My son had a traumatic birth, which resulted in him developing sagittal synostosis. His head was narrow at the sides, and he had frontal bossing..where the fore head was pushed out. He had a MRI at 2 days of life, and was lightly sedated for it.
Since then, due to his heart/transplant there of, he has had a bevy if CT's. There is a good dose of radiation that is delivered, but it will be less for your baby, because of size
and body thickness. You can ask for a dose assessment if you are really concerned, but the type of radiation is the kind that passes through, so it's damage is minimal. The need far outweighs the risk. If she has a type of synostosis, she may need surgical repair, and that has to happen sooner rather than later.This is because it needs to happen before the skull thickens and hardens.My son had it done at 4 months, and the healing was extremely rapid. But he looks worlds better! I hope that all goes well!