The growth and development issues of children and adolescents have received increasing attention in recent years, and bone age measurement is of great significance for the healthy development and disease diagnosis of children and adolescents.At present, traditional X-ray is still used as the main method for bone age assessment both domestically and internationally, and as the gold standard.The main methods for evaluating bone age by X-ray include the counting method, graph method, and scoring method.However, traditional X-ray bone age assessment methods have drawbacks, such as radiation and time-consuming.New bone age assessment methods include ultrasound, dual-energy X-ray absorptiometry(DXA), magnetic resonance imaging (MRI), and artificial intelligence.This article reviews the current research status and progress of various imaging methods for evaluating bone age, to provide a basis for selecting appropriate bone age imaging methods in clinical practice.

Bone age; Ultrasound; X-ray of the wrist; Artificial intelligence