Abstract

Optical mapping is a well established technique for recording monophasic action potential traces either within myocardial slices or on the epicardial surface of isolated hearts. This measuring technique offers a high spatial and sufficient temporal resolution but it is sensitive towards myocardial motion. Motion artifacts occur because the mapping between a certain tissue portion sending out fluorescent light and a pixel of the photodetector changes over time. So far this problem has been adressed in two different ways: Suppressing the motion or ratiometric imaging. Working with beating rat heart slices we developed a different approach to noninvasively record simultaneously optical mapping data and motion of the slices. Our approach is based on image registration. We use the background fluorescent light to perform first a rigid transformation to detect translational and and rotational motion. The contractive motion is recovered using a non-rigid demons registration algorithm afterwards. The investigation is based on recordings of four different slices stained with Di-4-ANEPPS.

Original languageEnglish
Title of host publication Optics in Health Care and Biomedical Optics V
Number of pages6
Volume8553
PublisherSPIE
Publication date01.12.2012
Article number855305
ISBN (Print)978-081949308-8
DOIs
Publication statusPublished - 01.12.2012
EventOptics in Health Care and Biomedical Optics V - Beijing, China
Duration: 05.11.201207.11.2012

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