[Metal artifact reduction in post-operative spinal imaging using image acquisition protocol in multidetector computed
Anales Del Sistema Sanitario De Navarra
|January 21, 2016
Summary
A new computed tomography (CT) protocol significantly reduces metal artifacts from titanium pedicle screws after lumbar fusion surgery. This improved imaging allows for more accurate assessment of screw placement in postoperative patients.
Area of Science:
- Radiology
- Neurosurgery
- Orthopedic Surgery
Background:
- Metal artifacts in CT scans hinder diagnosis in patients with metallic implants.
- Titanium pedicle screws used in lumbar fusion can cause significant artifacts.
- Accurate assessment of screw placement is crucial for postoperative patient care.
Purpose of the Study:
- To evaluate a specific metal artifact reduction image protocol.
- To reduce artifacts caused by titanium pedicle screws in lumbar fusion patients.
- To improve diagnostic accuracy of pedicle screw placement post-surgery.
Main Methods:
- Compared standard CT acquisition protocol with a 64-slice multidetector-row CT (MDCT) protocol.
- Analyzed CT scans from 23 patients (103 screws) with standard protocol.
- Prospective evaluation of 18 patients (104 screws) using the specific MDCT protocol.
Main Results:
- Standard CT showed mean overdimension of 1.045 mm due to artifact.
- The 64-slice MDCT protocol resulted in minimal overdimension (0.005 mm proximal, 0.025 mm distal).
- The new protocol drastically reduced artifact-induced overdimension.
Conclusions:
- The specialized 64-slice MDCT protocol effectively minimizes metal artifacts from titanium pedicle screws.
- This protocol enhances the diagnostic value of CT for assessing screw positioning after lumbar fusion.
- It offers a preferred imaging modality for postoperative screw evaluation.
