Abdel Razek Ahmed Abdel Khalek, El-Serougy Lamiaa Galal, Saleh Gehad Ahmad, Abd El-Wahab Rihame, Shabana Walaa
From the Departments of Diagnostic Radiology.
Tropical Medicine, Mansoura Faculty of Medicine, Mansoura, Egypt.
J Comput Assist Tomogr. 2020 Jan/Feb;44(1):118-123. doi: 10.1097/RCT.0000000000000945.
This study aimed to assess the interobserver agreement of magnetic resonance (MR) imaging of Liver Imaging Reporting and Data System version 2018 (LI-RADS v2018).
Retrospective analysis was done for 119 consecutive patients (77 male and 42 female) at risk of hepatocellular carcinoma who underwent dynamic contrast MR imaging. Image analysis was done by 2 independent and blinded readers for arterial phase hyperenhancement, washout appearance, enhancing capsule appearance, and size. Hepatic lesions were classified into 7 groups according to LI-RADS v2018.
There was excellent interobserver agreement of both reviewers for LR version 4 (κ = 0.887, P = 0.001) with 90.76% agreement. There was excellent interobserver agreement for nonrim arterial phase hyperenhancement (κ = 0.948; 95% confidence interval [CI], 0.89-0.99; P = 0.001), washout appearance (κ = 0.949; 95% CI, 0.89-1.0; P = 0.001); and enhancing capsule (κ = 0.848; 95% CI, 0.73-0.97; P = 0.001) and excellent reliability of size (interclass correlation, 0.99; P = 0.001). There was excellent interobserver agreement for LR-1 (κ = 1.00, P = 0.001), LR-2 (κ = 0.94, P = 0.001), LR-5 (κ = 0.839, P = 0.001), LR-M (κ = 1.00, P = 0.001), and LR-TIV (κ = 1.00; 95% CI, 1.0-1.0; P = 0.001), and good agreement for LR-3 (κ = 0.61, P = 0.001) and LR-4 (κ = 0.61, P = 0.001).
MR imaging of LI-RADS v2018 is a reliable imaging modality and reporting system that may be used for standard interpretation of hepatic focal lesions.
本研究旨在评估肝脏影像报告和数据系统2018版（LI-RADS v2018）磁共振成像（MR）的观察者间一致性。
对119例有肝细胞癌风险且接受动态对比增强MR成像的连续患者（77例男性和42例女性）进行回顾性分析。由2名独立且不知情的阅片者对动脉期强化、廓清表现、强化包膜表现及大小进行图像分析。根据LI-RADS v2018将肝脏病变分为7组。
两位阅片者对LR 4版的观察者间一致性极佳（κ = 0.887，P = 0.001），一致性为90.76%。对于非边缘动脉期强化（κ = 0.948；95%置信区间[CI]，0.89 - 0.99；P = 0.001）、廓清表现（κ = 0.949；95% CI，0.89 - 1.0；P = 0.001）、强化包膜（κ = 0.848；95% CI，0.73 - 0.97；P = 0.001）以及大小的可靠性极佳（组内相关系数，0.99；P = 0.001）。对于LR-1（κ = 1.00，P = 0.001）、LR-2（κ = 0.94，P = 0.001）、LR-5（κ = 0.839，P = 0.001）、LR-M（κ = 1.00，P = 0.001）和LR-TIV（κ = 1.00；95% CI，1.0 - 1.0；P = 0.001），观察者间一致性极佳，对于LR-3（κ = 0.61，P = 0.001）和LR-4（κ = 0.61，P = 0.001）一致性良好。
LI-RADS v2018的MR成像为可靠的成像方式和报告系统，可用于肝脏局灶性病变的标准解读。
