Today, I review, link to, and excerpt from my Google Search: “Pancreatic-Protocol CT Scan”. And I link to some of the sites listed in the above webpage.
All that follows is from the above resource.
A CT pancreas protocol is a specialized, multiphase imaging study optimized to visualize the pancreas, using thin slices and intravenous (IV) contrast. It typically includes a late arterial phase (35–45 seconds post-injection) and a portal venous phase (65–70 seconds) to maximize contrast between normal tissue and lesions. [1, 2, 3]Patient Preparation
- Oral Contrast: Often, negative or neutral contrast (such as 400-800 mL of water) is used instead of positive contrast, which can obscure subtle tumors or stents. [1, 2]
- Contraindications: Notify the technologist of kidney function issues (GFR levels), Metformin use, and any allergies to iodine-based contrast. [1, 2, 3]
Acquisition & Contrast Phases
- Unenhanced (Optional): Sometimes used to screen for calcifications or hemorrhaging prior to contrast. [1, 2, 3, 4]
- Late Arterial/Pancreatic Phase: Scans ≈ 40 seconds after the IV injection. This phase provides the highest contrast between the normally enhancing pancreatic parenchyma and hypovascular tumors like adenocarcinoma. [1, 2]
- Portal Venous Phase: Scans at ≈ 70 seconds. This phase is critical for evaluating liver metastases and checking for vascular invasion or patency. [1, 2, 3, 4]
Institutional GuidelinesProtocols vary based on your specific scanner hardware, but you can review these sample workflows:
- For a standard breakdown of the multiphase approach, refer to the Radiopaedia CT Pancreas Protocol.
- For detailed coverage criteria and staging, view the Radiology Assistant Pancreas Staging Guide.
- View a detailed clinical example in this TRA Medical Imaging 3-Phase PDF.
