SI Joint, Sacrum, Coccyx - PDF Document

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  1. UT Southwestern Department of Radiology Anatomy: SI Joint, Sacrum, Coccyx Sub-Anatomy: Pelvis 1.5T or 3T ORDERABLE- Pelvis - Exams - Routine coil; for large patient Torso coil Coil: Spine SEQUENCE - BASICS % R F O V PLANE SEQ Slice M T X Voxel size (mm) F A/ TI Nex Avg Acq ETL Turbo Factor Pixel Shift BW-kHz Misc / Comment Gap (mm) Phase Encode Scan TIME (min) thicknes s (mm) TR TE NS ROUTINE ROUTINE Only GRE 3 plane scout AX T2 SPAIR Ax T1 Cor Obl T1 Cor Obl STIR Sagittal T2 Dixon ↓ OPTIONAL ↓ 1 2 3 4 5 4x0.6x0.7 4x0.6x0.7 4x0.6x0.7 4x0.6x0.7 4x0.6x0.7 0.4 0.4 0.4 0.4 0.4 4000 600 600 2000 4000 50-65 6-9 6-9 25-35 50-65 Failed fat sat Ax STIR 4x0.6x0.7 0.4 2000 25-35 Instructions: FOV and Coverage- On axials, cover from L4-5 to just below lesser trochanters and from skin to skin. On coronal oblique (shovel shot), cover the sacrum and coccyx from iliac bone to iliac bone just beyond SI joints. On sagittals, again cover the sacrum and coccyx from iliac bone to iliac bone just beyond SI joints, top to bottom coverage is from L4-5 to lesser trochs covering the entire coccyx.. Others- Always put marker at the site of most pain, injury or swelling. If motion observed, stop the scan, instruct patient to lay still and repeat the sequence.