Which imaging modality may show narrowing of joint space and osteophytes?

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Joint space narrowing with osteophyte formation are classic signs of degenerative changes in the spine, best appreciated on plain X-ray imaging. When cartilage wears down, the space between the adjacent bone surfaces appears reduced on radiographs, and the bone responds by forming osteophytes at the joint margins. In the lumbar region, standard X-rays readily display these bony changes, making them the most straightforward modality to detect such features.

MRI excels at soft tissues and cartilage detail but isn’t as reliable for measuring cartilage loss in a way that clearly shows narrow joint spaces and osteophytes. CT provides excellent bone detail and can reveal osteophytes, but it’s not the typical first choice for documenting joint space narrowing in the spine. Ultrasound can’t effectively visualize deep lumbar joints and their osteophyte formation.