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Abstract #4293

Bosniak II-III Cystic Renal Masses: Subtraction MR Images for Improvement of Interobserver Agreement with Bosniak Classification, Version 2019

Huanhuan Kang1, Xu Bai2, Wei Xu1, Mengqiu Cui1, Shaopeng Zhou1, Baichuan Liu1, and Haiyi Wang1
1Radiology, the First Medical Center of Chinese PLA General Hospital, Beijing, China, 2Radiology, the Fifth Medical Center of Chinese PLA General Hospital, Beijing, China


The purpose of this study was to investigate whether subtraction MR images can improve the interobserver agreement for Bosniak II, IIF and III cystic renal masses (CRMs) with Bosniak classification, version 2019. The results showed that the interobserver agreement was higher with subtraction MR images than without subtraction MR images (weighted k = 0.73 vs 0.60, respectively; P=.011), which may contribute to the popularization and application of Bosniak classification, version 2019.

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