• Login
    • Join
  • FOLLOW:
  • Subscribe Free
    • Magazine
    • eNewsletter
    Checkout
    • Magazine
    • News
    • Opinions
    • Top 30
    • Research
    • Supply Chain
    • Device Sectors
    • Directory
    • Events
    • Resources
    • Microsites
    • More
  • Magazine
  • News
  • Opinions
  • Top 30
  • Research
  • Supply Chain
  • Device Sectors
  • Directory
  • Events
  • Resources
  • Microsites
  • Current / Back Issues
    Features
    Editorial
    Digital Edition
    eNewsletter Archive
    Our Team
    Editorial Guidelines
    Reprints
    Subscribe Now
    Advertise Now
    Top Features
    Pharmaceutical Focus: A Look at Combination Products

    The Printed World: Additive Manufacturing in Medtech

    The Lost Year: 2020 Year in Review

    Extrusion Evolution

    Little Big Parts: Micromolding Under the Microscope
    OEM News
    Supplier News
    Service / Press Releases
    Online Exclusives
    Press Releases
    People in the News
    Product & Service Releases
    Supplier News
    Medtech Makers
    Technical Features
    International News
    Videos
    Product & Service Releases
    Live From Shows
    Top News
    Butterfly Network Appoints New Leader

    BD Names Chairman of Board

    Interplex Acquires OCP Group

    FDA Clears a Portable Hemodialysis System

    Solid Growth Forecast for India's HER2 Amplification Tests Market
    From the Editor
    Blogs
    Guest Opinions
    Top Opinions
    Pharmaceutical Focus: A Look at Combination Products

    The Printed World: Additive Manufacturing in Medtech

    The Lost Year: 2020 Year in Review

    Extrusion Evolution

    Little Big Parts: Micromolding Under the Microscope
    Top 30 Medical Device Companies
    Market Data
    White Papers
    Top Research
    Fixing Face Mask Form and Function

    The Heart of the Matter: Trends in Cardiology

    Virtually the Same? The Challenges of Online Conferences

    Digital Health Delivers During a Year for the Ages

    Advanced Technology for Staking and Swaging Medical Plastics
    3D/Additive Manufacturing
    Contract Manufacturing
    Electronics
    Machining & Laser Processing
    Materials
    Molding
    Packaging & Sterilization
    R&D & Design
    Software & IT
    Testing
    Tubing & Extrusion
    Cardiovascular
    Diagnostics
    Digital Health
    Neurological
    Patient Monitoring
    Surgical
    Orthopedics
    All Companies
    Categories
    Company Capabilities
    Add New Company
    Outsourcing Directory
    Unicep

    Creganna Medical, part of TE Connectivity

    Element

    Concise Engineering

    FUTEK Advanced Sensor Technology Inc.
    MPO Summit
    Industry Events
    Webinars
    Live From Show Event
    Industry Associations
    Videos
    Career Central
    eBook
    Slideshows
    Top Resources
    Meeting Critical Ventilator Product Requirements Amid Pandemic

    Impact of COVID-19 on the Medtech Supply Chain

    Finding the Upside to a Challenging Year

    Preparing Your Design Controls for FDA Approval

    A 'Trial and Error' Approach to Micromolded Parts
    Companies
    News Releases
    Product Releases
    Press Releases
    Product Spec Sheets
    Service Releases
    Case Studies
    White Papers
    Brochures
    Videos
    Outsourcing Directory
    K-Tube Technologies

    Unicep

    Concise Engineering

    PTI Engineered Plastics Inc.

    MW Life Sciences
    • Magazine
      • Current/Back Issues
      • Features
      • Editorial
      • Columns
      • Digital Editions
      • Subscribe Now
      • Advertise Now
    • News
    • Directory
      • All Companies
      • ALL CATEGORIES
      • Industry Associations
      • Company Capabilities
      • Add Your Company
    • Supply Chain
      • 3D/Additive Manufacturing
      • Contract Manufacturing
      • Electronics
      • Machining & Laser Processing
      • Materials
      • Molding
      • Packaging & Sterilization
      • R&D & Design
      • Software & IT
      • Testing
      • Tubing & Extrusion
    • Device Sectors
      • Cardiovascular
      • Diagnostics
      • Digital Health
      • Neurological
      • Patient Monitoring
      • Surgical
      • Orthopedics
    • Top 30 Company Report
    • Expert Insights
    • Slideshows
    • Videos
    • Podcasts
    • Resources
    • eBook
    • Infographics
    • Whitepapers
    • Research
      • White Papers
      • Case Studies
      • Product Spec Sheets
      • Market Data
    • MPO Summit
    • Events
      • Industry Events
      • Live From Show Events
      • Webinars
    • Microsite
      • Companies
      • Product Releases
      • Product Spec Sheets
      • Services
      • White Papers / Tech Papers
      • Press Releases
      • Videos
      • Literature / Brochures
      • Case Studies
    • About Us
      • About Us
      • Contact Us
      • Advertise with Us
      • eNewsletter Archive
      • Privacy Policy
      • Terms of Use
    Online Exclusives

