I need a little help looking at these ct scans of a human body, one of the skull, one of the femur, and one of the thoracic area of the body. Which areas on the scans are cortical bone, and where is any cancellous bone? I am analyzing them in "image J" Please, only if you really know! thanks

http://img143.imageshack.us/img143/7676/thoracic25uo0.png

http://img177.imageshack.us/img177/1641/skull33iy4.png


http://img177.imageshack.us/img177/6739/femur48cd3.png