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评估高时间和空间分辨率动态对比增强磁共振成像在胶质瘤患者中的可重复性。

Assessing the reproducibility of high temporal and spatial resolution dynamic contrast-enhanced magnetic resonance imaging in patients with gliomas.

机构信息

Department of Radiology, Seoul National University College of Medicine, 28, Yongon-dong, Chongno-gu, Seoul, 110-744, Korea.

Department of Biomedical Engineering, Sungkyunkwan University, Suwon, Korea.

出版信息

Sci Rep. 2021 Dec 1;11(1):23217. doi: 10.1038/s41598-021-02450-5.

Abstract

Temporal and spatial resolution of dynamic contrast-enhanced MR imaging (DCE-MRI) is critical to reproducibility, and the reproducibility of high-resolution (HR) DCE-MRI was evaluated. Thirty consecutive patients suspected to have brain tumors were prospectively enrolled with written informed consent. All patients underwent both HR-DCE (voxel size, 1.1 × 1.1 × 1.1 mm; scan interval, 1.6 s) and conventional DCE (C-DCE; voxel size, 1.25 × 1.25 × 3.0 mm; scan interval, 4.0 s) MRI. Regions of interests (ROIs) for enhancing lesions were segmented twice in each patient with glioblastoma (n = 7) to calculate DCE parameters (K, V, and V). Intraclass correlation coefficients (ICCs) of DCE parameters were obtained. In patients with gliomas (n = 25), arterial input functions (AIFs) and DCE parameters derived from T2 hyperintense lesions were obtained, and DCE parameters were compared according to WHO grades. ICCs of HR-DCE parameters were good to excellent (0.84-0.95), and ICCs of C-DCE parameters were moderate to excellent (0.66-0.96). Maximal signal intensity and wash-in slope of AIFs from HR-DCE MRI were significantly greater than those from C-DCE MRI (31.85 vs. 7.09 and 2.14 vs. 0.63; p < 0.001). Both 95 percentile K and V from HR-DCE and C-DCE MRI could differentiate grade 4 from grade 2 and 3 gliomas (p < 0.05). In conclusion, HR-DCE parameters generally showed better reproducibility than C-DCE parameters, and HR-DCE MRI provided better quality of AIFs.

摘要

动态对比增强磁共振成像(DCE-MRI)的时间和空间分辨率对可重复性至关重要,本研究旨在评估高分辨率(HR)DCE-MRI 的可重复性。

连续 30 例疑似脑肿瘤的患者签署了知情同意书后入组前瞻性研究。所有患者均接受 HR-DCE(体素大小 1.1×1.1×1.1mm;扫描间隔 1.6s)和常规 DCE(C-DCE;体素大小 1.25×1.25×3.0mm;扫描间隔 4.0s)MRI 检查。7 例胶质母细胞瘤患者(glioblastoma)的增强病变区(ROI)分别进行两次分割,以计算 DCE 参数(K、V 和 V)。

获得 DCE 参数的组内相关系数(ICC)。在 25 例胶质瘤患者中,获得了动脉输入函数(AIF)和 T2 高信号病变的 DCE 参数,并根据 WHO 分级比较了 DCE 参数。HR-DCE 参数的 ICC 为良好至优秀(0.84-0.95),C-DCE 参数的 ICC 为中度至优秀(0.66-0.96)。HR-DCE MRI 的最大信号强度和 AIF 的上升斜率明显大于 C-DCE MRI(31.85 比 7.09 和 2.14 比 0.63;p<0.001)。HR-DCE 和 C-DCE MRI 的 95%百分位数 K 和 V 均能区分 4 级和 2、3 级胶质瘤(p<0.05)。

总之,HR-DCE 参数的可重复性一般优于 C-DCE 参数,HR-DCE MRI 提供了更好的 AIF 质量。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bc50/8636480/25ff77415492/41598_2021_2450_Fig1_HTML.jpg

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