    How to Improve ECG Rhythm Recognition Using a DCNN

    Comparing and contrasting methods of quality enhancement.

    How to Improve ECG Rhythm Recognition Using a DCNN
    Related CONTENT
    • Biotech Team Develops ELISA Protocol for COVID-19 Antibody Detection
    • Unique Contact Lens Sensor System & Manufacturing Process Developed
    • Researchers Receive Funding to Develop Smart Vaccine Device
    • Nanosilica Filled, Electrically Insulative Epoxy Features Abrasion Resistance
    • Researchers Develop New Combined Process for 3D Printing
    Sergey Kuznetsov, Software Engineer, Auriga07.06.20
    Recently, I published a piece on recognizing ECG rhythms using a deep convolutional neural network (DCNN). The article argues that the reliable recognition of certain heart rhythm pathologies can be performed based on the monitored recordings of two to three patients with that pathology. In this article, the same DCNN and data were used to demonstrate that recognition can be improved by both neural network reconfiguration and input data enhancement.
     
    This article describes three methods of quality enhancement I have investigated:
     
    • Data split interval adjustment.
    • The “transfer learning” method.
    • Balancing classes.
     
    The transfer learning method is based on the assumption that the features of a neural network that have been trained to extract data from a large bulk of data labeled for a task would be suitable for solving another task, usually with less data. Before reducing the number of trainings, the weights for the final layers are cleared. When there is a task that has a different number of classes, the parameters of the final layer are changed.
     
    The task in the review used the same 16-layer convolutional neural network and the same freely available ECG data from one lead (mitdb) discussed in the previous article. Additionally, the labeled data of the 2017 competition published on physionet.org was used where training was held for four classes on ECG implementations lasting 9–60 seconds. For the possibility of joint use, the source data (360 samples per second) were resampled into the input rate of additional data (300 samples per second).
     
    The following describes the application of the three abovementioned methods of input data enhancement for the two versions of the classification task discussed in the previous article (with/without the separation of training data and test data). The version without separation used methods (1) and (2). For the separation option, methods (1), (2), and (3) were used.
     
    1. Data Split Interval Adjustment
    As expected, splitting data into five-second intervals instead of 10-second intervals (method 1) led to a relative decrease in the quality of recognition of atrial fibrillation (AFIB); however, previously unrecognized NOD and IVR rhythms were added. This can be explained by a decrease in data snippet losses, which is particularly important for classes with a small amount of data. The overall index for "ranking-based average precision" (RBAP) increased from 0.968 to 0.975.
     
    Reducing the length of the implementation at the input of the neural network led to its inoperability. This was offset by changing the parameters of the first layer (1D-convolution): the size of the convolution kernel was halved and the stride was reduced from three to two.
     
    To improve the result, “transfer learning” (method 2) with a variable number of erasable layers was implemented. RBAP increased to 0.984 and in this case, it was optimal to erase the weights of not only one or two layers but 10–13 out of the 16 layers (Figure 1).


    Figure 1.

    2. The “Transfer” Learning Method
    Leaping ahead, this “fair and square” option is the only valuable one for practical use. Splitting data into five-second intervals (method 1) resulted in IVR rhythm recognition addition and an RBAP increase from 0.804 to 0.826. The method of “transfer learning” (method 2) with the erasure of the weights of ten layers (optimal for this option) added AFL rhythm recognition and RBAP was increased to 0.885.
     
