Prediction of transitional lumbosacral anatomy on magnetic resonance imaging of the lumbar spine

Figure 3 T2-weighted images of the lumbar spine. A: The mid-sagittal T2-weighted image of the lumbar spine exhibits increased A-angle (49.38°) and B-angle (53.04°); B: Correspinding axial fast spin-echo image in this 42-year-old female subject with transitional lumbosacral anatomy demonstrates bilateral pseudoarthrosis of the transitional vertebra with the sacral ala (arrowheads).