The CT Bastion protocol, also known as the Camp Bastion protocol, is a specialized computed tomography (CT) imaging technique primarily designed to provide comprehensive, multi-phase vascular imaging, often utilized in trauma settings for detailed abdominal assessment. This protocol is distinguished by its unique contrast injection regimen, which allows for simultaneous visualization of both arterial and portal venous phases during a single CT acquisition.
Key Components of the Protocol
The effectiveness of the CT Bastion protocol lies in its precise administration of intravenous contrast media and optimized timing of CT acquisition. This tailored approach ensures critical anatomical structures are well-opacified, aiding in accurate diagnosis.
The protocol involves two distinct phases of contrast injection:
| Bolus | Volume (ml) | Flow Rate (ml/s) |
|---|---|---|
| First | 65 | 2.0 |
| Second | 85 | 3.5 |
- CT Acquisition Timing: The CT scan is strategically acquired at 70 seconds from the start of the contrast administration. Crucially, the acquisition occurs while the second bolus of contrast is still actively inflowing. This specific timing allows for a mixed phase, providing enhanced visualization of both the arterial and portal venous systems simultaneously.
Purpose and Clinical Application
The primary purpose of the CT Bastion protocol is to achieve biphasic imaging—capturing both arterial and portal venous phases concurrently. This capability is particularly valuable in scenarios where rapid and comprehensive assessment of blood vessels and organs is critical, such as in:
- Trauma imaging: Identifying active bleeding, vascular injuries, and organ damage in the abdomen.
- Oncology: Evaluating tumor vascularity and extent, especially in organs like the liver and pancreas where dual-phase imaging is beneficial.
- Vascular pathology: Diagnosing conditions like aneurysms, dissections, and thromboses that require detailed arterial and venous visualization.
By providing imaging in both phases, the protocol aids clinicians in making informed decisions quickly, which can be vital in time-sensitive medical emergencies. The standardized nature of the protocol helps ensure consistency and reliability in imaging results, contributing to improved patient outcomes.
