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Published on: January 20, 2023
Positron emission tomography in spinal infections
Alexandros Georgakopoulos1, Spiros G Pneumaticos2, Nikolaos V Sipsas3
1Nuclear Medicine Division, PET/CT section, Foundation for Biomedical Research of the Academy of Athens, Athens, Greece.
Abstract:
Magnetic resonance imaging is the imaging method of choice for diagnosing infection of the spine in unoperated cases. 2-[(18)F]-fluoro-2deoxy-d-glucose positron emission tomography/computed tomography study is recommended to distinguish between spinal infection and common Modic change in patients with metallic implants and prosthetic replacements and for differentiating tuberculous from pyogenic spondylitis in ambiguous cases, reflecting the activity of the infection. Also, it seems to have a strong clinical impact in more than half of patients with infectious spondylitis, while it is superior to other imaging techniques in revealing residual disease after treatment and early response to therapy. New tracers as well as new hybrid modalities are under investigation.
Insights
Magnetic resonance imaging is best for diagnosing spinal infections in unoperated patients. Positron emission tomography/computed tomography aids in differentiating spinal infections from Modic changes and identifying infection activity, especially in patients with implants.
Area of Science:
- Radiology
- Nuclear Medicine
- Orthopedics
Background:
- Spinal infections pose diagnostic challenges, particularly in patients with metallic implants or prosthetic replacements.
- Distinguishing between spinal infection and other conditions like Modic changes can be difficult with conventional imaging.
- Accurate assessment of infection activity and treatment response is crucial for effective patient management.
Purpose of the Study:
- To evaluate the role of magnetic resonance imaging (MRI) in diagnosing spinal infections.
- To assess the utility of 2-[(18)F]-fluoro-2deoxy-d-glucose positron emission tomography/computed tomography (FDG-PET/CT) in specific diagnostic scenarios.
- To highlight the clinical impact and superiority of advanced imaging techniques in managing infectious spondylitis.
Main Methods:
- Review of magnetic resonance imaging (MRI) for diagnosing spinal infection in unoperated cases.
- Evaluation of 2-[(18)F]-fluoro-2deoxy-d-glucose positron emission tomography/computed tomography (FDG-PET/CT) for differentiating spinal infection from Modic changes in patients with implants.
- Assessment of FDG-PET/CT for differentiating tuberculous from pyogenic spondylitis and for monitoring treatment response.
Main Results:
- MRI is the preferred imaging modality for diagnosing spinal infections in non-operative cases.
- FDG-PET/CT is recommended for distinguishing spinal infection from Modic changes in patients with metallic implants and for differentiating tuberculous from pyogenic spondylitis.
- FDG-PET/CT demonstrates significant clinical impact, superior ability to reveal residual disease, and early response to therapy compared to other techniques.
Conclusions:
- Advanced imaging techniques, particularly FDG-PET/CT, offer significant advantages in diagnosing and managing spinal infections.
- FDG-PET/CT plays a vital role in complex cases involving implants and differentiating infectious etiologies.
- Ongoing research into new tracers and hybrid modalities promises further advancements in imaging spinal infections.
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