Fat transfer to back of head? (Photo)

Dear all, I posted a similar question many months ago and saw others asking for fat transfer to the head aswell. I would like to get a professional opinion on what can be expected from adding volume to the scalp using fat reagrding permanent/longterm results? Since it depends on each individual case and the amount of fat, I attached a picture for better understanding of my case. Would it be possible with one or two fat grafting sessions so achieve the shown result permanently? Many thanks!