Large right-sided bi-convex (or lenticular) collection under the skull. It is hyperdense in comparison to surrounding brain tissue/parenchyma.
On this slice, there is midline shift with compression of the lateral ventricles.
There is also marked soft tissue swelling over the skull on the right side.
Using the bony window, there is a depressed, comminuted skull fracture overlying the area we know the collection is in.