Highlights ■ Inflection point agreement was low to moderate amongnon-specialist raters. ■ Thoracolumbar junction showed the lowest inter-observeragreement. ■ Results support the need for protocol standardization and  structured training. ABSTRACT Objective: To assess the intra- and inter-observer reliability of spinal inflection point localization on lateral radiographs of asymptomatic adults using a standardized measurement protocol, given its important role in sagittal alignment analysis and its potential influence on biomechanical interpretation and surgical planning. Methods: This cross-sectional study included 10 adults (five […]