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Intel Software Development Tools Optimize Deep Learning Performance for Healthcare Imaging

This article was originally published at Intel's website. It is reprinted here with the permission of Intel.

The Deep Learning Deployment Toolkit from Intel helps deliver optimized inferencing on Intel® architecture, helping bring the power of AI to clinical diagnostic scanning and other healthcare workflows

Executive Summary

Deep learning and other forms of artificial intelligence (AI) offer exciting potential to streamline medical imaging work flows, enhance image quality, and increase the research value of imaging data. To deliver on the promise of AI-enhanced medical imaging, developers and other innovators must deploy their AI solutions on flexible platforms that provide high performance and scalability for deep learning innovations without driving up costs.

As part of its company-wide commitment to the AI revolution, Intel offers processors, tools, and frameworks for high-performance deep learning on cost- effective, general-purpose Intel® architecture. In addition to Intel® Xeon® Scalable processors and Intel® Solid State Drives, key technologies include Intel’s Deep Learning Deployment Toolkit and the Intel® Math Kernel Library for Deep Neural Networks (Intel® MKL-DNN). These technologies provide an easy way for innovators to deploy and integrate their deep learning models in optimal fashion on various Intel architectures from a variety of frameworks and training platforms. Using Intel architecture, developers can deliver their innovations without adding costs and complexity to the deployment environment.

Intel and GE Healthcare explored the Intel® technologies with one of GE’s deep learning image-classification solutions. They found that optimizing the trained GE solution with Intel’s Deep Learning Deployment Toolkit and Intel MKL-DNN improved throughput an average of 14 times over a baseline version of the solution and exceeded GE’s throughput goals by almost six times. These findings show a path to practical AI deployment for next-generation diagnostic scanners and a new era of smarter medical imaging.

Business Challenge: High-Performance Inferencing for Practical Deep Learning

Medical images are valuable in diagnosing a wide range of health issues, as well as planning treatment and assessing
its results. Aggregated with other sources of healthcare and demographic information, imaging data can also lead to novel insights that inspire next-generation treatment breakthroughs.

Deep learning and other forms of artificial intelligence (AI) offer exciting potential to improve medical imaging work flows and enhance medical imaging quality. Deep learning is a branch of AI and machine learning in which developers create mathematical and neural network models, and use vast amounts of data to “train” them to perform tasks such as recognizing and classifying medical images. Once a trained model is sufficiently accurate, it can be deployed with other algorithms as an “inference engine,” to evaluate and categorize real-world inputs from digital cameras and sensors.

Deep learning solutions with Intel® technologies are helping to deliver high-throughput inferencing in a variety of medical imaging use cases. For example, a development team from Zhejiang University’s School of Mathematics Sciences* and Zhejiang DE Image Solutions Co., Ltd.* developed a deep learning solution that is helping to improve thyroid cancer screening in China. The Intel® technology-based solution examines ultrasound images to identify and classify thyroid lesions.

China’s government is using an Intel technology-based deep learning solution to expand the capacity of its health system to detect two common causes of preventable blindness. Aier Eye Hospital Group*, China’s leading hospital network in eye care, worked with Medimaging Integrated Solutions* (MiiS*) to create the cloud-based solution, which runs on Intel® Xeon® Scalable processors and integrates deep learning inferencing capabilities with a handheld ophthalmoscope from MiiS.

For medical imaging AI solutions, the deployment architecture must deliver high inferencing throughput that keeps pace with busy radiology workflows, but doesn’t restrict exibility or add needless complexity and costs to the deployment environment. Training infrastructure is significantly different from inference infrastructure, and choosing a highly optimized inference infrastructure can offer significant speed-up in inference throughput.

Solution Overview: Deep Learning Deployment Toolkit from Intel

In addition to its powerful processors and solid state drives (SSDs), Intel offers tools for optimized inferencing on flexible, cost-effective Intel® architecture.

The Deep Learning Deployment Toolkit from Intel is a free set of tools that lets users optimize deep learning models
for faster execution on Intel® processors. The toolkit imports trained models from Caffe*, Theano*, TensorFlow*, and other popular deep learning frameworks regardless of the hardware platforms used to train the models. Developers can quickly integrate any trained deep learning model with application logic using a unified application programming interface (API). The toolkit maximizes inference performance by reducing the solution’s overall footprint and optimizing performance for the chosen Intel® architecture-based hardware.

The toolkit also enhances models for improved execution, storage, and transmission and enables seamless integration with application logic. Developers can also test and validate their models on the target hardware environment to confirm accuracy and performance. The result is an embedded- friendly inferencing solution with a small footprint and excellent performance for high-throughput deployment on industry-standard technologies.

