CAMRT Radiography Practice Exam

What other position can be used for the sternum if the patient cannot assume the recumbent RAO position?

1. LAO

2. LPO

3. Left lateral decubitus

4. RPO

The correct answer is: LPO

In radiographic imaging, obtaining a good view of the sternum is crucial for accurate diagnosis. If a patient is unable to take the recumbent right anterior oblique (RAO) position, the left posterior oblique (LPO) position can be effectively used as an alternative. The reason the LPO position is suitable is that it also provides a tangential view of the sternum. This position allows the sternum to be projected away from the spine and into the heart shadow, minimizing overexposure and enhancing visualization. The patient is rotated slightly away from the imaging receptor, which is beneficial in creating that required projection. Other positions do not achieve the same angulation and displacement necessary for optimal imaging of the sternum. For example, a left anterior oblique (LAO) position does not provide as effective a view, as it may not sufficiently separate the sternum from the thoracic spine. Similarly, left lateral decubitus and right posterior oblique (RPO) positions are less favorable for visualizing the sternum due to their orientation, which can either compress the sternum against the spine or not provide the needed tangential view. Thus, using the left posterior oblique position effectively serves as a reasonable alternative for