    Significant results were only obtained for six recognizable rhythm classes using “learning transfer”; these are presented in Table 1:
     
    Classification report   Confusion matrix
    Precision Recall f1-score support rhythm N AFIB P B AFL IVR
    0.98 0.98 0.98 342 N 334 8 0 0 0 0
    0.90 0.83 0.86 260 AFIB 4 215 0 1 40 0
    1.00 0.99 1.00 638 P 0 1 632 0 0 5
    0.96 0.83 0.89 58 B 0 0 0 48 0 1
    0.76 0.95 0.84 132 AFL 0 0 0 1 125 0
    0.87 0.95 0.91 42 IVR 2 0 0 0 0 40
     
    0.95 1472 Accuracy
    0.91 0.92 0.91 1472 Macro average
    0.95 0.95 0.95 1472 Weighted average
    0.973       Ranking-based average precision (RBAP)

    3. Balancing Classes
    The attempt to use all realizations (nine rhythm classes) that resulted from splitting data for training and to use the alignment of classes by the number of copies previously used by decimation was unsuccessful; the significant differences in class capacities may be to blame. Both direct data processing and an indication of the weight coefficients of the classes inverse to the class power were tested (method 3). However, both options yielded worse results than equalizing class capacities, with the only the rather uninteresting exception of when neither “learning transfer” nor class weights were used.
     
    Thus, in the option described above where data is split into five-second intervals, the power of classes is aligned during training and using the “transfer learning” method becomes the best option.
     

    Sergey Kuznetsov is a software engineer at Auriga.
    Related Searches
    • Cardiovascular
    Related Knowledge Center
    • Cardiovascular
    Suggested For You
    Biotech Team Develops ELISA Protocol for COVID-19 Antibody Detection Biotech Team Develops ELISA Protocol for COVID-19 Antibody Detection
    Unique Contact Lens Sensor System & Manufacturing Process Developed Unique Contact Lens Sensor System & Manufacturing Process Developed
    Researchers Receive Funding to Develop Smart Vaccine Device Researchers Receive Funding to Develop Smart Vaccine Device
    Nanosilica Filled, Electrically Insulative Epoxy Features Abrasion Resistance Nanosilica Filled, Electrically Insulative Epoxy Features Abrasion Resistance
    Researchers Develop New Combined Process for 3D Printing Researchers Develop New Combined Process for 3D Printing
    Innovative Health Obtains Patent for Microlumen Reprocessing Technology Innovative Health Obtains Patent for Microlumen Reprocessing Technology
    CRISPR-Based COVID-19 Test Uses Smartphone Camera CRISPR-Based COVID-19 Test Uses Smartphone Camera
    Increasing Comfort for Chemotherapy Patients Increasing Comfort for Chemotherapy Patients
    The Big Challenges of Medical Device Miniaturization The Big Challenges of Medical Device Miniaturization
    Vygon, Oncomfort Partner to Commercialize Virtual Reality Pain Relief Device Vygon, Oncomfort Partner to Commercialize Virtual Reality Pain Relief Device
    Pharmaceutical Focus: A Look at Combination Products Pharmaceutical Focus: A Look at Combination Products
    The Printed World: Additive Manufacturing in Medtech The Printed World: Additive Manufacturing in Medtech
    The Lost Year: 2020 Year in Review The Lost Year: 2020 Year in Review
    Quality Assurance When Supply Chain Disruptions Arise Quality Assurance When Supply Chain Disruptions Arise
    Imec Developing Five Minute COVID Test Imec Developing Five Minute COVID Test

    Related Online Exclusives

    • Cardiovascular | Surgical
      Prospects of AIMDs in the Implantable Medical Device Industry

      Prospects of AIMDs in the Implantable Medical Device Industry

      Active implantable medical devices (AIMDs) are a significant player in the medical implant market.
      Sunil Jha, Research Content Developer, Global Market Insights 11.18.20

    • Cardiovascular
      Examining the State of the Pacemaker Industry

      Examining the State of the Pacemaker Industry

      The advent of FDA-cleared MRI pacemakers is a significant trend.
      Sunil Jha, Research Content Developer, Global Market Insights 02.21.20

    • Cardiovascular | Diagnostics | Patient Monitoring
      Ladies First: An Examination of the Women

      Ladies First: An Examination of the Women's Health Device Industry

      Economic burden for women's diseases tops $500 billion, but women’s health makes up about 4 percent of total R&D funding for healthcare products and services.
      Hrishikesh Kadam, Research Content Developer, Global Market Insights (GMI) 12.11.19


