CAMRT Radiography Practice Exam

Which position best demonstrates an abdominal aortic aneurysm?

1. Dorsal decubitus

2. Supine

3. Prone

4. Left lateral

The correct answer is: Dorsal decubitus

The dorsal decubitus position is particularly effective for demonstrating an abdominal aortic aneurysm because it allows for a lateral view of the abdomen. In this horizontal position, the aorta can be visualized more clearly as it runs from the diaphragm down to the pelvis. The alignment of the patient's body in this position minimizes the superimposition of other anatomical structures, providing a better assessment of the aorta’s diameter and any potential aneurysmal bulging. In contrast, while supine positioning is commonly used for various abdominal imaging studies, it may not provide the clearest view of the aorta's lateral aspect, where aneurysms are more easily identified. The prone position generally does not provide further advantages in demonstrating an abdominal aneurysm, as it can obscure the aorta from direct imaging. The left lateral position could be useful in certain evaluations but does not offer the optimal perspective for viewing the abdominal aorta in its entirety compared to the dorsal decubitus position.