How subjective CT image quality assessment becomes surprisingly reliable: pairwise comparisons instead of Likert scale

ConclusionThe PC method is more reliable for subjective IQ assessment indicated by improved inter- and intraobserver agreement.Clinical relevance statementThis study shows that the pairwise comparison method is a more reliable method for subjective image quality assessment. Improved reliability is of key importance for optimization studies, validation of automatic image quality assessment algorithms, and training of AI algorithms.Key Points• Subjective assessment of diagnostic image quality via Likert scale has limited reliability.• A pairwise comparison method improves the inter- and intraobserver agreement.• The pairwise comparison method is more reliable for CT optimization studies.Graphical Abstract
Source: European Radiology - Category: Radiology Source Type: research