肝脏小血管瘤患者MRI动态增强和弥散成像表现特征*

doi:10.3969/j.issn.1672-5069.2024.01.029

摘要/Abstract

摘要： 目的分析肝脏血管瘤(HH)病灶MRI动态增强和弥散成像表现特征。方法 2022年1月～2023年3月我院诊断的肿瘤直径≤2 cm的HH患者113例,所有患者接受肝脏MRI动态增强和弥散成像扫描,分析MRI动态增强和弥散成像表现,记录表观弥散系数(ADC)及最大上升斜率(MSI)、正性增强积分(PEI)和平均强化时间(MET)。结果在113例肝脏小血管瘤患者中发现158个病灶,单发病灶占78.8%,病灶大小为(1.7±0.4)cm;根据动态增强扫描曲线类型分布,发现Ⅰ型病灶27个,Ⅱ型病灶29个,Ⅲ型病灶102个;肝脏左叶病灶71个,右叶病灶87个;肝脏小血管瘤动脉期和门静脉期强化不明显,与肝实质相比总体呈持续相对低信号,延迟期呈轻微高信号,表现为轻中度延迟强化为主;MRI动态增强扫描结果发现,肝脏小血管瘤病灶MSI、PEI和MET分别为(321.0±33.6)、(256.6±30.7) 和(535.9±61.3)s;MRI弥散成像扫描结果发现,肝脏小血管瘤病灶ADC值为(2.4±0.4)×10^-3mm²/s。结论 MRI动态增强和弥散成像对肝脏小血管瘤有较大的诊断价值,可作为临床诊断的重要参考依据。

关键词: 肝脏小血管瘤, MRI动态增强扫描, 弥散成像, 表现特征, 诊断

Abstract: Objective The aim of this study was to summarize the feature of MRI dynamic enhancement and diffusion weighted imaging in patients with small hepatic hemangioma (sHH). Methods A total of 113 patients with ≤2 cm sHH were enrolled in the hospital between January 2022 and March 2023, and all underwent MRI dynamic enhancement and diffusion weighted imaging (DWI) scans. The feature of MRI dynamic enhancement and DWI were summarized. The apparent diffusion coefficient (ADC), maximum slop of increase (MSI), positive enhancement integral (PEI) and mean time to enhancement (MET) were recorded. Results Out of the 113 patients with sHH, 158 lesions were found by MRI scan, and the proportion of single lesions accounted for 78.8%; the lesion size were (1.7±0.4) cm; according to the distribution of curve types by dynamic contrast enhancement, there were 27 lesions of type I, 29 lesions of type II and 102 lesions of type III; there were 71 lesions in the left lobe and 87 lesions in the right lobe; on dynamic contrast-enhanced MRI, sHH were not significantly enhanced at arterial phase and portal venous phase; compared with liver parenchyma, the lesions generally showed continuous relatively low signal, and slight high signal in delayed phase, presenting with mainly mild to moderate delayed enhancement; the MRI dynamic enhancement scan showed that the MSI, PEI and MET in patients with sHH were(321.0±33.6), (256.6±30.7) and (535.9±61.3)s; the DWI scan showed that ADC in patients with sHH was (2.4±0.4) ×10^-3mm²/s. Conclusion The dynamic contrast-enhanced MRI and DWI scan could provide an important tool for clinical diagnosis of patients with sHH.

Key words: Hepatic hemangioma, MRI dynamic enhancement scan, Diffusion weighted imaging, Feature, Diagnosis

贾素兰, 卢昊宁, 杜静波. 肝脏小血管瘤患者MRI动态增强和弥散成像表现特征^*[J]. 实用肝脏病杂志, 2024, 27(1): 113-116.

Jia Sulan, Lu Haoning, Du Jingbo. Feature of MRI dynamic enhancement and diffusion weighted imaging in patients with small hepatic hemangioma[J]. Journal of Practical Hepatology, 2024, 27(1): 113-116.

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肝脏小血管瘤患者MRI动态增强和弥散成像表现特征^*

Feature of MRI dynamic enhancement and diffusion weighted imaging in patients with small hepatic hemangioma

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