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Can anyone suggest an algorithm to interpolate/extrapolate ROI based on a set of contours?<br><br>I'm
trying to understand how a volume is computed in a radiotherapy
treatment planning system. The vendor's documentation states that
shape-based interpolation is used to construct 3D volume from a stack of
2D contours. Specifically, a distance map based interpolation is used.<br><br>What
I don't quite understand is the way they cap off the two ends of the
contour stack to obtain a rounded ends of the volume. With this rounded
ends, the volume of a box of demension 4cm x 4cm x 3cm (3 slices of 4cm
x 4cm contour) was computed to be 40 cm^3.<br><br>I'm not aware of any
robust algorithm can be used to create a rounded ends to a stack of say
square contours of the same size and location. I'd appreciate if anyone
can provide suggestions?<br><br>Thanks!<br>Xiaofeng Zhao<br>
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