You will find photographs of cadaver knees and MRI’s.

http://www.vh.org/Providers/Textbooks/JointFluoro/JointFluoroHP.html

There are some nice partly colorized X-rays of joints at this site from the University of Iowa.

http://www.vh.org/Providers/Textbooks/pelvis/osseous.html

Here are several views of the pelvis.