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- W2374021568 abstract "Objective To analyze the features of dynamic MRI and diffusion weighted imaging of small hepatic hemangiomas(≤2 cm).Methods MR images of 30 patients with 42 pathologically confirmed small hepatic hemangiomas were retrospectively analyzed.Hemangiomas were classified into 3 types based on their dynamic enhanced patterns: type Ⅰ,typical hemangiomas;type Ⅱ,high flow hemangiomas;and type Ⅲ,atypical hemangiomas.All of them underwent MR imaging including plain T1 weighted imaging,T2 weighted imaging,dynamic contrast enhanced scanning,and diffusion weighted imaging.Signal to noise ratios of hemangiomas and the portal vein,lesion to liver contrast to noise ratios,ADCs of hemangiomas,lesion to liver signal ratios in DWI were assessed in order to generalize the MRI features and key points in differential diagnosis of small hepatic hemangiomas.Results In dynamic contrast enhanced scanning,type I hemangiomas(n = 21) showed relatively high signals in all three phases and the signals rose and dropped slowly.Type Ⅱ hemangiomas(nn = 7) showed relatively high signals in all phases and the signals rose rapidly and dropped slowly.Type Ⅲ hemangiomas(n = 14) were barely enhanced and kept hypointense most of time,and might show a faint enhancement on delayed phase.There were no significant differences in signal to noise ratios between type Ⅱ hemangiomas and the portal vein in all three phases,while differences existed between type Ⅰ,type Ⅲ hemangiomas and the portal vein(P = 0.046 and P = 0.002).In DWI,the signal intensities and ADCs of hemangiomas were higher than those of liver parenchyma,and mean ADCs were higher in type Ⅱ hemangiomas than type Ⅰ and type Ⅲ(P = 0.0034).Conclusion There are certain characteristics in MR images of small hepatic hemangiomas,dynamic contrast enhanced scanning,diffusion weighted imaging and evaluation of the ADCs play important roles in the diagnosis and differential diagnosis of them." @default.
- W2374021568 created "2016-06-24" @default.
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- W2374021568 date "2013-01-01" @default.
- W2374021568 modified "2023-09-23" @default.
- W2374021568 title "Study of Diagnostic Values of Dynamic MRI and Diffusion Weighted Imaging in Small Hepatic Hemangiomas( ≤2 cm)" @default.
- W2374021568 hasPublicationYear "2013" @default.
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