Final answer:
The PA axial projection wrist using the Stecher method targets the superficial anterior compartment of the forearm to evaluate the wrist's capability in various motions and to assess bones and soft tissues for pathological changes.
Step-by-step explanation:
The evaluation criteria for the PA axial projection wrist using the Stecher method is primarily based on the imaging of specific anatomical features. The target for this radiographic procedure is the superficial anterior compartment of the forearm. This method assists with the visualization of the wrist and related structures, which allows for the assessment of the wrist's ability to bend toward the body, the action of tilting the wrist, and the hand to the side away from the body. Additionally, it evaluates the ability of the forearm to help in bending the hand up toward the shoulder, tilting the hand to the side away from the body, and stabilizing the wrist while bending the fingers to make a fist.
Key evaluation points would include the proper representation of the carpal bones without superimposition, correct angulation to visualize the scaphoid without foreshortening, and adequate soft tissue and bone trabeculation. The Stecher method provides a clear view of the wrist's bone structures and assists in diagnosing fractures, bone displacements, or other pathological processes.