Anatomical variation of the sacroiliac joints: an MRI study with synthetic CT images

Abstract

Key points 1. Sacroiliac joints (SIJ) variants are very commonly observed in patients suspected of sacroiliitis. 2. Synthetic CT allows detection of small or subtle findings including SIJ variants. 3. Women have a higher prevalence of SIJ variants. 4. Multiple variants can coexist within one SIJ. 5. High prevalence of variants indicates existence of subtypes of the ‘normal’ SIJ.

Keywords

• Sacroiliac joint
• Anatomic variation
• Magnetic resonance imaging
• Artificial intelligence
• Synthetic computed tomography