CAMRT Radiography Practice Exam

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Which projection will best demonstrate an injury to the right anterior ribs?

AP projection
PA projection
Right lateral projection
Oblique projection

The correct answer is: PA projection

The best choice for demonstrating an injury to the right anterior ribs is the PA projection. This projection allows for optimal visualization of the anterior (front) aspect of the ribs. In a PA projection, the patient is positioned face down, aligning the anterior ribs directly in the path of the X-ray beam, which provides a clearer and more defined image of the anterior rib structure compared to other projections. The reason this projection is advantageous is due to the fact that it minimizes distortion and superimposition of surrounding structures, allowing for better differentiation of any rib fractures or pathologies. Additionally, the PA projection effectively places the rib cage in an orientation that maximizes detail of the anterior ribs, which is crucial for detecting subtle injuries or fractures. While other projections have their benefits—such as lateral projections for visualizing the posterior ribs or oblique projections for assessing rib angles—the PA projection specifically targets the anterior ribs, making it ideal for this purpose.