Endograft
There is an endograft and clips overlying the lumbar spine DXA image. Since the endograft overlies bone, the lumbar spine DXA will not be useful for diagnosis or follow-up.

This is the accompanying radiograph which shows the endograft and clips.

This DXA scan shows and endograft and clips overlying the lumbar spine with the accompanying radiograph. Since the endograft and clips overly bone, the lumbar spine DXA will not be useful for diagnosis or follow-up.
Sarah L Morgan, MD, RD, CCD, The University of Alabama at Birmingham
• Wang, X. and B. Schooley, Pitfalls of DXA interpretations in lumbar spines. . J Clin Densitom, 2007. 10(2): p. S203.