1. Standard Scan: Multi-slice continuous scanning, requiring no external factors. Slice thickness is usually 2mm, but in special cases, 1mm thin-slice scanning or 3D reconstruction can be used.
2. Enhanced Scan: Scanning is performed after intravenous injection of water-soluble iodine contrast agent. An iodine allergy test is required before the examination, and attention should be paid to possible adverse reactions.
3. Spinal Cordography CT Scan: Scanning is performed 4-6 hours after spinal canal puncture and injection of contrast agent to allow for uniform diffusion of the contrast agent and obtain optimal image quality.