The most commonly used method in the United States is the Greulich and Pyle (G&P) Hand Atlas, unchanged from its initial publication in 1950s. The determination of bone age plays an important role in diagnostic and therapeutic investigations of endocrine problems and growth disorders of children.
Bone age assessment (BAA) is a clinical procedure frequently performed in pediatric radiology to evaluate the stage of skeletal maturation based on a left hand and wrist radiograph.