Estimation of coronary blood flow by cardiac thermography in open chest conditions

Na'ama Gordon, Shmuel Rispler, Samuel Sideman, Rona Shofty, Rafael Beyar

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This work is based on the hypothesis that coronary blood flow could be estimated from the dynamics of thermographic images during cold saline injection into the aortic root. The heart was exposed in five dogs, and imaged by an Agema thermographic camera. Coronary flow was measured by a transit-time flowmeter. Images were acquired 30 s after aortic root injection of 20 ml of cold saline. Several flow levels were achieved in each dog by obtaining a reactive hyperemic response to transient coronary occlusions. A temperature washout curve was obtained by averaging over an edge detected arterial segment for each frame. Several indices were calculated for each curve and correlated with coronary flow. We also tried the approach of model fitting, and consequently a model based on heat transfer theory was implemented.

Original languageEnglish (US)
Title of host publicationComputers in Cardiology
PublisherIEEE
Pages9-12
Number of pages4
StatePublished - 1995
Externally publishedYes
EventProceedings of the 1995 Conference on Computers in Cardiology - Vienna, Austria
Duration: Sep 10 1995Sep 13 1995

Other

OtherProceedings of the 1995 Conference on Computers in Cardiology
CityVienna, Austria
Period9/10/959/13/95

ASJC Scopus subject areas

  • Software
  • Cardiology and Cardiovascular Medicine

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