responsible AI initiative, RAISE-Health

Responsible AI for Safe and Equitable Health will address ethical and safety issues in AI innovation, define standards for the field, and convene experts on the topic.

Responding to rapid advances in artificial intelligence and the urgent need to define its responsible use in health and medicine, Stanford Medicine and the Stanford Institute for Human-Centered Artificial Intelligence (HAI) today announced the launch of RAISE-Health (Responsible AI for Safe and Equitable Health). This pioneering initiative seeks to address critical ethical and safety issues surrounding AI innovation and help others navigate this complex and evolving field. 

Co-led by Stanford School of Medicine dean Lloyd Minor, MD, and Stanford HAI co-director and computer science professor Fei-Fei Li, Ph.D., the new initiative will establish a go-to platform for responsible AI in health and medicine; define a structured framework for ethical standards and safeguards; and regularly convene a diverse group of multidisciplinary innovators, experts and decision-makers on the topic.

Both awareness of AI and skepticism about its use in health care have skyrocketed in the last 12 months. According to a recent Pew survey, a majority of Americans said they would be uncomfortable with their provider using AI in their own health care, underscoring the crossroads at which society finds itself.

“AI has the potential to impact every aspect of health and medicine,” Minor said. “We have to act with urgency to ensure that this technology advances in line with the interests of everyonefrom the research bench to the patient bedside and beyond.”

The goals of the RAISE-Health initiative include enhancing clinical care outcomes through responsible integration of AI; accelerating research to solve the biggest challenges in health and medicine; and educating patients, care providers and researchers to navigate AI advances.

“AI is evolving at an incredible pace; so, too, must our capacity to manage, navigate and direct its path,” said Li, whose research includes a focus on ambient intelligence — using AI to monitor and respond to human activity in homes, hospitals, and other environments. “Through this initiative, we are seeking to engage our students, our faculty, and the broader community to help shape the future of AI, ensuring it reflects the interests of all stakeholders — patients, families, and society at large.”

Building on the goals of Stanford HAI, groundbreaking Stanford faculty research, and ongoing collaborations with policymakers and Silicon Valley innovators, RAISE-Health will be a trusted repository for the AI work being done at Stanford University, Stanford Medicine, and well beyond — hosting standards, tools, models, data, research, and best practices.

While AI offers the potential for transforming health globally, decision-makers must first address AI’s safety and ethical use to responsibly harness its full potential and build public trust in these systems.