Multi-observer concordance and accuracy of the British Thoracic Society scale and other visual assessment qualitative criteria for solid pulmonary nodule assessment using FDG PET-CT

•British Thoracic Society scale of FDG uptake has good inter-observer agreement. •British Thoracic Society scale is as reliable as 3 and 5 point visual scales. •Visual assessment showed good agreement between reporters across institutions. •Semi-quantitative assessment did not improve the diagnostic accuracy. AIM To compare the interobserver reliability and diagnostic accuracy of the British Thoracic Society (BTS) scale and other visual...