Co-registration of Sequential Multidetector Computed Tomography Studies for the Evaluation of Surgical Instrumentation following Resection of Spinal Tumors
Figure 2
Case 2: 39-year-old man with renal cell carcinoma metastatic to the T2 through T4 vertebral bodies, s/p vertebrectomy with placement of Steinmann pin and methyl methacrylate graft. (a, b). Sequential sagittal noncontrast MDCT studies 3 months apart demonstrate subtle posterior migration of the Steinmann pin and methyl methacrylate graft. Arrow in (b) points to initial position of the graft. (c, d). Sagittal co-registered MDCT studies (windowed to view methyl methacrylate). Posterior migration of the methyl methacrylate graft; initial position (black arrow) and position on followup, (white arrow). (e) Sagittal coregistered MDCT studies (windowed to view instrumentation). Posterior migration of the Steinmann pin; initial position (black arrow) and position on followup (white arrow). (f). MIP (maximal intensity projection). Posterior migration of the Steinmann pin; original position: black color, followup: red color.
