Abdelrahman Ahmed S, Madkour Sherihan S, Ekladious Mena E Y
Department of Radiology, Faculty of Medicine, Ain Shams University, Cairo, Egypt.
Pol J Radiol. 2022 Jun 13;87:e316-e324. doi: 10.5114/pjr.2022.117590. eCollection 2022.
The liver imaging reporting and data system (LI-RADS) is a structured reporting system that categorizes hepatic observations according to major imaging features and lesion size, with an optional ancillary features contribution. This study aimed to evaluate inter-reader agreement of dynamic magnetic resonance imaging (MRI) using LI-RADS v2018 lexicon.
Forty-nine patients with 69 hepatic observations were included in our study. The major and ancillary features of each hepatic observation were evaluated by 2 radiologists using LI-RADS v2018, and the interreader agreement was allocated.
The inter-reader agreement of major LI-RADS features was substantial; κ of non-rim arterial hyperenhancement, non-peripheral washout appearance, and enhancing capsule was 0.796, 0.799, and 0.772 ( < 0.001), respectively. The agreement of the final LI-RADS category was substantial with κ = 0.651 ( < 0.001), and weighted κ = 0.786 ( < 0.001). The inter-reader agreement of the ancillary features was substantial to almost perfect (k range from 0.718 to 1; < 0.001). An almost perfect correlation was noted for the hepatic lesion size measurement with ICC = 0.977 ( < 0.001).
The major and ancillary features of the LI-RADS v2018, as well as the final category and lesions size, have substantial to almost perfect inter-reader agreement.
肝脏影像报告和数据系统（LI-RADS）是一种结构化报告系统，根据主要影像特征和病变大小对肝脏观察结果进行分类，并可选择辅助特征。本研究旨在评估使用LI-RADS v2018词典的动态磁共振成像（MRI）阅片者间的一致性。
本研究纳入了49例有69个肝脏观察结果的患者。由2名放射科医生使用LI-RADS v2018评估每个肝脏观察结果的主要和辅助特征，并确定阅片者间的一致性。
LI-RADS主要特征的阅片者间一致性较高；非边缘动脉期强化、非周边廓清表现和强化包膜的κ值分别为0.796、0.799和0.772（P<0.001）。最终LI-RADS分类的一致性较高，κ=0.651（P<0.001），加权κ=0.786（P<0.001）。辅助特征的阅片者间一致性较高至几乎完全一致（κ范围为0.718至1；P<0.001）。肝脏病变大小测量的相关性几乎为完美，组内相关系数（ICC）=0.977（P<0.001）。
LI-RADS v2018的主要和辅助特征，以及最终分类和病变大小，在阅片者间具有较高至几乎完全的一致性。
