<html><body><div style="color:#000; background-color:#fff; font-family:times new roman, new york, times, serif;font-size:12pt"><div style="font-family: 'times new roman', 'new york', times, serif; font-size: 12pt; ">Dear ITK Users,</div><div style="font-family: 'times new roman', 'new york', times, serif; font-size: 12pt; "><br></div><div style="font-family: 'times new roman', 'new york', times, serif; font-size: 12pt; ">I am new to DIR world and I need to work out the best DVFs for my 'deformed' phantom images. </div><div style="font-family: 'times new roman', 'new york', times, serif; font-size: 12pt; ">I tried Demons and B-Spline as in DeformableRegistration2 and DeformableRegistration7, but neither of them seem to be very good. The results can be downloaded from my dropbox:</div><div style="font-family: 'times new roman', 'new york', times, serif; font-size: 12pt; ">Demons: </div><div style="font-family: 'times new roman',
'new york', times, serif; font-size: 12pt; ">http://dl.dropbox.com/u/1906263/golf_demons.gif</div><div style="font-family: 'times new roman', 'new york', times, serif; font-size: 12pt; ">B-Spline: </div><div style="font-family: 'times new roman', 'new york', times, serif; font-size: 12pt; ">http://dl.dropbox.com/u/1906263/golf_bspline.gif</div><div style="font-family: 'times new roman', 'new york', times, serif; font-size: 12pt; "><br></div><div><font class="Apple-style-span" size="3">The B-Spline ones look more reasonable but still with quite obvious errors at the region where there is no deformation. I guess there might be something to do before deformable registration could be helpful or there might be better algorithms for this case? Your suggestions will be appreciated <span class="Apple-tab-span" style="white-space:pre"> </span>VERY MUCH! </font></div><div><br></div><div>Another question regarding visualizing vector fields in Paraview:
it seems that <span class="Apple-style-span" style="font-size: 16px; ">Paraview display PNG (images) and VTK (vector field, after '</span><span class="Apple-style-span" style="font-family: Tahoma; ">scalars_X*iHat+scalars_Y*jHat' and glyph</span><span class="Apple-style-span" style="font-size: 16px; ">) in different Y orientations. </span><span class="Apple-style-span" style="font-size: 16px; ">I haven't figured out how to correctly overlay them, but just tried to flip and shift the vector field in Paraview, </span><span class="Apple-style-span" style="font-size: 16px; ">so the vector field in the above results might not be </span><span class="Apple-style-span" style="font-size: 16px; ">quite aligned with the images. Will also appreciate if you can help to let me know the best&correct way to visualize the vector fields!</span></div><div><span class="Apple-style-span" style="font-size: 16px; "><br></span></div><div><span
class="Apple-style-span" style="font-size: 16px; ">Thanks a lot for any inputs!</span></div><div><br></div><div>Ryan</div><div style="font-family: 'times new roman', 'new york', times, serif; font-size: 12pt; "><br></div><div style="font-family: 'times new roman', 'new york', times, serif; font-size: 12pt; "><br></div></div></body></html>