- L-1 through L-4 vertebrae must be without artifacts, multiple vertebral fractures; therefore at least 3 vertebrae should be without fractures, osteophytes, or other abnormalities that would interfere with the analysis of the posterior-anterior lumbar spine BMD measurement. The reading of the BMD, T-score should be in the range of - 2.0 and - 4.0 at least for one of the 2 sites measured (spine or hip).