Validity and Reliability of Ultrasound Imaging for Measuring Coronal and Sagittal Angles in Idiopathic Scoliosis

This study was structured into two fundamental segments: 1) a dual-operator analysis focused on evaluating both intra- and inter-operator reliability of the UCA and USLA; and 2) a validation study of radiographic indices, specifically the coronal Cobb angle, TK, and LL, in correlation with UCA and USLA measurements. Initially, 100 patients diagnosed with IS were subjected to both standard radiographic and 3D ultrasound examinations. Owing to various exclusion criteria, 20 patients were subsequently disqualified from the study, resulting in a final sample of 80 patients for statistical evaluation. Reliability assessments were conducted using the Intraclass Correlation Coefficient (ICC). Furthermore, the validity of the UCA and USLA measurements was rigorously analyzed by comparing them against established radiographic benchmarks, utilizing Pearson correlation coefficients and Bland-Altman plots for comprehensive evaluation. All expected or unexpected adverse events from this study will be recorded and monitored.For comprehensive analysis, participants were systematically categorized based on multiple demographic and clinical parameters: coronal angle (either ≥20° or \<20°), gender (male or female), age (either\>14 years or ≤14 years), and nutritional status (classified as normal or abnormal).