Intracranial epidermoid cysts: diffusion-weighted, FLAIR and conventional MR findings

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dc.contributor.authorYıldız, Harun
dc.contributor.authorAksoy, Ümit
dc.contributor.authorErgin, Necdet
dc.contributor.buuauthorHakyemez, Bahattin
dc.contributor.departmentUludağ Üniversitesi/Tıp Fakültesi/Radyoloji Anabilim Dalı.tr_TR
dc.contributor.orcid0000-0002-3425-0740tr_TR
dc.contributor.researcheridAAI-2318-2021tr_TR
dc.date.accessioned2021-07-02T10:51:05Z
dc.date.available2021-07-02T10:51:05Z
dc.date.issued2005-05
dc.description.abstractPurpose: To compare diffusion-weighted echo-planar imaging (DW) with spin-echo (SE), and fluid-attenuated inversion recovery (FLAIR) sequences in the evaluation of epidermoid cysts (ECs), and to evaluate T2 shine-through effect. Materials and methods: Fifteen patients were imaged prospectively in two different 1.5 T magnetic resonance (MR) units with standard head coils with SE, FLAIR and DW echo planar imaging sequences. The qualitative and quantitative assessments were performed by two radiologists in consensus. Apparent diffusion coefficient (ADC) values were obtained from all ECs. Exponential DW images are obtained in I I cases to eliminate T2 shine-through effects. The results are analyzed with variance analysis (ANOVA) and Bonferroni t method. Results: FLAIR sequence was superior to T1- and T2-weighted sequences in showing ECs. In U cases, the borders of the lesions could be delineated from the surrounding structures with only DW imaging where ECs were markedly hyperintense. The ADC values of ECs are significantly lower than CSF (P < 0.001), and significantly higher than deep white matter (P < 0.01). On exponential DW images, ECs had similar intensity with brain parenchyma showing that the real cause of the hyperintensity of the lesions on trace images is the enhanced T2 effect of the tissue. Conclusion: FLAIR sequence is superior to the conventional MR sequences in demonstrating the ECs and DW imaging is superior to other MR sequences in delineating the borders of the ECs. Exponential DW images had shown that the hyperintensity in the trace images are caused by increased T2 effect of the lesion rather than the decrease in ADC values. (c) 2004 Elsevier Ireland Ltd. All rights reserved.en_US
dc.identifier.citationHakyemez, B. vd. (2005). "Intracranial epidermoid cysts: diffusion-weighted, FLAIR and conventional MR findings". European Journal of Radiology, 54(2), 214-220.en_US
dc.identifier.endpage220tr_TR
dc.identifier.issn0720-048X
dc.identifier.issue2tr_TR
dc.identifier.pubmed15837401tr_TR
dc.identifier.scopus2-s2.0-17144380003tr_TR
dc.identifier.startpage214tr_TR
dc.identifier.urihttps://doi.org/10.1016/j.ejrad.2004.06.018
dc.identifier.urihttp://hdl.handle.net/11452/20999
dc.identifier.volume54tr_TR
dc.identifier.wos000228961700007tr_TR
dc.indexed.pubmedPubmeden_US
dc.indexed.scopusScopusen_US
dc.indexed.wosSCIEen_US
dc.language.isoenen_US
dc.publisherElsevier Irelanden_US
dc.relation.collaborationYurt içitr_TR
dc.relation.collaborationSanayitr_TR
dc.relation.journalEuropean Journal of Radiologyen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergitr_TR
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectCystsen_US
dc.subjectDiffusion magnetic resonance imagingen_US
dc.subjectMagnetic resonance (MR)en_US
dc.subjectEpidermoiden_US
dc.subjectMagnetic-resonanceen_US
dc.subjectTumorsen_US
dc.subjectBrainen_US
dc.subjectRadiology, nuclear medicine & medical imagingen_US
dc.subject.wosRadiology, nuclear medicine & medical imagingen_US
dc.titleIntracranial epidermoid cysts: diffusion-weighted, FLAIR and conventional MR findingsen_US
dc.typeArticle
dc.wos.quartileQ2en_US

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