Interreader Agreement and Intermodality Concordance of O-RADS US and MRI for Assessing Large, Complex Ovarian-Adnexal Cysts

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Abstract

Purpose: To assess interreader agreement of the Ovarian-Adnexal Reporting and Data System (O-RADS) and intermodality concordance between US and MRI for characterizing complex adnexal cysts measuring 5 cm or larger. Materials and Methods: This retrospective study included 58 “complex cysts” measuring at least 5 cm in size observed at both US and MRI in 54 women (median age, 37 years ± 12 [SD]; seven postmenopausal women) between July 2017 and June 2020, identified from an electronic US database. A separate set of two blinded radiologists independently reviewed the US or MR images to assign the O-RADS category, and an adjudicator resolved discrepancies (a total of six readers). Lesion outcome (49 benign, eight malignant, one lost to follow-up) was recorded. Interreader agreement of O-RADS US and O-RADS MRI and concordance between US and MRI were analyzed. Results: Interreader agreement was fair for US (k = 0.31), moderate for MRI (k = 0.43), and moderate between US and MRI (k = 0.58). A significant positive correlation was found between O-RADS US and MRI (τ = 0.72, P

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Guo, Y., Phillips, C. H., Suarez-Weiss, K., Roller, L. A., Frates, M. C., Benson, C. B., & Shinagare, A. B. (2022). Interreader Agreement and Intermodality Concordance of O-RADS US and MRI for Assessing Large, Complex Ovarian-Adnexal Cysts. Radiology: Imaging Cancer, 4(5). https://doi.org/10.1148/rycan.220064

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