Radiofrecuencia TriPolar (multipolar) after lipo, is it any good?

I had lipo on my abdomen and flanks 6 weeks ago but there is still fat in my stomach area. Would radio frequency actually help with this? More specifically, would Radiofrecuencia tripolar (multipolar) work well? This is the machine my doctor started using. Lastly, should I be waiting a certain amount of time before starting these treatments or is it okay at 6 weeks post op?