Computerized tomography after internal fixation of the spine

Area of Science:

• Orthopedic Surgery
• Radiology
• Medical Imaging

Background:

• Internal fixation is a common surgical procedure for spinal stabilization.
• Postoperative imaging is crucial for assessing surgical outcomes and complications.
• Computerized tomography (CT) is frequently used for evaluating spinal surgeries.

Purpose of the Study:

• To evaluate the utility of postoperative computerized tomography (CT) in assessing patients who underwent internal fixation of the spine.
• To identify the limitations and benefits of CT in visualizing metallic osteosynthetic material, bony structures, and soft tissues.
• To determine the effectiveness of contrast media in improving soft tissue visualization.

Main Methods:

• Retrospective analysis of 32 patients who underwent internal spinal fixation.
• Postoperative examination using computerized tomography (CT).
• Assessment of image quality for metallic hardware, bony structures, and soft tissues (intraspinal and extraspinal).
• Evaluation of the impact of intrathecal contrast medium on soft tissue imaging.

Main Results:

• Metallic osteosynthetic material was clearly visualized in all 32 patients.
• Bony structures were well-defined in 27 patients.
• Soft tissue imaging was degraded by scattering artifacts in 14 out of 20 examinations.
• Intrathecal contrast medium improved the evaluation of intraspinal soft tissues.
• Extraspinal soft tissue involvement was interpretable based on vertebral osseous destruction.

Conclusions:

• Postoperative CT is effective for visualizing spinal fixation hardware and bony integrity.
• CT imaging artifacts pose a challenge for soft tissue evaluation, particularly extraspinal.
• Intrathecal contrast administration enhances the assessment of intraspinal soft tissues, aiding in the detection of complications.