baby has a flat dent spot

My baby is 9 months old. Since about 3 months old, I noticed a flat “dent” spot on the top of her heads towards the back but right in the middle. Where you would put a high ponytail, best way to describe )its More of a flat spot than a dent. where the head is supposed to start curving down, for that round shape, it’s a flat spot and then a curve on the bottom of back.

I took her to the doctor immediately and the doctor was not concerned about it.

Now, 6 months later, the thought popped up in my head again and now i’m stressing out all over.

Do babies have perfect round shapes or are dents and flat spots normal?

No. She has never had any falls to cause this.

No. It isn’t from sleeping because her head doesn’t even touch the bed in this location.

PleaS share any stories if you have them. Stressed out mom here ....

Yes. Reaching all milestones.

The picture shows what i’m talking about.

side view and then the top view

I’m afraid it’s hurting her or her development and i don’t want to put her through unnecessary CT scans and xrays if this is normal.

People say it’s a fontalle but the only fontalle it could possibly be would be the posterior because the one of top is almost closed

and this does not look like a fontalle.