CAMRT Radiography Practice Exam

What projection is most effective for demonstrating the floor of the orbits?

1. Parietoacanthial

2. Modified waters

3. Lateral

4. PA

The correct answer is: Modified waters

The modified waters projection is particularly effective for demonstrating the floor of the orbits due to its specific positioning requirements. In this projection, the patient's orbit is positioned at a more advantageous angle relative to the X-ray beam, allowing for a clearer view of the orbital structures. The modified waters projection involves the patient's chin being extended upward, which lowers the orbits and allows the X-ray beam to pass through this area more effectively, minimizing distortion. The orientation of the beam in this position also enhances the visualization of the maxillary sinuses and the orbital floors, which are crucial in the assessment of any fractures or pathological conditions associated with these areas. The modification from the standard waters projection, typically involving the chin position, creates a more perpendicular alignment to the floor of the orbit, thus showcasing any abnormalities or details in that area more distinctly. In contrast, while other projections might provide some view of the orbit, they may not optimize the imagery of the orbital floor in the same way the modified waters projection does, which specifically targets this anatomical feature.