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Article: Susceptibility-weighted imaging in patients with pyogenic brain abscesses at 1.5T: Characteristics of the abscess capsule

TitleSusceptibility-weighted imaging in patients with pyogenic brain abscesses at 1.5T: Characteristics of the abscess capsule
Authors
Issue Date2012
Citation
American Journal of Neuroradiology, 2012, v. 33, n. 5, p. 910-914 How to Cite?
AbstractBACKGROUND AND PURPOSE: SWI is a high-resolution 3D, fully velocity-compensated gradient-echo sequence that uses both magnitude and phase data. The purpose of this study was to investigate the phase behavior of the capsule of pyogenic brain abscesses with noncontrast SWI. MATERIALS AND METHODS: Fourteen patients with pyogenic brain abscesses were studied at 1.5T. In all of the patients, SWI images were obtained and reviewed in addition to conventional MR images. Phase values within the abscess capsule were measured and compared with those from the abscess cavities and contralateral normal white matter using 1-way repeated measures ANOVA with post hoc Bonferroni analysis. RESULTS: SWI phase images showed mild hypointesity in 6 patients, isointensity in 3 patients, and mixed iso- to mild hypointensity in 5 patients. The means of phase in the cavity, rim of abscesses, and contralateral normal white matter were -7.552 x 10-3 ± 0.024, -0.105 ± 0.080, and +0.029 ± 0.011 radians, respectively. Post hoc comparisons showed significant differences between any pair of the 3 regions (abscess cavity, rim capsule, and normal white matter) in SWI (all Ps < .005). CONCLUSIONS: SWI phase imaging shows evidence of paramagnetic substances in agreement with the presence of free radicals from phagocytosis. SWI may provide additional information valuable in the characterization of pyogenic brain abscesses.
Persistent Identifierhttp://hdl.handle.net/10722/210087
ISSN
2015 Impact Factor: 3.124
2015 SCImago Journal Rankings: 1.602

 

DC FieldValueLanguage
dc.contributor.authorLai, Ping Hong-
dc.contributor.authorChang, H. C.-
dc.contributor.authorChuang, T. C.-
dc.contributor.authorChung, H. W.-
dc.contributor.authorLi, J. Y.-
dc.contributor.authorWeng, M. J.-
dc.contributor.authorFu, J. H.-
dc.contributor.authorWang, P. C.-
dc.contributor.authorLi, S. C.-
dc.contributor.authorPan, H. B.-
dc.date.accessioned2015-05-22T06:06:33Z-
dc.date.available2015-05-22T06:06:33Z-
dc.date.issued2012-
dc.identifier.citationAmerican Journal of Neuroradiology, 2012, v. 33, n. 5, p. 910-914-
dc.identifier.issn0195-6108-
dc.identifier.urihttp://hdl.handle.net/10722/210087-
dc.description.abstractBACKGROUND AND PURPOSE: SWI is a high-resolution 3D, fully velocity-compensated gradient-echo sequence that uses both magnitude and phase data. The purpose of this study was to investigate the phase behavior of the capsule of pyogenic brain abscesses with noncontrast SWI. MATERIALS AND METHODS: Fourteen patients with pyogenic brain abscesses were studied at 1.5T. In all of the patients, SWI images were obtained and reviewed in addition to conventional MR images. Phase values within the abscess capsule were measured and compared with those from the abscess cavities and contralateral normal white matter using 1-way repeated measures ANOVA with post hoc Bonferroni analysis. RESULTS: SWI phase images showed mild hypointesity in 6 patients, isointensity in 3 patients, and mixed iso- to mild hypointensity in 5 patients. The means of phase in the cavity, rim of abscesses, and contralateral normal white matter were -7.552 x 10-3 ± 0.024, -0.105 ± 0.080, and +0.029 ± 0.011 radians, respectively. Post hoc comparisons showed significant differences between any pair of the 3 regions (abscess cavity, rim capsule, and normal white matter) in SWI (all Ps < .005). CONCLUSIONS: SWI phase imaging shows evidence of paramagnetic substances in agreement with the presence of free radicals from phagocytosis. SWI may provide additional information valuable in the characterization of pyogenic brain abscesses.-
dc.languageeng-
dc.relation.ispartofAmerican Journal of Neuroradiology-
dc.titleSusceptibility-weighted imaging in patients with pyogenic brain abscesses at 1.5T: Characteristics of the abscess capsule-
dc.typeArticle-
dc.description.natureLink_to_subscribed_fulltext-
dc.identifier.doi10.3174/ajnr.A2866-
dc.identifier.pmid22282449-
dc.identifier.scopuseid_2-s2.0-84861115521-
dc.identifier.volume33-
dc.identifier.issue5-
dc.identifier.spage910-
dc.identifier.epage914-
dc.identifier.eissn1936-959X-

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