• Skip to primary navigation
  • Skip to main content
  • Skip to primary sidebar
  • Skip to footer

SAGES

Reimagining surgical care for a healthier world

  • Home
    • COVID-19 Annoucements
    • Search
    • SAGES Home
    • SAGES Foundation Home
  • About
    • Who is SAGES?
    • SAGES Mission Statement
    • Advocacy
    • Strategic Plan, 2020-2023
    • Committees
      • Request to Join a SAGES Committee
      • SAGES Board of Governors
      • Officers and Representatives of the Society
      • Committee Chairs and Co-Chairs
      • Full Committee Rosters
      • SAGES Past Presidents
    • Donate to the SAGES Foundation
    • Awards
      • George Berci Award
      • Pioneer in Surgical Endoscopy
      • Excellence In Clinical Care
      • International Ambassador
      • IRCAD Visiting Fellowship
      • Social Justice and Health Equity
      • Excellence in Community Surgery
      • Distinguished Service
      • Early Career Researcher
      • Researcher in Training
      • Jeff Ponsky Master Educator
      • Excellence in Medical Leadership
      • Barbara Berci Memorial Award
      • Brandeis Scholarship
      • Advocacy Summit
      • RAFT Annual Meeting Abstract Contest and Awards
  • Meetings
    • NBT Innovation Weekend
    • SAGES Annual Meeting
      • 2023 Scientific Session Call For Abstracts
      • 2023 Emerging Technology Call For Abstracts
    • CME Claim Form
    • Industry
      • Advertising Opportunities
      • Exhibit Opportunities
      • Sponsorship Opportunities
    • Future Meetings
    • Past Meetings
      • SAGES 2022
      • SAGES 2021
    • Related Meetings Calendar
  • Join SAGES!
    • Membership Benefits
    • Membership Applications
      • Active Membership
      • Affiliate Membership
      • Associate Active Membership
      • Candidate Membership
      • International Membership
      • Medical Student Membership
    • Member News
      • Member Spotlight
      • Give the Gift of SAGES Membership
  • Patients
    • Healthy Sooner – Patient Information for Minimally Invasive Surgery
    • Patient Information Brochures
    • Choosing Wisely – An Initiative of the ABIM Foundation
    • All in the Recovery: Colorectal Cancer Alliance
    • Find a SAGES Member
  • Publications
    • SAGES Stories Podcast
    • SAGES Clinical / Practice / Training Guidelines, Statements, and Standards of Practice
    • Patient Information Brochures
    • TAVAC – Technology and Value Assessments
    • Surgical Endoscopy and Other Journal Information
    • SAGES Manuals
    • SCOPE – The SAGES Newsletter
    • COVID-19 Annoucements
    • Troubleshooting Guides
  • Education
    • OpiVoid.org
    • SAGES.TV Video Library
    • Safe Cholecystectomy Program
      • Safe Cholecystectomy Didactic Modules
    • Masters Program
      • SAGES Facebook Program Collaboratives
      • Acute Care Surgery
      • Bariatric
      • Biliary
      • Colorectal
      • Flexible Endoscopy (upper or lower)
      • Foregut
      • Hernia
      • Robotics
    • Educational Opportunities
    • HPB/Solid Organ Program
    • Courses for Residents
      • Advanced Courses
      • Basic Courses
    • Video Based Assessments (VBA)
    • Robotics Fellows Course
    • MIS Fellows Course
    • Facebook Livestreams
    • Free Webinars For Residents
    • SMART Enhanced Recovery Program
    • SAGES OR SAFETY Video
    • SAGES at Cine-Med
      • SAGES Top 21 MIS Procedures
      • SAGES Pearls
      • SAGES Flexible Endoscopy 101
      • SAGES Tips & Tricks of the Top 21
  • Opportunities
    • NEW-Area of Concentrated Training Seal (ACT)-Advanced Flexible Endoscopy-Coming Soon!
    • SAGES Fellowship Certification for Advanced GI MIS and Comprehensive Flexible Endoscopy
    • Multi-Society Foregut Fellowship Certification
    • SAGES Research Opportunities
    • Fundamentals of Laparoscopic Surgery
    • Fundamentals of Endoscopic Surgery
    • Fundamental Use of Surgical Energy
    • Job Board
    • SAGES Go Global: Global Affairs and Humanitarian Efforts
  • Search
    • Search All SAGES Content
    • Search SAGES Guidelines
    • Search the Video Library
    • Search the Image Library
    • Search the Abstracts Archive
  • Store
    • “Unofficial” Logo Products
  • Log In

Real-time, endoscopic tissue perfusion monitoring by a snapshot hyper-spectral imager

Aaron Sun1, Jung-Man Namgoong, MD2, Peter Kim, MD, PhD3, Jaepyeong Cha, PhD3. 1Princeton University, 2Asan Medical Center, 3Children’s National Health System

Objective: Real-time anatomic display of tissue perfusion, vascularity and ischemia in the tissue of interests during surgery is critical and necessary for improvements in technical and cognitive decisions. Snapshot hyperspectral imaging (HSI) has advantages over conventional multispectral imaging methods because of its fast image acquisition of all spectral bands, making it more useful for real-time surgical application. This technology has not been introduced to laparoscopic surgery. Herein, we demonstrate a working algorithm that differentiates between regions of high and low oxygen saturation providing real-time processing and display using a snapshot HSI.

