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MRI - technique
MRI-SIJ sequences/planes
MRI - sacroiliitis
Grading sacroiliitis
MRI-Spine sequences/planes
MRI - spinal changes
Grading spinal changes
MR sequences and scan planes spine

For spinal examination sagittal T1 and STIR sequences are often sufficient, but evaluation of the joints between the vertebral bodies and the ribs (costo-vertebral joints) may require supplementary axial STIR/T2FS slices and in case of disk protrusion/extrusion axial T2-weighted slices may be necessary.


Sagittal T1 and STIR images of the whole spine in a patient with AS showing signs of disease activity in the form of edema at vertebral corners and pronounced edema in the 4. And 5 thoracic vertebra in addition to fat depositions corresponding to areas with previous active inflammation.


Sagittal STIR sequence at the lateral side of the lower thoracic spine showing edema postero-lateral in a vertebra body (arrow). Supplementary axial STIR images (beneath) illustrate the anatomical location of edema to the joints between the ribs and the vertebral bodies (costo-vertebral joints) (arrows). This is a typical localization of inflammation in ankylosing spondylitis.


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