Ultrasound Strain Imaging of Altered Myocardial Stiffness

Ultrasound strain imaging of altered myocardial stiffness: stunned versus infarcted reperfused myocardium.

BACKGROUND In this study we evaluate the diastolic deformation of ischemic/reperfused myocardium and relate this deformation to tissue elastic properties. METHODS AND RESULTS Farm pigs were subjected to left anterior descending coronary artery occlusion followed by reperfusion to create either stunning (n=12) or transmural myocardial infarction (n=12). Ultrasound-derived radial strain rates (...

myocardial strain and strain rate imaging: comparison between doppler derived strain imaging and speckle tracking echocardiography

Geometric reconstruction using tracked ultrasound strain imaging

The accurate identification of tumor margins during neurosurgery is a primary concern for the surgeon in order to maximize resection of malignant tissue while preserving normal function. The use of preoperative imaging for guidance is standard of care, but tumor margins are not always clear even when contrast agents are used, and so margins are often determined intraoperatively by visual and ta...

Tissue characterisation by ultrasound strain imaging

Real-Time Elastography (RTE) is a new imaging modality that monitors tissue strain during applied stress. The aim of this thesis was to validate if RTE was a reliable modality to reflect pathologically induced differences in elasticity or tissue hardness and to interrogate if assessment of elastic changes by RTE could be used as a diagnostic tool in clinical practice. Particularly, we focused o...

Regional asynchrony during acute myocardial ischemia quantified by ultrasound strain rate imaging.

OBJECTIVES We propose a new method to easily quantify asynchronous wall motion due to postsystolic shortening (PSS). We also studied the relationship of the spatial and temporal extent of PSS to the extent of myocardium at ischemic risk after variable duration of ischemia. BACKGROUND Postsystolic shortening is a sensitive marker of asynchrony during ischemia. Current techniques for detection ...