Effects of Region of Interest (ROI) Tracking on the Diagnosis of Left Ventricular Dyssynchrony from Doppler Tissue Images

摘要

BackgroundLeft ventricular dyssynchrony is often diagnosed by comparing velocity curves from Doppler tissue images (DTI) of 2 or more myocardial regions. Velocity curves are generated by placing sample volumes or “regions of interest” (ROIs) within the myocardium. ROIs need to be manually relocated to maintain a mid-myocardial location as the heart moves, but are frequently left in a stationary position. The error caused by use of a stationary ROI may affect the diagnosis of dyssynchrony, but this has not been quantified.