 - Spinal anatomy suitable for dual-energy x-ray absorptiometry DXA. At the lumbar spine, there is no evidence of vertebral fracture in at least 3 vertebrae in the L1 to L4 region on baseline spine films. Significant scoliosis, bony trauma, degenerative joint disease, and sequelae of orthopedic procedures that result in anatomy that is unsuitable for accurate bone densitometry must be absent from the lumbar spine. 