This software is about the calculation of Tau, left ventricular diastolic time constant. It is developed based on Dr. Bai's formulas (www.xufangbai.com). Keep in mind the imports have to be accurate enough to make a decent calculation. Garbage in, garbage out. The software is written in Java, If Java is not installed in your computer, it can be downloaded via http://www.java.com/en/download/inc/windows_new_xpi.jsp. Thanks for your interests.