Good Afternoon Butterfly,
A MRI is a much more accurate method of measuring the volume of your implant.I would use this rather than an ultrasound.
The rippling is a result of the implant, the capsule and your overlying soft tissue.
Some implants are more prone to rippling. We know that saline implants are the worst, and that softer, less cohesive implants are more prone to rippling than firmer, more cohesive implants. The firmer the implant, or the more "cohesive" the silicone gel, the less likely the chance of rippling. You can check the cohesiveness of your implant on the company's website.
Secondly, mild capsular contracture often first presents as rippling. You mention you also have some mild aching pain and hence if your implant is firmer on one side than the other, it would be worthwhile checking with your surgeon to ensure that the capsule on the affected side is normal.
Finally, any mild rippling will be visible in very thin patients or in whom there is inadequate soft tissue cover. One option to camoflague this rippling, particularly in the cleavage area, is to swap the implant from above the muscle to a retromuscular pocket. In this way the muscle is used to augment and supplement the skin and soft tissue and may allow you to fix the rippling without changing the implant size.
The other option we sometimes use is fat grafting.
The implant shape and its profile will have very little, if any implact, on rippling. I have seen severe rippling in both round and anatomical implants.
The most reliable method to correct your rippling is to swap the implant to a high cohesive gel implant, at the same time perform a capsulectomy, and swap the implant from it's subglandular position to a behind the muscle pocket.
I hope this helpsCheers MarkProfessor Mark Ashton MD, MBBS, FRACS