Justification from literature

PROJECTION FOR RHEUMATOID ARTHRITIS

PA HAND X RAY

The Posteroanterior (PA) view is particularly valuable for evaluating rheumatoid arthritis (RA) because it provides a clear, comprehensive image of the hand and wrist bones, joints, and surrounding structures. It PA view captures all the critical joints commonly affected in RA, including:

i. Metacarpophalangeal (MCP) joints

ii. Proximal interphalangeal (PIP) joints

iii. Carpometacarpal (CMC) joints

iv. Radiocarpal (wrist) joints

It allows simultaneous assessment of bilateral hands, which is essential since RA is typically symmetrical.

The PA view helps track changes in joint structure and disease progression over time by comparing baseline and follow-up images.