Final answer:
To visualize the apices of the lungs without the clavicles overlapping, lordotic views or specific X-ray projections are utilized, positioning the clavicles above the lung apices for clear imaging.
Step-by-step explanation:
The position that demonstrates the apices of the lungs, without superimposition of the clavicles, is typically achieved through specific types of chest X-ray views such as the lordotic view. In a lordotic projection, the patient is positioned in such a way, sometimes by leaning backward while standing, that the X-ray beam is angled in a manner that allows for the clavicles to be projected above the apices of the lungs. This radiological technique is useful in visualizing the apical segments of the lungs to check for pathological conditions without the clavicles obscuring the view.
The clavicles, being S-shaped bones, lie horizontally across the front of the thorax just above the first rib and can obscure lung apices on standard X-ray images. Due to their location and anatomy, which includes articulation with the sternum and scapula, adjusting patient positioning and beam direction is necessary to visualize the uppermost parts of the lungs. The apices of the lungs are the superior region, whereas the bases are the opposite regions near the diaphragm, and these are best visualized in radiographic images when the clavicles are moved out of the way.