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Real-time intraoperative visualization of myocardial circulation using augmented reality terperature display
Linköping University, Department of Medical and Health Sciences, Cardiothoracic Anaesthesia and Intensive care. Linköping University, Faculty of Health Sciences. Östergötlands Läns Landsting, Heart and Medicine Center, Department of Thoracic and Vascular Surgery.
Linköping University, Department of Medical and Health Sciences, Cardiothoracic Anaesthesia and Intensive care. Linköping University, Faculty of Health Sciences. Östergötlands Läns Landsting, Heart and Medicine Center, Department of Thoracic and Vascular Surgery.
Linköping University, Department of Management and Engineering, Applied Thermodynamics and Fluid Mechanics. Linköping University, The Institute of Technology. Thermirage AB, Linköping, Sweden.
Thermirage AB, Linköping.
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2013 (English)In: The International Journal of Cardiovascular Imaging, ISSN 1569-5794, E-ISSN 1875-8312, Vol. 29, no 2, 521-528 p.Article in journal (Refereed) Published
Abstract [en]

For direct visualization of myocardial ischemia during cardiac surgery, we tested the feasibility of presenting infrared (IR) tissue temperature maps in situ during surgery. A new augmented reality (AR) system, consisting of an IR camera and an integrated projector having identical optical axes, was used, with a high resolution IR camera as control. The hearts of five pigs were exposed and an elastic band placed around the middle of the left anterior descending coronary artery to induce ischemia. A proximally placed ultrasound Doppler probe confirmed reduction of flow. Two periods of complete ischemia and reperfusion were studied in each heart. There was a significant decrease in IR-measured temperature distal to the occlusion, with subsequent return to baseline temperatures after reperfusion (baseline 36.9 ± 0.60 (mean ± SD) versus ischemia 34.1 ± 1.66 versus reperfusion 37.4 ± 0.48; p < 0.001), with no differences occurring in the non-occluded area. The AR presentation was clear and dynamic without delay, visualizing the temperature changes produced by manipulation of the coronary blood flow, and showed concentrically arranged penumbra zones during ischemia. Surface myocardial temperature changes could be assessed quantitatively and visualized in situ during ischemia and subsequent reperfusion. This method shows potential as a rapid and simple way of following myocardial perfusion during cardiac surgery. The dynamics in the penumbra zone could potentially be used for visualizing the effect of therapy on intraoperative ischemia during cardiac surgery.

Place, publisher, year, edition, pages
Springer, 2013. Vol. 29, no 2, 521-528 p.
Keyword [en]
Augmented reality – Mixed reality – Myocardium – Ischemia – Infrared thermometry – Visualization
National Category
Medical and Health Sciences
Identifiers
URN: urn:nbn:se:liu:diva-80802DOI: 10.1007/s10554-012-0094-5ISI: 000314285500030OAI: oai:DiVA.org:liu-80802DiVA: diva2:548311
Available from: 2012-08-30 Created: 2012-08-30 Last updated: 2017-12-07

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Szabó, ZoltánBerg, SörenSjökvist, StefanWren, JoakimAhn, HenrikSmedby, Örjan

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Szabó, ZoltánBerg, SörenSjökvist, StefanWren, JoakimAhn, HenrikSmedby, Örjan
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Cardiothoracic Anaesthesia and Intensive careFaculty of Health SciencesDepartment of Thoracic and Vascular SurgeryApplied Thermodynamics and Fluid MechanicsThe Institute of TechnologyThoracic SurgeryCenter for Medical Image Science and Visualization (CMIV)RadiologyDepartment of Radiology in Linköping
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