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  5. Άρθρα σε επιστημονικά περιοδικά ( Ανοικτά) - ΙΑΤ
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Please use this identifier to cite or link to this item: https://olympias.lib.uoi.gr/jspui/handle/123456789/18174
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dc.contributor.authorTzika, A. A.en
dc.contributor.authorAstrakas, L. G.en
dc.contributor.authorZarifi, M. K.en
dc.contributor.authorZurakowski, D.en
dc.contributor.authorPoussaint, T. Y.en
dc.contributor.authorGoumnerova, L.en
dc.contributor.authorTarbell, N. J.en
dc.contributor.authorBlack, P. M.en
dc.date.accessioned2015-11-24T18:50:54Z-
dc.date.available2015-11-24T18:50:54Z-
dc.identifier.issn0008-543X-
dc.identifier.urihttps://olympias.lib.uoi.gr/jspui/handle/123456789/18174-
dc.rightsDefault Licence-
dc.subjectAdolescenten
dc.subjectAspartic Acid/*analogs & derivatives/analysisen
dc.subjectBrain Chemistryen
dc.subjectBrain Neoplasms/blood supply/*diagnosisen
dc.subjectChilden
dc.subjectChild, Preschoolen
dc.subjectCholine/analysisen
dc.subjectDisease Progressionen
dc.subjectFemaleen
dc.subjectHumansen
dc.subjectInfanten
dc.subject*Magnetic Resonance Angiographyen
dc.subject*Magnetic Resonance Spectroscopyen
dc.subjectMaleen
dc.subjectPrognosisen
dc.titleSpectroscopic and perfusion magnetic resonance imaging predictors of progression in pediatric brain tumorsen
heal.typejournalArticle-
heal.type.enJournal articleen
heal.type.elΆρθρο Περιοδικούel
heal.identifier.primary10.1002/cncr.20096-
heal.identifier.secondaryhttp://www.ncbi.nlm.nih.gov/pubmed/15022293-
heal.identifier.secondaryhttp://onlinelibrary.wiley.com/store/10.1002/cncr.20096/asset/20096_ftp.pdf?v=1&t=h0krwptv&s=0a5422aff5bac01b8fc6bcad8f465344e59f3704-
heal.languageen-
heal.accesscampus-
heal.recordProviderΠανεπιστήμιο Ιωαννίνων. Σχολή Επιστημών Υγείας. Τμήμα Ιατρικήςel
heal.publicationDate2004-
heal.abstractBACKGROUND: In vivo biomarkers to predict progression of brain tumors are of great value in clinical practice. Therefore, the authors tested the hypothesis that changes in choline ratios by magnetic resonance (MR) spectroscopic imaging and/or relative tumor blood volume (rTBV) can differentiate clinically stable from progressive pediatric brain tumors. METHODS: MR spectroscopic imaging examinations were performed on 27 children with neuroglial brain tumors during therapy on a 1.5-Tesla MR system. Normalized rTBV values were measured in 11 of 27 patients. Each examination was rated as stable or progressive by clinical and imaging criteria. RESULTS: The percent change in normalized choline (Cho) was significantly greater in patients who had progressive examinations compared with patients who had stable examinations (P = 0.03). The percent change in Cho/N-acetylaspartate (Cho/NAA) was significantly higher in patients who had progressive outcomes (n = 18 patients) compared with patients who had stable outcomes (n = 32 patients; P < 0.001; sensitivity, 0.89; specificity, 0.88) and was identified as the most important prognostic indicator of tumor progression by logistic regression (likelihood ratio test, 33.4; P < 0.001). The odds of tumor progression were approximately 55 times greater for patients who showed at least a 20% change in Cho/NAA. rTBV distinguished between progressing and stable tumors (P = 0.03), and Cho/NAA and rTBV values showed interaction to predict the probability of a progressing clinical outcome. CONCLUSIONS: The percent change in Cho/NAA by proton MR spectroscopic imaging, assisted by rTBV, was useful in predicting tumor progression in children with brain tumors.en
heal.journalNameCanceren
heal.journalTypepeer-reviewed-
heal.fullTextAvailabilityTRUE-
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