CAMRT Radiography Practice Exam

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Approximately how many degrees should the patient be rotated for the PA oblique sternum projection?

30 to 40 degrees
10 to 15 degrees
15 to 20 degrees
45 to 50 degrees

The correct answer is: 15 to 20 degrees

For the PA oblique sternum projection, the patient should be rotated approximately 15 to 20 degrees. This specific degree of rotation is crucial for the optimal visualization of the sternum free from superimposition of the thoracic spine and surrounding structures. With this positioning, the sternum is projected over the heart and lungs, allowing for better clarity of the bony anatomy. In this projection, careful attention must be given to ensure that the sternum remains in profile, achieved by using this precise angle. Rotating the patient too much or too little may result in blurred images or overlapping anatomy, which would hinder accurate assessment and diagnosis. This technique also helps in improving the overall contrast and visibility of the sternum against the background structures, ensuring that radiologists and other healthcare professionals can make precise evaluations.