Abstract
MRI sacroiliac joint is a sensitive imaging modality for evaluation of inflammation and the accompanying structural changes. Assessment of SpondyloArthritis international Society (ASAS) classification criteria incorporates active inflammation of the sacroiliac joint on MRI as one of the criteria of imaging arm of axial spondylarthritis. The current lecture would cover basic imaging anatomy of sacroiliac joints, typical imaging features of sacroiliac inflammation in axial spondyloarthritis and ‘red-flags’ suggesting alternative diagnosis. The supplementary role of structural changes on MRI in aiding diagnosis of axial spondyloarthritis will also be highlighted.
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