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TSI - Tissue Synchronization Imaging (TSI) in Clinical Practice
Performing Tissue Synchronization Studies - Overview
Tissue Synchronization Imaging (TSI) is a parametric imaging tool based on Tissue Velocity Imaging that provides clinicians with additional image enhancement for assessing delayed cardiac wall motion.
The TSI parametric image analyses the tissue velocity signals within the image to determine the peak velocities within a specified portion of the cardiac cycle. Since these peaks will occur in relation to overall motion, delayed wall motion will produce a delayed peak velocity.
The amount of delay within the defined area of the cardiac cycle is used to assign a map or color to that location in the image. With TSI, the color represents the amount of tissue motion delay rather than the absolute value ofthe tissue velocity. When this technique is applied in real time across the 2D image, the variation in color provides both a qualitative and quantitative representation of wall motion delay allowing a trained physician to readily identify and evaluate asynchronous wall motion.
GE continues to invest in providing clinical tools for the diagnosis and treatment of heart failure by taking TSI to the next level with multi-dimensional imaging. It allows the user to acquire three planes simultaneously from the same cardiac cycle. This prevents any differences seen between the heartcycle lengths between the planes. It gives the user the ability to generate a bulls-eye display along with a 4D model with quantitative measurements and surfacemapping so that you can better communicate cardiac dyssynchrony to Electrophysiologists and referring physicians.
Authors:
Ole Breithardt, M.D.
Susan Floer, BS, RDCS
Hans-Juergen Goldschmidt, PhD
Andreas Heimdal, PhD
Sue Phillip, RCS