This is why we get scan artifacts from giant specimens. It fits, but only just. The x-ray beams are getting scattered from being too close to the x-ray detectors (ring around the specimen), creating noise in the images. The red lines on the specimen are from a laser, used to align it properly within the gantry of the scanner. The femoral head (hip joint) is visible as the pale white thingy, down on the bottom right.
What's In John's Freezer? 
[…] of that research, on specimens John previously CT-scanned. He has a bunch of posts up: 1, 2, 3, 4. What we are doing is a detailed dissection of giraffe legs. Not something I’d trust myself […]