Final answer:
The specific position/projection that has been performed is 1. Right lateral decubitus position.
Step-by-step explanation:
The specific position/projection that has been performed is 1. Right lateral decubitus position.
In this position, the patient is lying on her right side on a cart with the anterior surface of the body against the image receptor. The central ray enters the posterior surface and exits the anterior surface of the body.
The right lateral decubitus position is commonly used in medical imaging to assess the condition of the thorax or abdomen, as well as for evaluating certain medical conditions.