Need some help and advice in lofting an ellipse to an imported body (from a CT scan)

Hi guys,

I am trying to create a simple loft between a user-defined ellipse and the face of an imported body. I am having issues with this and sometimes it works after a lot of fidgeting and mostly it doesn't. Is there any way I can definitely have a loft between these to bodies. Any help will be greatly appreciated.

Thank you,

Aditya

SolidworksParts And Features