Greulich and pyle bone age atlas4/8/2023 ![]() ![]() ![]() After correcting these seven ratings, the root mean square error between manual and automatic rating in the 405 subjects was 0.71 years (range 0.66–0.76 years, 95% CI). They were re-rated blindly by two raters. Seven subjects showed a deviation between manual and automatic BA in excess of 1.9 years. BoneXpert’s estimate of GP BA was calibrated to agree on average with the manual ratings based on several studies, including the present study. A total of 226 boys with a BA of 3–17 years and 179 girls with a BA of 3–15 years were included in the study. Two observers determined GP BA with knowledge of the chronological age (CA). To validate the BoneXpert method for automatic determination of skeletal maturity of healthy children against manual GP BA ratings. There is rater variability, but the advent of automatic BA determination eliminates this. Bone age (BA) assessment is a routine procedure in paediatric radiology, for which the Greulich and Pyle (GP) atlas is mostly used. ![]()
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