Alex Simotas, MD

Hospital for Special Surgery
Board Certified Physiatrist
Specializing In Spine & Sports Medicine

Home > Diagnosis > Dual-photon Absorptiometry

Dual-photon Absorptiometry

Dual-photon absorptiometry (DPA), a test for osteoporosis, has been mostly replaced by dual-energy X-ray absorptiometry (DEXA). DPA measures bone density in the spine, hip, or total body using a photon beam. Although accurate for predicting fracture risk, precision is poor.