How Can I Definitively Determine That I Have a Slow Leak in my Saline Implant?

Saline breast implants could on occasion have a very slow leak, although once saline implants start to leak they eventually completely deflate.  MRI would not be necessary to assess saline implants, but once you have them, it could be helpful in assessing if there is significant volume discrepancy.  Your surgeon should be able to tell if you have a partially deflated saline implant, as it has a different feel.  Ultimately, the most important factor is whether asymmetry bothers you enough to undergo another surgery.

It's a great question. If saline implants leak, they simply deflate, your body absorbs the saline fluid, and there are no issues. You should see a noticeable difference in your breasts over just a few days.

Thank you for the question. 

Leakage of saline breast implants usually becomes obvious over time;  the breast tends to become smaller and breast implants softer and/or demonstrates more rippling. Your plastic surgeon will be able to make the diagnosis upon examination. No radiographic studies are necessary.

If the implant appears to be filled,  another explanation may be that it has shifted causing the breast to appear smaller visually.

I hope this helps.