When acute AAA rupture is suspected in a hemodynamically stable patient, which of the following is the imaging modality of choice?

In the case of suspected acute abdominal aortic aneurysm (AAA) rupture in a hemodynamically stable patient, a CT scan is the preferred imaging modality due to its speed, sensitivity, and ability to provide a detailed view of the aorta and surrounding structures. A CT scan can rapidly assess the presence of blood in the retroperitoneal space, identify the size and location of the aneurysm, and evaluate for any signs of rupture.

The significance of a CT scan lies in its ability to not only confirm the diagnosis of a ruptured AAA but also to offer information that can guide surgical intervention, such as the nature of the rupture and any potential complications. It provides high-resolution images that can assist in planning the appropriate operative approach, which is critical in emergency situations.

While MRI can offer excellent soft tissue contrast, it is not routinely used in emergencies due to longer acquisition times and lesser availability in acute care settings. Doppler ultrasound can be useful for assessing blood flow and detecting aneurysms, but it is operator-dependent and may not provide the comprehensive anatomical visualization required in this scenario. Digital Subtraction Angiography (DSI) is more invasive and typically used in cases where therapeutic intervention is planned rather than solely for diagnosis, making