How can I fill a hollow area present in a femur head?

Hello my name is Jesus, I am doing a project in which I must do a 3D modeling, using DCOM images. But I have a small problem, some areas present in the head of the femur are not completely filled, and I do not know what I could do to fill that area. Attached image of how I have the model for now

This is very typical for femur CT images and the SurfaceWrapSoldify extension is developed for solving this.