The antero posterior or AP view or supinated view [Figure 14] has its specific applications in evaluating wrist pathology. It profiles the scapholunate and lunotriquetral carpal interspaces best and hence used to evaluating them. It is also used when the patient cannot pronate and fingers cannot be fully extended. 

Bhat, A., Kumar, B., & Acharya, A. (2011). Radiographic imaging of the wrist. Indian Journal of Plastic Surgery, 44(2): 186–196. Retreived from http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3193630/.