CAJ | 학술논문

目的分析磁共振成像(MRI)表现不典型的肝小血管瘤(≤2 cm)在动态增强及弥散成像中的表现特点,提高诊断的准确性.方法回顾性分析经病理证实的14例患者14个MRI表现不典型的肝脏小血管瘤病灶.分别观测其MRI动态增强扫描、弥散成像表现,比较动态增强各期小血管瘤的对比噪声比,小血管瘤、主动脉、门静脉的信号噪声比,及弥散加权成像中小血管瘤、肝组织的ADC值、病灶-肝组织相对信号比等.进而综合评价此类小血管瘤的MRI表现特点及鉴别诊断要点.结果动态增强中,小血管瘤持续呈相对低信号,以轻度延迟强化为主,其与主动脉、门静脉在动态增强各期信号噪声比变化间存在统计学差异(P＜0.05).弥散成像中,小血管瘤的信号高于肝组织,其总体上具有较肝组织高的ADC值(P＜o.01).结论 MRI动态增强扫描、弥散成像、ADC值测定等对于肝脏不典型小血管瘤的诊断及鉴别具有重要作用.
목적 분석자공진성상(MRI)표현불전형적간소혈관류(≤2 cm)재동태증강급미산성상중적표현특점,제고진단적준학성.방법 회고성분석경병리증실적14례환자14개MRI표현불전형적간장소혈관류병조.분별관측기MRI동태증강소묘、미산성상표현,비교동태증강각기소혈관류적대비조성비,소혈관류、주동맥、문정맥적신호조성비,급미산가권성상중소혈관류、간조직적ADC치、병조-간조직상대신호비등.진이종합평개차류소혈관류적MRI표현특점급감별진단요점.결과 동태증강중,소혈관류지속정상대저신호,이경도연지강화위주,기여주동맥、문정맥재동태증강각기신호조성비변화간존재통계학차이(P＜0.05).미산성상중,소혈관류적신호고우간조직,기총체상구유교간조직고적ADC치(P＜o.01).결론 MRI동태증강소묘、미산성상、ADC치측정등대우간장불전형소혈관류적진단급감별구유중요작용.
Objectives To analyse the radiological features of dynamic MRI and diffusion weighted imaging for atypical small hepatic hemangiomas (≤2 cm).Methods The MR images of 14 patients with 14 pathologically-confirmed small atypical hepatic hemangiomas were retrospectively analyzed.All these patients underwent MR imaging including plain T1 weighted imaging,T2 weighted imaging,dynamic contrast enhanced scanning,and diffusion weighted imaging.The signal-to-noise ratios of hemangiomas,the portal vein and the aorta,lesion-to-liver contrast-to-noise ratios,ADCs of hemangiomas and the liver,lesion-to-liver signal ratios in DWI were assessed to generalize the MRI features and the key points in differential diagnosis of this type of hepatic hemangioma.Results In dynamic contrast enhanced scanning,the atypical hemangiomas were barely enhanced and they were hypointense most of the time.The lesions might show a faint enhancement in the delayed phase.There were significant differences in the changes in signal-to-noise ratio between hemangiomas and aorta as well as portal vein in all the three phases (P＜0.05).In DWI,the signal intensities and ADCs of the hemangiomas were higher than the liver parenchyma (P＜0.01).Conclusions MRI dynamic contrast enhanced scanning,diffusion weighted imaging and evaluation of the ADCs were important in the diagnosis and differential diagnosis of small atypical hepatic hemangiomas.