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Fig. 2 | European Radiology Experimental

Fig. 2

From: Differentiation of vestibular schwannomas from meningiomas of the internal auditory canal using perilymphatic signal evaluation on T2-weighted gradient-echo fast imaging employing steady state acquisition at 3T

Fig. 2

a Axial T2W gradient-echo FIESTA-C in an obstructive VS of the left internal auditory canal. There is an important decrease of the perilymphatic signal, which was rated 2, compared with surrounding CSF and the contralateral side, in both the cistern (arrow) and the cochlea (arrow head). b Same patient. Coronal T2W gradient-echo FIESTA-C in an obstructive vestibular schwannoma. This coronal sequence also shows the marked drop of the perilymphatic signal in the cistern (empty arrow). The endolymphatic signal in both the saccule (arrow) and the utricle (curved arrow) appears normal. c Same patient. Axial T2W gradient-echo FIESTA-C showing the normal signal of the utricle (arrow). Note that the signal of perilymph the lateral semi-circular canal (empty arrow) is also decreased, even though we chose not to analyse this perilymphatic compartment individually. d Same patient. Axial T1W image after intravenous gadolinium injection, showing the vestibular schwannoma in the IAC and confirming the absence of intralabyrinthine extension of the tumour

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