Differentiating between Subsolid and Solid Pulmonary Nodules at CT: Inter- and Intraobserver Agreement between Experienced Thoracic Radiologists
[ABSTRACT READ IN FULL plus the author list and the complete reference list at pubs.rsna.org; body of the full text NOT READ, paywalled] Ridge, C. A., Yildirim, A., Boiselle, P. M., Franquet, T., Schaefer-Prokop, C. M., Tack, D., Gevenois, P. A., & Bankier, A. A. (2016). 'Differentiating between Subsolid and Solid Pulmonary Nodules at CT: Inter- and Intraobserver Agreement between Experienced Thoracic Radiologists.' Radiology, 278(3), 888-896. doi:10.1148/radiol.2015150714. THE STRONGEST INTRA-RATER FIGURE IN RADIOLOGY. Design, verbatim: 'Six thoracic radiologists, with a mean of 21 years of experience in thoracic radiology (range, 17-22 years), selected images of 10 solid and 10 subsolid nodules to create a database of 120 nodules; this selection served as the reference standard. Each radiologist then interpreted 120 randomly ordered nodules in two different sessions that were separated by a minimum of 3 weeks.' Each reader's own original classification is the reference standard, so the comparison is a radiologist against his or her own earlier judgement on the identical image. Results, verbatim: 'Interobserver agreement (kappa) was 0.619 (range, 0.469-0.745; 95% CI: 0.576, 0.663) and 0.670 (range, 0.440-0.839; 95% CI: 0.608, 0.733) for interpretation sessions 1 and 2, respectively. Intraobserver agreement (kappa) was 0.792 (95% CI: 0.750, 0.833). Averaged for interpretation sessions, correct classification was achieved by all radiologists for 58% (70 of 120) of nodules. Radiologists agreed with their initial determination (the reference standard) in 77% of cases (range, 45%-100%).' THAT 45 PER CENT IS THE MOST QUOTABLE NUMBER: one thoracic radiologist with seventeen to twenty-two years in the specialty agreed with his or her own prior reading of the same image on fewer than half of occasions. Conclusion: 'The reproducibility and accuracy of thoracic radiologists in
[ABSTRACT READ IN FULL plus the author list and the complete reference list at pubs.rsna.org; body of the full text NOT READ, paywalled] Ridge, C. A., Yildirim, A., Boiselle, P. M., Franquet, T., Schaefer-Prokop, C. M., Tack, D., Gevenois, P. A., & Bankier, A. A. (2016). 'Differentiating between Subsolid and Solid Pulmonary Nodules at CT: Inter- and Intraobserver Agreement between Experienced Thoracic Radiologists.' Radiology, 278(3), 888-896. doi:10.1148/radiol.2015150714. THE STRONGEST INTRA-RATER FIGURE IN RADIOLOGY. Design, verbatim: 'Six thoracic radiologists, with a mean of 21 years of experience in thoracic radiology (range, 17-22 years), selected images of 10 solid and 10 subsolid nodules to create a database of 120 nodules; this selection served as the reference standard. Each radiologist then interpreted 120 randomly ordered nodules in two different sessions that were separated by a minimum of 3 weeks.' Each reader's own original classification is the reference standard, so the comparison is a radiologist against his or her own earlier judgement on the identical image. Results, verbatim: 'Interobserver agreement (kappa) was 0.619 (range, 0.469-0.745; 95% CI: 0.576, 0.663) and 0.670 (range, 0.440-0.839; 95% CI: 0.608, 0.733) for interpretation sessions 1 and 2, respectively. Intraobserver agreement (kappa) was 0.792 (95% CI: 0.750, 0.833). Averaged for interpretation sessions, correct classification was achieved by all radiologists for 58% (70 of 120) of nodules. Radiologists agreed with their initial determination (the reference standard) in 77% of cases (range, 45%-100%).' THAT 45 PER CENT IS THE MOST QUOTABLE NUMBER: one thoracic radiologist with seventeen to twenty-two years in the specialty agreed with his or her own prior reading of the same image on fewer than half of occasions. Conclusion: 'The reproducibility and accuracy of thoracic radiologists in
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Ridge, C. A., Yildirim, A., Boiselle, P. M., Franquet, T., Schaefer-Prokop, C. M., Tack, D., Gevenois, P. A., & Bankier, A. A. (2016). Differentiating between Subsolid and Solid Pulmonary Nodules at CT: Inter- and Intraobserver Agreement between Experienced Thoracic Radiologists. Radiology, 278(3), 888-896. doi:10.1148/radiol.2015150714