These things are killing me...

I scan about 1-2 rolls of 120 film per week, and I have often struggled with this issue. The negatives will have a slight warp, and it shows up in the scan. I'm sure you guys have a term for this, so I've taken a screen shot just to be clear. Does anyone have a fix for this? Sometimes my negatives won't lay flat, and I can't seem to get around that. These warps are pretty tough to work out, or avoid. Any thoughts?

If you're referring to the Newton rings then there are ways around. What scanner setup are you using?

A glass carrier will hold negs perfectly flat, but I see Newton's Rings, so maybe you are already using glass? Try ANR glass and make sure the frosted side is against the base side of the film (not the emulsion side). If you are using a flatbed scanner, you may need to adjust the height of the film carrier to insure good focus.