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