I came across this facebook page, there's a great image at the top of an IJV stenosis, the venogram, and the after-picture. It's a really large jugular vein afterwards.
Further down she also has three clips of ultrasounds, labelled b-mode abnormality, the bottom one seems to be showing reflux but I am not sure what the other two are showing.
Thanks go to Lanie for sharing these online! If the link doesn't go to the wall page, just click on 'wall'.