Nonuniform freezing rates

Nonuniform Freezing Rates. No Convection. An important case, approximated by freezing-cup studies, is that of the freezing rate diminishing with time according to Equation 1. For this, Wagner (154) showed that the interface concentration is constant and is given by... 

In order to freeze an image of the beating heart, the imaging modahty should provide high temporal resolution. This is necessary to compensate for motion of the coronary arteries, which demonstrate a complex and nonuniform movement pattern within and across the different coronary arteries, as well as within the different parts of the cardiac cycle (Achenbach et al. 2000). At heart rates below 80 bpm, the diastohc phase represents that phase of the cardiac cycle with the least... 

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