different smoothing algorithms and also different spans for the weighted moving average technique on data extracted from the three-chambered apical LA section. As it can be seen the WMA method with higher weighting span ($20$) results in a length decrease of about $15\%$ in LA section while WMA10 and the b-spline methods result in ringing and instabilities near the SA basal region, which is clearly visible close to the end of systole (Fig. \[smoothing\]-b). However, using variable span moving average with a higher span value near the basal section, unlike the b-spline method, can take care of the instabilities in this region, while using smaller span near the apex provides less smoothing in apex area (which results in better preservation of the shape of LV). Table \[table\_comparison\] quantitatively compares the effect of smoothing algorithm on the surface reconstruction process in terms of preserving the important features of the shape of LV (length of the long axis) and least square error for curve fitting. Our results show the VWMA method provides the best trade-off between the shape preservation and preventing ringing in the final reconstructed geometry.

Comparison of LV parameters with their corresponding physiological range
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Several parameters related to functionality 