Hi,<br><br>I've been assigned the task of modifying a SPECT image visualization program written with VTK/KWWidgets, and as part of my project, I need to be able to add image overlays. For example, I will need to draw dotted lines around thresholded regions of interest, crosses denoting maxima, and other things of that nature. Obviously I cannot simply be changing the actual pixel values, or I would be damaging the underlying data.
<br><br>What is the recommended approach? Any hints or suggestions at all would be greatly appreciated.<br><br>Thanks,<br>Sonca Teng<br>MIRG<br>