    • Cardiovascular
      Using ECG to Diagnose Cardiovascular Disease

      Using ECG to Diagnose Cardiovascular Disease

      How to turn raw data into results.
      Sergey Kuznetsov, Software Engineer, Auriga 10.16.19

    • Cardiovascular | Surgical
      CRM Device Demand Soars Amid Surging Cardiovascular Disease Prevalence

      CRM Device Demand Soars Amid Surging Cardiovascular Disease Prevalence

      Estimates claim the cardiac rhythm management industry's size to reach $13.7 billion by 2025.
      Paroma Bhattacharya, Research Content Developer, Global Market Insights 10.15.19

    • Cardiovascular | Digital Health | Software & IT | Surgical
      Gaming Through Surgery: Apps Prepare Clinicians for Challenging Cases

      Gaming Through Surgery: Apps Prepare Clinicians for Challenging Cases

      A video game app can be leveraged to introduce healthcare professionals to challenging procedures for a variety of clinical application areas.
      Sean Fenske, Editor-in-Chief 08.08.19


    • 3D/Additive Manufacturing | Cardiovascular
      3D Printing in the Medical Technology Industry: An Economic Case

      3D Printing in the Medical Technology Industry: An Economic Case

      A look at final part cost variables reveals additive manufacturing can be an efficient solution for many medtech applications, but only if approached correctly.
      Matt Sand, President, 3DEO 05.30.19

    • Cardiovascular | Contract Manufacturing | Electronics | Molding | Patient Monitoring
      Staying Dry: Waterproofing a Heart Monitor

      Staying Dry: Waterproofing a Heart Monitor

      Comar resolves market growth needs for the myPatch sl Holter recorder while enhancing design and addressing specific demands.
      Adrian Possumato, Principal Consultant, Medica Consulting 05.21.19

    • Cardiovascular
      Meeting Cardiac Stent Market Needs

      Meeting Cardiac Stent Market Needs

      Biotronik's PK Papyrus device was developed to provide physicians with a reliable covered stent that can be quickly deployed.
      Michael Barbella, Managing Editor 04.04.19


    • Cardiovascular
      Room for Improvement in Cardiac Stent Development

      Room for Improvement in Cardiac Stent Development

      Less-than-optimal outcomes will drive future growth in the global stent market.
      Michael Barbella, Managing Editor 03.29.19

    • Cardiovascular | Packaging & Sterilization | Surgical
      Why Does Medtech Rely on Metal Finishing?

      Why Does Medtech Rely on Metal Finishing?

      What is so important about using a metal finish, at least when it comes to cleanliness and sterilization?
      Megan Ray Nichols, Science Writer; Editor, Schooled By Science 03.20.19

    • Cardiovascular | Software & IT
      Special Considerations for Automatic Defibrillator Development and Algorithm Optimization

      Special Considerations for Automatic Defibrillator Development and Algorithm Optimization

      ...
      Alexander Naumov and Anastasia Lebedeva, Software Engineers, Auriga Inc. 02.28.19


    • Cardiovascular | Electronics | Surgical
      Reducing the Noise Impact of Medical Devices

      Reducing the Noise Impact of Medical Devices

      Diaphragm pumps can be particularly troublesome when it comes to unwanted noise in a point-of-care device.
      Jamie Campbell, Product Manager, Parker Precision Fluidics 01.07.19

    • Cardiovascular | Surgical | Tubing & Extrusion
      Film-Cast Tubing Specifications Used in Catheter-Based Medical Devices

      Film-Cast Tubing Specifications Used in Catheter-Based Medical Devices

      Film-cast tubing is not extruded tubing, so knowing the differences is critical for ensuring successful definition of its specifications.
      Brett Steen, Engineering Consultant 01.07.19

    • Cardiovascular | Neurological | Surgical
      The YouTube for Healthcare

      The YouTube for Healthcare

      VuMedi is a video platform that exclusively caters to medical professionals, physicians, and the healthcare industry.
      Sean Fenske, Editor-in-Chief 12.05.18


