The right anterior oblique (RAO) position of the thorax could be used to demonstrate the:

The right anterior oblique (RAO) position of the thorax is particularly useful for visualizing the left axillary ribs. In this positioning, the patient's right side is turned towards the image receptor while the left side is angled away. This oblique position compacts the left ribs and positions them more perpendicularly to the imaging plate, enhancing their visibility on the radiograph. The orientation allows for a clearer contrast against surrounding structures, facilitating the identification of any abnormalities or fractures in the left axillary ribs.

This positioning technique not only aids in visualizing specific anatomical structures but also minimizes superimposition of the overlapping ribs, making it an effective method for rib examinations. Utilizing oblique positions in radiography is a common practice to obtain the best possible images of particular areas of interest, optimally displaying the anatomy specific to the designated angle.