Description: We incorporated a snapshot hyperspectral imager with a standard RGB endoscope. Light reflecting off from the target tissues enters the snapshot hyperspectral imager through the endoscope and the resulting hyperspectral images are de-mosaic and processed by using a custom program routine to determine relative tissue oxygen saturation levels. In vivo ischemic conditions were created in sections of rat bowels by suture ligation or clamping of the vessels. Tissue perfusion was imaged and monitored over the course of time up to an hour. 

Results: The endoscopic snapshot hyperspectral imaging system ( in Figure 1) processed images at a video frame rates of approximately 24 frames per second. Figures 2 and 3 illurtrate  representative  image frames acquired at the end of each experiment before and after image processing.  Figure 2 shows an RGB image of the target bowel tissue regions acquired using the hyperspectral color compsensation from the same hyperspectral imager, while Figure 3 shows the resulting heatmap of the tissue perfusion image where the higher oxygen saturation levels are in yellow and lower levels are in blue.

Figure 1: System implementation of the Endoscopic HSI Figures 2&3: An RGB image and the resulting oxygen saturation map

We then analyzed the relative oxygen saturation levels in both healthy and clamped regions of tissue over the course of one hour (Figure 4). Oxygen levels in the healthy region remained relatively constant over the course of the time period whereas oxygen saturation in the clamped regions dropped more than 20% within 30 minutes. 

Figure 4: Oxygen saturation levels of healthy and clamped tissues over one hour

Conclusions and Future Directions: Using a snapshot hyperspectral endoscopic imaging, we were able to differentiate between ischemic and healthy regions. Additionally, we were able to measure the relative mean oxygen saturation levels in each section of tissue. We are currently refining the algorithm using machine learning for image analysis to improve both accuracy and processing speed. This technique can be useful especially in post-operation recovery without complication. This real-time imaging and display can greatly help perform surgery such as organ transplantation or gastro-intestinal surgery in the future.


Presented at the SAGES 2017 Annual Meeting in Houston, TX.

Abstract ID: 91140

Program Number: ETP860

Presentation Session: Emerging Technology iPoster Session (Non CME)

Presentation Type: Poster

130

Share this:

  • Twitter
  • Facebook
  • LinkedIn
  • Pinterest
  • WhatsApp
  • Reddit

Related

« Return to SAGES 2018 abstract archive

Our Mission

Innovate, educate and collaborate to improve patient care.

Recently, on SAGES…

Critical View of Safety (CVS) Challenge QR Code

The SAGES Critical View of Safety Challenge – Donate Your Lap Chole Videos!

The Society of American Gastrointestinal and Endoscopic Surgeons is hosting the first Artificial Intelligence Data Challenge conducted by surgeons. The aim of this challenge is to generate a large and diverse dataset of laparoscopic cholecystectomy videos, annotated with respect to the subcomponents of the Critical View of Safety (CVS). Computer scientists from all over the […]

Respuesta de SAGES al Estudio NordICC sobre el beneficio de las colonoscopias de detección

SAGES desea aclarar los resultados del estudio NordICC y colocarlos en contexto de los esfuerzos de varias agencias nacionales para reducir el riesgo de cáncer colorrectal – la segunda causa de muerte por cáncer más frecuente en los Estados Unidos-, mediante la promoción de la detección y tratamiento oportuno de las lesiones.

SAGES Response to NordICC Study Regarding Benefit of Screening Colonoscopies

The NordICC Study recently published in The New England Journal of Medicine and widely reported on by media outlets has raised questions regarding the benefit of screening colonoscopy in lowering the risk of colorectal cancer and cancer-related deaths among otherwise healthy and symptom-free men and women aged 55 to 64. Provocative headlines and commentaries have […]

Contact SAGES

Society of American Gastrointestinal and Endoscopic Surgeons
11300 W. Olympic Blvd Suite 600
Los Angeles, CA 90064 USA
webmaster@sages.org
Tel: (310) 437-0544

Find Us Around the Web!

  • Facebook
  • Twitter
  • YouTube

Important Links

SAGES 2023 Meeting Information

Healthy Sooner: Patient Information

SAGES Guidelines, Statements, & Standards of Practice

SAGES Manuals

 

  • taTME Study Info
  • Foundation
  • SAGES.TV
  • MyCME
  • Educational Activities

Copyright © 2023 Society of American Gastrointestinal and Endoscopic Surgeons