扩散加权成像对肝局灶病变检出的多中心研究

发布时间：2018-03-17 17:24

  本文选题：肝疾病　切入点：磁共振成像　出处：《中国医学影像学杂志》2015年05期 　论文类型：期刊论文

【摘要】：目的评价扩散加权成像(DWI)在肝局灶性病变(FLL)检出中的价值。资料与方法选取205例FLL患者共310个病灶,均行T2WI、动态增强(DCE)及DWI检查,b值分别为100 s/mm2及600 s/mm2,2名评估者阅读每个病例所有序列图像,并对各序列对病灶的检出进行评分。分析2名评估者评估结果的一致性,比较各序列对病变检出的信心评分以及各序列对各类病变的检出率。结果对于T2WI、高b值DWI、低b值DWI、DCE序列的检出信心评分,2名评估者的一致性为一般或好(Kappa=0.71、0.85、0.82、0.64,P0.05)。对FLL检出信心的平均评分,高b值DWI及低b值DWI均明显高于T2WI(P0.01),但都低于DCE(P0.01)。DWI对FLL的检出评分及检出率均明显高于T2WI(86.5%比70.3%,P0.01),但低于DCE(91.6%,P0.05);对直径≤2 cm的恶性小病灶,DWI的检出率显著高于T2WI(P0.01),而与DCE相似(P0.05),DWI+DCE的检出率明显高于DWI或DCE(P0.01)。结论 DWI对肝局灶性病变的检出率高于T2WI,并可提高DCE对恶性小病灶的检出,应作为肝脏MRI检查的常规序列。
[Abstract]:Objective to evaluate the value of diffusion-weighted imaging (DWI) in the detection of focal hepatic lesions (FLL). Materials and methods: a total of 310 lesions were selected from 205 patients with FLL. Two evaluators with T2WI, dynamic enhanced DCEE (DCE) and DWI (100s / mm2 and 600s / mm2) read all the sequence images of each case, and scored the lesions detected by each sequence. The consistency of the evaluation results between the two evaluators was analyzed. Results for T2WI, high b DWI, low b DWI, low b DWI, the consistency of two evaluators was: general or good Kappa 0.71 / 0.820.64P 0.05. the consistency of the two evaluators was as follows: 0.71% 0.81% 0.820.64P0.050.Results for T2WI, high b value DWI, low b value DWI, the consistency of two evaluators was 0.71% or 0.71%, 0.820.64P0.05. The average score of confidence, Both high b value DWI and low b value DWI were significantly higher than that of T2WII P0.01T, but lower than that of DCE(P0.01).DWI in detecting FLL. The detection rate and detection rate of FLL were significantly higher than that of T2WIJ 86.5% vs 70.3%, but lower than that of DCE91.6 / P0.05.The detection rate of malignant small lesions with diameter 鈮，

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