Differentiation between completely hyalinized uterine leiomyomas and ordinary leiomyomas: Three-phase dynamic magnetic resonance imaging (MRI) vs. diffusion-weighted MRI with very small b-factors
Differentiation between completely hyalinized uterine leiomyomas and ordinary leiomyomas: Three-phase dynamic magnetic resonance imaging (MRI) vs. diffusion-weighted MRI with very small b-factors
复制标题
DOI：
10.1002/jmri.20063
复制
发表时间：
2004-07-01
影响因子：
4.4
通讯作者：
Shibuya, H
中科院分区：
文献类型：
--
作者：
Shimada, K;Ohashi, I;Shibuya, H
目的：目的：探讨采用弥散加权（DW）磁共振成像（MRI）（DWI）和三期动态MRI相比较，采用非常小的b因子（B = 1.51和55.3 s/mm（2））鉴别完全透明化子宫肌瘤和普通子宫肌瘤的可能性。所有平滑肌瘤分为两个组织病理学亚型（5个完全透明化平滑肌瘤和47个普通平滑肌瘤）。对每一个平滑肌瘤，增强指数（EI）在三个阶段的动态MRI和表观扩散系数（ADC），然后compared.Results：EI在第二和第三动态阶段明确区分两种类型的平滑肌瘤没有重叠的价值。ADC值也可清楚区分两种类型的平滑肌瘤，且无重叠。结论：动态MRI三期扫描及b因子很小的DWI均能有效鉴别透明化平滑肌瘤与普通平滑肌瘤。
Purpose: To assess the possibility of differentiating between completely hyalinized leiomyomas and ordinary leiomyomas by using diffusion-weighted (DW) magnetic resonance imaging (MRI) (DWI) employing very small b-factors (b = 1.51 and 55.3 seconds/mm(2)) in comparison with three-phase dynamic MRI.Materials and Methods: The subjects were 25 patients with 52 histopathologically confirmed uterine leiomyomas. All leiomyomas were divided into two histopathologic subtypes (5 completely hyalinized leiomyomas and 47 ordinary leiomyomas). For each leiomyoma, the enhancement index (EI) at three-phase dynamic MRI and apparent diffusion coefficient (ADC) were obtained and then compared.Results: The EIs at second and third dynamic phases clearly differentiated the two types of leiomyomas without overlap of values. ADCs also clearly differentiated the two types of leiomyomas without overlap of values. Moreover, there were significant positive correlations between ADCs and EIs at all dynamic phases (r = 0.41-0.50, P < 0.01).Conclusion: Not only three-phase dynamic MRI but also DWI with very small b-factors could be useful for differentiating completely hyalinized leiomyomas from ordinary leiomyomas.