Khodaei M, Sayed T, Hill D, et al. - This study attempted to evaluate the test–retest, intra- and inter-rater reliabilities of ultrasound (US) reflection coefficient (RC) index measured in a lumbar vertebra to reflect bone strength on children with adolescents with idiopathic scoliosis. Researchers scanned 58 participants (47F; 11M) by a US imager in a standing position. They scanned 24 twice for a test–retest study. Three different methods were used to obtain five measurements: the maximum RC values on the left and right sides, the average RC values on the left and right sides, and the combined average RC from both sides. The results demonstrated that the RC index could be assessed repeatedly and reliably. The risk of progression of scoliosis may be decreased by the high RC value.