Which examination may utilize the transthoracic projection?

The transthoracic projection is particularly relevant for imaging the humerus, especially when the standard anteroposterior (AP) view is compromised due to trauma or other factors that may prevent proper positioning of the arm. This projection allows for clearer visualization of the proximal humerus and humeral head, which can be obscured in certain views.

In addition to providing a detailed image of the humerus, the transthoracic method utilizes the thoracic cavity to enhance the quality of the image through a different angle, which is especially useful in cases of fractures or dislocations in that area. The other projections listed—such as the lateral tibia, anteroposterior femur, and lateral radius—do not typically employ the transthoracic technique, as they focus on different parts of the anatomy where such an approach is not necessary or beneficial.