Magnetic
Resonance Imaging of Musculoskeletal Infections
MR technique (advantages, disadvantages)
MR
findings
Classification
| Non-infection | Infection | Edema | Cellulitis | Myositis | Myositis | Arthritis | Arthritis* | Spondylitis | Spondylodiskitis* | Edema | Osteomyelitis |
MR Technique
MRI
Advantages
–
multiplanar aquisition
– without ionizing
radiation
– imaging signal is based on
events at the molecular level
–
anatomical, biochemical, physiological information
–
no adverse reaction to contrast
–
imaging method of choice in soft tissue vizualization (subcutaneous
tissue, synovium, cartilage, tendons, nerves)
–
very sensitive to subtle bone changes (edema, erosions)
MRI
Disadvantages
–
Accesibility
– Costs
–
Time consuming
– Contraindications
–
metallic implants
– claustrophobia
MR
Technique
• MRI Protocol
–
T1 TSE, STIR
– T2 TSE fat sat in orthogonal plane
(axial)
– T1 fat sat + i.v. contrast in 2 orthogonal
planes
– at least one adjacent joint included
–
fast sequences on large body surface for rapid evaluation of the
extension of the process
– whole body-MR protocol in
patients with sepsis for rapid evaluation of septic determinations |  |
November 4,
2009
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