<html><body><div style="color:#000; background-color:#fff; font-family:times new roman, new york, times, serif;font-size:12pt"><div>Hello everyone,</div><div><br></div><div>I have visualized a volume from CT scans (dcm files). What I want to do is to pick a subvolume with the mouse and display it. Can I use the <vtkExtractVOI> filter for this job? Moreover, how I can send information to this filter concerning the subvolume that I define with the mouse?</div><div><br></div><div>Thanks in advance, christos</div></div></body></html>