Feature | MRI/MRA | PET/CT |
---|---|---|
Detection of vascular inflammation | ++ | +++ |
Detection of vascular structural changes | +++ | ++ |
Spatial resolution | < 1 mm | > 4 mm |
Visualization of temporal arteries | Yes | No |
Location of large arteries visualized | Head, neck, thoracic regions | Whole body |
Outcome treatment measure | No proven role | Possible role |
Radiation exposure | No | Yes |
Presence of renal failure | Contraindicated | No issue |
Cost of procedure | + | +++ |
PET/CT: positron emission tomography/computed tomography; MRI: magnetic resonance imaging; MRA: magnetic resonance angiography; GCA: giant cell arteritis.