After the cavitation operation, some fat cells are destroyed, some are partly destroyed but some are basically still intact. So they are of different sizes. If you use the body RF slimming head now, they will all become smaller in size and the body skin will be tightened just like you add a firmed cover on the fat. And the tissue(both fat and skin) become neat and toned. That should have been kind of perfect and some instant result has been visible. But if you go ahead with using the vacuum shaping head, you will just pull up the tightened skin to loosened and the fat tissue would bump up a little again. In this case, the vacuum will do no good but pull back the result.
But if you use the vacuum suctioning head right after the cavitation fat cracking, the case will be apparently different. The vacuum suction will pull up the tissue. When the vacuum suction head moves back and forth, the tissue is being drawn too. This action will destroy the support structure around each fat tissue grid, which dramatically promotes the fat cells being metabolized much more easily. The back and forth movement also will help to redistribute the non-settled fat cells since the supporting structure is destroyed.
Like you have many potatoes of different sizes full in a basket. If you shake the basket, the smaller ones will go to the bottom and the bigger one will be left to the top. And more room will be reserved because the shaking helps to redistribute the potatoes to fill up the room that fits their sizes most. By now you will find out the basket is not completely full yet. The following RF toning is like you use a cover added on the potatoes so that they won't bump up. The potatoes now are loaded neatly.