an introduction of the Greulich and Pyle for BAA

Greulich and Pyle is a method used for bone age assessment (BAA) in children and adolescents. This method was developed in the 1950s and is based on the radiographic analysis of the left hand and wrist bones. The purpose of BAA is to determine the skeletal maturity of a child, which is an important indicator of growth and development. The Greulich and Pyle method involves comparing the radiographs of the child's hand and wrist bones with a standard reference set of images to determine their bone age. The method is widely used in clinical practice for monitoring growth and development, assessing endocrine disorders, and evaluating skeletal dysplasias. The accuracy and reliability of the Greulich and Pyle method have been validated through numerous studies, making it a trusted tool for BAA in pediatric patients