论文部分内容阅读
目的探讨增强液体衰减反转恢复(FLAIR)序列在诊断脑膜瘤中的价值。资料与方法38例脑膜瘤患者行增强T1WI和FLAIR成像,比较两种序列增强图像上脑膜瘤的强化方式、“脑膜尾征”的显示、肿瘤强化程度、肿瘤与白质及肿瘤与灰质的对比率(CR)和对比噪声比(CNR)。结果38例中25例(65.8%)在增强FLAIR上呈环状强化,而增强T1WI上仅7例(18.4%)呈环状强化。“脑膜尾征”在增强FLAIR和增强T1WI上的显示率分别为36.8%和47.4%。肿瘤在增强FLAIR和增强T1WI上强化程度分别为57.0和301.3,两者间差异有统计学意义(P<0.001)。增强FLAIR和增强T1WI上肿瘤与灰质CR分别为0.9和1.5,两种序列上肿瘤与白质的CNR分别为50.6和72.6,肿瘤与灰质CNR则为44.3和80.1,两种序列间差异均有统计学意义(P<0.001)。肿瘤与白质CR在两种序列间无差异。结论增强FLAIR有助于脑膜瘤包膜的显示和判断,但在显示肿瘤本身及“脑膜尾征”上不及增强T1WI。
Objective To investigate the value of enhanced fluid attenuation inversion recovery (FLAIR) sequence in the diagnosis of meningioma. Materials and Methods 38 cases of meningiomas underwent enhanced T1WI and FLAIR imaging, compared with two enhanced sequences of enhanced meningioma on the way, “the signs of meningeal tail”, the degree of tumor enhancement, tumor and white matter and tumor and gray matter Contrast ratio (CR) and contrast to noise ratio (CNR). Results Of the 38 cases, 25 (65.8%) showed ring enhancement on enhanced FLAIR and only 7 (18.4%) on enhanced T1WI showed ring enhancement. “Meningeal sign ” in the enhanced FLAIR and enhanced T1WI display rate of 36.8% and 47.4% respectively. The enhancement of tumor on enhanced FLAIR and enhanced T1WI were 57.0 and 301.3, respectively, with significant difference (P <0.001). The tumor CR and CR of enhanced FLAIR and enhanced T1WI were 0.9 and 1.5, respectively. The CNR of tumor and white matter in both sequences were 50.6 and 72.6, respectively. The CNR of tumor and gray matter were 44.3 and 80.1. The differences between the two sequences were statistically significant Significance (P <0.001). Tumor and white matter CR did not differ between the two sequences. Conclusions Enhanced FLAIR contributes to the display and judgment of meningiomas but not to T1WI on both the tumor itself and the “meningioma”.