1. From the Quantitative Imaging Center, Department of Radiology, Boston University School of Medicine, 820 Harrison Ave, FGH Building, 3rd Floor, Boston, MA 02118 (A.G., F.W.R., M.D.C.); Department of Radiology, University of Erlangen-Nuremberg, Erlangen, Germany (F.W.R.); Musculoskeletal Centre X-Ray Department, Leeds Teaching Hospitals Trust, Chapel Allerton Hospital, Leeds, England (P.R.); Leeds Musculoskeletal Biomedical Research Unit, University of Leeds, Leeds, England (P.R.); Aspetar Orthopaedic and...