Low-dose metrizamide spinal computed tomography in outpatients.

Area of Science:

• Radiology
• Medical Imaging
• Neurosurgery

Background:

• Thecal sac delineation in CT scans can be challenging, especially in postoperative patients due to epidural scarring.
• Accurate visualization of the thecal sac is crucial for diagnosing spinal conditions.

Purpose of the Study:

• To evaluate the efficacy and safety of intrathecal metrizamide for improving thecal sac opacification in CT scans.
• To assess the utility of this technique in an outpatient setting.

Main Methods:

• Metrizamide-enhanced CT scans were performed on outpatients.
• A dose of 2.5 ml of metrizamide (170 mg I/ml) was administered intrathecally.
• Follow-up data was collected from 40 patients.

Main Results:

• Adequate opacification of the thecal sac was achieved in 92% of examined levels.
• Fair opacification was noted in the remaining levels.
• The procedure was well-tolerated, with minor adverse events reported (headache, vomiting).

Conclusions:

• Intrathecal metrizamide is a safe and useful technique for enhancing thecal sac visualization in CT.
• This method is particularly beneficial for postoperative patients with obscured anatomical landmarks.
• The procedure is suitable for outpatient administration.