StayCurrentMD · #APSA50: Artificial Intelligence
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Podcast15 min·Published Jun 2019Older

#APSA50: Artificial Intelligence

With Dr. Michael Muelly · hosted by Dr. Alexander Gibbons

Chapter 1 of 10 · Fundamentals

Introduction

Introduction and Background

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What the experts said31 expert statements · 1 host summary
At the Radiological Society of North America annual meeting, there are about 100 to 150 AI startups presenting in the machine learning showcase, with some products available for purchase and deployed at healthcare systems.
EpidemiologicalMichael Muelly
Yale has deployed AI for prioritization of head CTs with bleeds, cutting down the time until a radiologist reviews the study.
ClinicalMichael Muelly
Most current AI applications in radiology are in the operational realm, augmenting workflow rather than making diagnostic decisions.
ClinicalMichael Muelly
Radiology jobs are here to stay despite AI advances.
OpinionMichael Muelly
AI applications in healthcare offer tremendous opportunity to achieve a truly evidence-based medical system.
OpinionMichael Muelly
What surgeons are taught during surgical training is what they will do in practice, and most of the time there is no evidence behind it, or the evidence is very weak.
ClinicalMichael Muelly
Laparoscopic surgery offers a natural opportunity for AI because it captures data digitally with video.
ClinicalMichael Muelly
Surgical robots are not currently using AI tools primarily for regulatory reasons, but will start to incorporate them once that hurdle is overcome.
OpinionMichael Muelly
Trauma triaging is currently done based on very simple rules and is not very data driven.
ClinicalMichael Muelly
AI impact on the actual operating room (outside of operational tasks) will take a lot longer, if it happens at all.
OpinionMichael Muelly
A simple sepsis alert system based on four criteria (elevated or low white count, temperature, heart rate) was rolled out at Penn State but failed because it was a simple rule set that went off all the time.
ClinicalMichael Muelly
With deep learning, sepsis alerts can be much more sophisticated, and some places like Emory have sepsis alerts deployed into the workflow.
ClinicalMichael Muelly
Deep learning requires very large datasets because the neural networks learn just by example and need many examples with good variety of the data space.
ClinicalMichael Muelly
In radiology, whether a GE or Siemens device is used may affect what the algorithm learns.
ClinicalMichael Muelly
The current limitation for AI in healthcare is access to very large datasets, especially compared to other domains where billions of data points are available daily.
ClinicalMichael Muelly
The more specific the disease or patient population (such as pediatric surgery), the harder it becomes to collect large, high-quality labeled datasets.
ClinicalMichael Muelly
Tesla has 100,000 to 200,000 cars driving around every day collecting data for training self-driving capability.
EpidemiologicalMichael Muelly
Waymo has collected about 10 million miles of driving experience for self-driving cars.
EpidemiologicalMichael Muelly
It is very difficult to generate large datasets in healthcare because data collection must fit into clinical workflow, cannot be easily simulated, and faces technical, organizational, and regulatory barriers.
ClinicalMichael Muelly
Deep learning models are very good at learning associations from images if given enough data, but they learn whatever association is present, including spurious ones.
ClinicalMichael Muelly
On CT scans, markers that exist outside the patient may tip the algorithm that the scan is from a particular hospital with different disease prevalence.
ClinicalMichael Muelly
Cloud-based data infrastructure is the way data centers in general and healthcare specifically will operate in the future, opening opportunities for access to larger datasets.
OpinionMichael Muelly
Once data is centralized in the cloud, it becomes much easier to create frameworks that allow data sharing between institutions for research purposes, while still maintaining access controls.
ClinicalMichael Muelly
A model trained on data in the US may not work anywhere else due to differences in patient populations.
ClinicalMichael Muelly
If there is any racial or ethnic bias in training data, the AI model will have that bias as well.
ClinicalMichael Muelly
Training a machine learning model is actually a very small part of what needs to be done to deploy AI in healthcare.
OpinionMichael Muelly
How the FDA will decide what is a safe medical device for AI applications remains an unsolved question.
ClinicalMichael Muelly
Even if AI models are not better than humans, they are much more consistent, which is their great promise.
OpinionMichael Muelly
There is huge variance between how different radiologists read studies, sometimes incorrectly and sometimes due to differences of opinion.
ClinicalMichael Muelly
Similar variance exists among ophthalmologists and applies anywhere humans make decisions, including pediatric surgery.
ClinicalMichael Muelly
The great opportunity for AI is reducing variance and providing consistent care according to current knowledge.
OpinionMichael Muelly
In melanoma image recognition, AI learned that the presence of a ruler in the picture was associated with malignancy.
Host summaryAlexander Gibbons summarizes what Dr. Michael Muelly said · not cited in answers