Radiostereometric Analysis for Assessment of Orthopedic Implant Position

This policy covers radiostereometric analysis (RSA), a technique using implanted radio‑opaque markers (typically tantalum) with paired stereo x‑rays and analytic software to quantify 3‑D position, migration, wear, and relative motion of orthopedic implants and adjacent bone or soft tissues after procedures such as total joint replacement, fracture fixation, soft‑tissue repair, and spine fusion/instability. Major limitations/requirements: RSA is considered experimental/investigational with limited and variable evidence, and it requires specialized dual‑X‑ray hardware, expensive software, implanted markers and interpretation by trained physicians, which limits routine clinical use.

"Detection and monitoring of changes in orthopedic implant position (e."

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