MRI Sacroiliitis/SI Joints/Sacrum WO or W/WO MSK Protocol

Scan Notes:

Angle OBLIQUE to sacrum

If hardware is present:

  • Do Axial and Coronal STIR instead of fat-sat mid-TE
  • If with Contrast, do non-fat-sat T1 post-contrast

Last updated: 4/8/19
Charge as: Pelvis WO or W/WO
Scanner preference: 1.5T or 3T
Coil: Torso Coil

Plane Weighting Mode Slice Gap FAT SAT FOV Notes
AXIAL OBL T1 (TE=min) TSE 4-5 mm 1 mm None Cover bilateral SI Joints, sacrum and coccyx. Angle perpendicular to Oblique Coronals (perpendicular to the sacrum).
AXIAL OBL T2 SPAIR TSE 4-5 mm 1 mm SPAIR Cover bilateral SI Joints, sacrum and coccyx. Angle perpendicular to Oblique Coronals (perpendicular to the sacrum).
SAG T2 SPAIR TSE 3-4 mm 0.5 mm SPAIR Cover entire sacrum and SI joints from L4-5 to tip of the coccyx. No need for entire pelvis. Include lateral femoral head margins
COR OBL T1 (TE=min) TSE 3-4 mm 0.5 mm None Cover L4-5 to tip of the coccyx through SI Joints and Sacrum. No need for entire pelvis. Include lateral femoral head margins. Angle parallel to long axis of sacrum (perpendicular to Axial Obl).
COR OBL STIR (TE=70msec) TSE 3-4 mm 0.5 mm STIR Cover L4-5 to tip of the coccyx through SI Joints and Sacrum. No need for entire pelvis. Include lateral femoral head margins. Angle parallel to long axis of sacrum (perpendicular to Axial Obl).
SAG PRE (if giving contrast for infection/osteo) T1 TSE 3-4 mm 0.5 mm NONE Same as SAG T2 FS Same as SAG T2 FS

If Ordered with Contrast

Plane Weighting Mode Slice Gap FAT SAT FOV Notes
COR OBL T1 THRIVE TSE 3-4 mm 0.5 mm THRIVE Same as pre Same as pre
AXIAL OBL T1 SPIR TSE 4-5 mm 0.5 mm SPIR Same as pre Same as pre
MRI Pelvis Piriformis WO MSK Protocol image
MRI Sacroiliitis/SI Joints/Sacrum WO or WWO MSK Protocol image