Final answer:
The specific position that has been performed is the Lordotic Chest X-ray, where the patient leans the shoulders backwards to capture a specialized view of the chest.
Step-by-step explanation:
The specific position that has been performed in this scenario is the Lordotic Chest X-ray.
In this position, the patient is erect, facing the X-ray tube, and leaning the shoulders backward 20 to 30 degrees forward to the IR (Image Receptor). The central ray is perpendicular to the IR, capturing a specialized view of the chest.