Summation of ossification ratios of the distal radius, distal ulna, and proximal radius: a novel parameter for pediatric bone age assessment.
BACKGROUND The Greulich-Pyle atlas is generally used in clinical practice; however, it involves radiation exposure. Our aim was to clarify the correlation between ultrasonic ossification ratios (ORs) and radiographic bone age, and to develop a repeatable ultrasonic parameter for assessing bone age. OBJECTIVE To deter...