Imaging of the postoperative spine

Area of Science:

• Radiology
• Neurosurgery
• Orthopedic Surgery

Background:

• Spinal surgical procedures have increased, leading to more postoperative imaging.
• Complications are categorized as early (weeks) or delayed, varying by surgery type.
• Distinguishing normal postoperative changes from complications is vital.

Purpose of the Study:

• To review normal postoperative spine imaging appearances.
• To outline early and delayed complications following spinal surgery.
• To guide the appropriate use of imaging modalities for assessment.

Main Methods:

• Literature search encompassing guidelines and expert opinions on postoperative spine imaging.
• Analysis of imaging findings for both instrumented and non-instrumented spine surgeries.
• Discussion of imaging modalities including plain radiography, MRI, and CT.

Main Results:

• Plain radiography is key for immediate assessment and follow-up of spinal instrumentation.
• MRI is the preferred modality for evaluating the postoperative spine, especially for fluid collections.
• CT excels in assessing bony fusion and instrumented spine complications.
• Gadolinium-enhanced MRI aids in differentiating scar tissue from recurrent disc issues.

Conclusions:

• Accurate interpretation of postoperative spine imaging requires understanding surgical indications, procedures, instrumentation, and clinical context.
• Baseline radiographs are essential for monitoring implant position and integration.
• Appropriate selection of imaging modalities (X-ray, MRI, CT) is critical for timely and accurate diagnosis.