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[3-dimensional computed tomography and multiplanar CT-reformations in lumbar spondylodesis]
P Lang1, H K Genant, P Steiger
1Department of Radiology, University of California, San Francisco.
Rofo : Fortschritte Auf Dem Gebiete Der Rontgenstrahlen Und Der Nuklearmedizin
|May 1, 1988
Summary
Three-dimensional computed tomography (3-D-CT) aids in detecting spinal fusion pseudarthrosis after lumbar fusion surgery. While superior to 2-D imaging, 3-D-CT can occasionally produce artifactual results, requiring careful interpretation.
Area of Science:
- Radiology
- Orthopedic Surgery
- Medical Imaging
Background:
- Spinal instability is a concern after posterior lumbar fusion.
- Accurate assessment of fusion integrity is crucial for patient outcomes.
Purpose of the Study:
- To evaluate the utility of three-dimensional computed tomography (3-D-CT) in diagnosing pseudarthrosis following posterior lumbar fusion.
- To compare 3-D-CT with multiplanar CT reformations and conventional radiography.
Main Methods:
- 42 patients with suspected spinal instability post-lumbar fusion underwent 3-D-CT and multiplanar CT reformations.
- Axial CT, sagittal/coronal reformations, and 3-D surface reconstructions were analyzed.
- Findings were compared with conventional radiography.
Main Results:
- Sagittal and coronal CT reformations identified pseudarthrosis more often than axial CT or radiography.
- 3-D CT cuts confirmed pseudarthrosis seen on 2-D images in most cases.
- Artifactual stability/instability was noted in 5 patients on 3-D CT, contrasting 2-D findings.
- 3-D surface reconstructions visualized complex anatomy and superficial breaks, aiding surgical planning.
Conclusions:
- 3-D-CT is a valuable adjunctive imaging tool for assessing spinal fusion.
- It offers detailed anatomical visualization and can improve preoperative planning and intraoperative localization.
- Careful interpretation is needed due to potential artifacts.