Google AI, can predict cardiovascular problems by eye scan

By VARINDIA - 2019-09-07

Google AI, can predict cardiovascular problems by eye scan

This is the most forward moving step from the innovation of Google said, because the tech is not imitating an existing diagnostic but rather using machine learning to uncover a new way to predict health problems.Google AI has made a breakthrough: successfully predicting cardiovascular problems such as heart attacks and strokes simply from images of the retina, with no blood draws or other tests necessary.

 

This is a big step forward scientifically, Google AI officials said, because it is not imitating an existing diagnostic but rather using machine learning to uncover a surprising new way to predict these problems. What's more, the new system shows what parts of the eye image lead to successful predictions, giving researchers new leads into what causes cardiovascular disease.

 

Google and its health-tech arm Verily have found that Artificial Intelligence (AI) and Machine Learning (ML) could help identify signals of heart diseases through retinal images. "AI offers us the potential for new, less invasive tests for heart health -- predicting cardiovascular results from retinal images with computer vision -- encouraging early results!," Google CEO Sundar Pichai said. The results of the Google AI research could, "Prediction of Cardiovascular Risk Factors from Retinal Fundus Photographs via Deep Learning" in Nature Biomedical Engineering.



"Using deep learning algorithms trained on data from 284,335 patients, we were able to predict CV risk factors from retinal images with surprisingly high accuracy for patients from two independent data sets of 12,026 and 999 patients," Lily Peng, MD, product manager and a lead on these efforts within Google AI, wrote in the Google AI official blog.

 

"For example, our algorithm could distinguish the retinal images of a smoker from that of a non-smoker 71 percent of the time, compared to a ~50 percent (i.e. random) accuracy by human experts," she said. while doctors can typically distinguish between the retinal images of patients with severe high blood pressure and normal patients, Google AI's algorithm could go further to predict the systolic blood pressure within 11 mmHg on average for patients overall, including those with and without high blood pressure.

 

In addition to predicting the various risk factors – age, gender, smoking, blood pressure, etc. – from retinal images, Google AI's algorithm was fairly accurate at predicting the risk of a CV event directly. The algorithm used the entire image to quantify the association between the image and the risk of heart attack or stroke, Peng wrote.

 

"Given the retinal image of one patient who (up to 5 years) later experienced a major CV event (such as a heart attack) and the image of another patient who did not, our algorithm could pick out the patient who had the CV event 70 percent of the time," she said. "This performance approaches the accuracy of other CV risk calculators that require a blood draw to measure cholesterol."

 

This work may represent a new method of scientific discovery. Google AI's approach uses deep learning to draw connections between changes in the human anatomy and disease, akin to how doctors learn to associate signs and symptoms with the diagnosis of a new disease. This, she added, could help scientists generate more targeted hypotheses and drive a wide range of future research.


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