Intel’s Deep Learning Deployment Toolkit includes the Intel® Math Kernel Library for Deep Neural Networks (Intel® MKL- DNN), a high-performance library designed to accelerate neural network primitives, increase application performance, and reduce development time on multiple generations of Intel processors. Intel MKL-DNN is also available as a standalone, open source package. The Deep Learning Deployment Toolkit is a component of the Intel® Computer Vision Software Development Kit.


Figure 1. Optimized models use the Deep Learning Deployment Toolkit from Intel and the Intel® Math Kernel Library for Deep Neural Networks (Intel® MKL-DNN) to deliver outstanding inferencing performance for practical deployment of AI solutions at the “edge” of the enterprise in clinical and research settings


Figure 2. The Intel® Xeon® processor E5-2650 exceeded GE’s inferencing performance target by nearly six times on four cores, and demonstrated steady, scalable performance for solutions needing more cores.

Putting Intel’s Inferencing Performance to the Test

GE Healthcare, a leading provider of medical imaging equipment and other healthcare technologies, worked with Intel to test inferencing performance for one of GE’s deep learning solutions. Developed by a team from GE Healthcare’s Computed Tomography (CT) scan division, the solution classifies and tags scanned image slices, making it easier to find relevant images and use them for research or clinical comparison. GE presented a paper on its AI anatomy classifier at the prestigious SPIE Medical Imaging 2018 Conference*. SPIE* is an international society advancing an interdisciplinary approach to the science and application of light.

GE’s CT imaging specialists had developed and trained their new AI-based model using the Python* programming language and open source software, including the TensorFlow and Keras* libraries for deep learning. Collaborating with some of Intel’s AI-optimization experts, they used Intel’s Deep Learning Deployment Toolkit to set up and optimize the solution for the Intel technology environment and test the solution’s performance. Reflecting the need for cost-effective inference performance, the CT experts set a target of classifying 100 images per second using no more than four dedicated cores of an Intel® Xeon® processor.

The solution ran on a system powered by the Intel® Xeon® processor E5-2650 v4 at 2.20GHz, and configured with 264 GB of memory, an Intel® Solid State Drive Data Center 480 GB, and CentOS Linux* 7.4.1708. The system ran at Intel’s Datacenter Health and Life Sciences Lab in Hillsboro, Oregon, and used a privacy-protected data set of 8,834 CT scan images.

The results were impressive. The optimized codes produced by Intel’s Deep Learning Development Toolkit and Intel MKL-DNN improved inferencing throughput an average of 14 times over the baseline TensorFlow model running on the same system, and easily met GE’s performance target. In fact, a single core of the Intel Xeon processor E5-2650 ran nearly 150 percent faster than GE’s performance target, and four cores of the processor exceeded GE Healthcare’s goal by nearly six times (see Figure 2). Intel benchmarks show the new Intel® Xeon® Platinum 8180 processor delivering up to 2.4 times higher performance for a range of AI workloads compared to the previous generation.

“We want to keep deployment costs down for our customers, so we need the performance and exibility to run a whole range of AI and imaging processing tasks in a variety of clinical environments,” said David Chevalier, principal engineer, GE Healthcare. “We think using general-purpose processors, tools, and frameworks from Intel can o er a cost-e ective way to leverage AI in medical imaging in new and meaningful ways.”

Flexible Deployment

By delivering excellent inferencing performance on just a handful of CPU cores, Intel Xeon processors and Deep Learning Deployment Toolkit can enable innovators such as GE Healthcare to run one or more AI solutions at high performance on the same cost-effective edge-server infrastructure that handles local image-processing tasks such as reconstruction, registration, segmentation, and noise reduction. AI developers can take advantage of Intel’s performance-tuned frameworks and tools to deploy their inferencing solutions on Intel architecture regardless of the development and training environment they used.

CPU-based inferencing on Intel processors also offers innovators such as GE the exibility to change where inferencing occurs. While medical imaging AI deployments currently run in inferencing appliances at the on-premise server, next-generation inferencing can move to an on-premise or off-premise cloud or into the scanner itself (Figure 3).


Figure 3. Running on Intel® processors gives AI innovators the exibility to deploy inferencing capabilities in diagnostic imaging equipment, on-premises infrastructure, or secure external clouds.

Conclusion

With high inferencing throughput on flexible Intel architecture, innovators such as GE Healthcare move closer to delivering practical medical imaging solutions that use deep learning and other forms of AI to improve image quality, diagnostic capabilities, and clinical workflows.

Find the solution that is right for your organization. Contact your Intel representative or visit intel com/healthcare.

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