    Trending
    • Senseonics Forges Strategic Collaboration With Ascensia Diabetes Care
    • Portable, Home-Use Device Quickly Measures Inflammation Levels
    • Top 10 Trends In The Medical Device And Equipment Industry
    • Masimo Earns CE Mark For New Fingertip Pulse Oximeter
    • At-Home COVID-19 Test Kits Boosts Disease Monitoring Capabilities
    Breaking News
    • Butterfly Network Appoints New Leader
    • BD Names Chairman of Board
    • Interplex Acquires OCP Group
    • FDA Clears a Portable Hemodialysis System
    • Solid Growth Forecast for India's HER2 Amplification Tests Market
    View Breaking News >
    CURRENT ISSUE

    November/December 2020

    • Pharmaceutical Focus: A Look at Combination Products
    • The Printed World: Additive Manufacturing in Medtech
    • The Lost Year: 2020 Year in Review
    • View More >

    Cookies help us to provide you with an excellent service. By using our website, you declare yourself in agreement with our use of cookies.
    You can obtain detailed information about the use of cookies on our website by clicking on "More information”.

    • About Us
    • Privacy Policy
    • Terms And Conditions
    • Contact Us

    follow us

    Subscribe
    Nutraceuticals World

    Latest Breaking News From Nutraceuticals World

    Omega-3s Evidenced to Reduce Low-Grade Inflammation in Elderly Men
    MIND and Mediterranean Diets Linked to Later Onset of Parkinson’s Disease
    Kerry Launches Web-Based Tool for Plant-Based Formulation Challenges
    Coatings World

    Latest Breaking News From Coatings World

    Keyland Polymer UV Powder, LLC Launches UVMax Defender
    Scott McLaughlin to Race in PPG Colors During Rookie INDYCAR Season
    Vink Chemicals Offers parmetol PSG
    Medical Product Outsourcing

    Latest Breaking News From Medical Product Outsourcing

    Butterfly Network Appoints New Leader
    BD Names Chairman of Board
    Interplex Acquires OCP Group
    Contract Pharma

    Latest Breaking News From Contract Pharma

    Adare Pharma Solutions Opens New Small-Scale Lab
    Stevanato Group Launches After-sales Service Offering
    X-Chem Acquires IntelliSyn and AviSyn
    Beauty Packaging

    Latest Breaking News From Beauty Packaging

    The Estée Lauder Companies Announces Game-Changing Sustainability Goals for Travel Retail
    Aura Introduces Customizable Hair Care
    Corpack Creates Custom Packaging for Marlies Möller Hair Care Line
    Happi

    Latest Breaking News From Happi

    Nice-Pak Receives EPA Approval for Disinfectant Wipes
    FDA Takes Major Action on Hand Sanitizers from Mexico
    Symrise Shares 2020 Sales Figures
    Ink World

    Latest Breaking News From Ink World

    Epson Partner Creates Label Applicators for Pharmaceutical Products
    Smurfit Kappa Sets New Sustainability Targets with Better Planet 2050
    Paragon Expands Direct Mail Capabilities with Ricoh Pro VC70000
    Label & Narrow Web

    Latest Breaking News From Label & Narrow Web

    Great Lakes Label debuts new website
    Epson partner creates label applicators for pharmaceutical products
    ACTEGA removes chemicals from laminating adhesives
    Nonwovens Industry

    Latest Breaking News From Nonwovens Industry

    American Made Production Equipment for Mask Manufacturers
    Kimberly-Clark Releases Q4, Full Year Results
    Freudenberg to Establish Apparel Interlining Competence Centers
    Orthopedic Design & Technology

    Latest Breaking News From Orthopedic Design & Technology

    Spinal Elements' Lucent XP-Curved Expandable TLIF Gains FDA Nod
    FDA OKs OrthoSpin's 2nd Gen Robotic, Digital External Fixation System
    Nextremity Solutions Enters Supply Agreement with Fort Wayne Metals
    Printed Electronics Now

    Latest Breaking News From Printed Electronics Now

    North American Semiconductor Equipment Industry Posts December 2020 Billings
    First Solar Signs Definitive Agreement to Sell US Development Platform to Leeward
    PRINTING United Alliance Announces TAGA Presents Virtual Event

    Copyright © 2021 Rodman Media. All rights reserved. Use of this constitutes acceptance of our privacy policy The material on this site may not be reproduced, distributed, transmitted, or otherwise used, except with the prior written permission of Rodman Media.

    AD BLOCKER DETECTED

    Our website is made possible by displaying online advertisements to our visitors.
    Please consider supporting us by disabling your ad blocker.


    FREE SUBSCRIPTION Already a subscriber? Login