Methodology of locating myocardial dysfunction by strain and strain rate using 4D discretely acquired trans-esophageal echocardiogram

The article reported a methodology and a system development to locate the area of myocardial dysfunction using Trans-esophageal Echocardiogram (TEE). The gated and discretely acquired left ventricular TEE images were first delineated and were reconstructed into 3D wire mesh. In tracing the normal vector of contour and centroid of LV chamber, the distribution of centroid appeared in a function of natural logarithm decay which was significantly distributed within 1 mm radius. The minimum size for evaluation myocardial dysfunction was calculated and reported. The distribution of angle for normal vectors was tallied. The distribution was peaked at ±6°in range. The effected size of dysfunction area can be carefully observed is 0.25 cm 2 for 5 cm diameter size of heart. This means that the dysfunction of local area, such as LAD area of myocardial can be examined using reconstructed 4D LV model using TEE images.