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   <subfield code="a">Perfusion computed tomography assessments of peri-enhancing brain tissue in high-grade gliomas</subfield>
   <subfield code="h">[Elektronische Daten]</subfield>
   <subfield code="c">[A. Stecco, F. Fabbiano, P. Amatuzzo, E. Cignini, M. Brambilla, L. Masini, M. Krengli, A. Carriero]</subfield>
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   <subfield code="a">Valutazione mediante tomografia computerizzata perfusionale del tessuto cerebrale circostante l'area lesionale d'impregnazione nei gliomi ad alto grado</subfield>
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   <subfield code="a">Purpose: This study was undertaken to identify tumoural infiltration of peri-enhancing brain tissue in patients with glioblastoma by means of perfusion computed tomography (PCT) parameters, cerebral blood volume (CBV) and permeability surface (PS). Materials and methods: Eight patients with surgically treated glioblastoma who were eligible for radiotherapy and nine patients with brain metastases from lung and breast cancer underwent CT before and after injection of contrast medium. CBV and PS were calculated in the contrast-enhancing lesion area, in the area of perilesional oedema and in the normal-appearing white matter (NAWM), normalised to contralateral symmetrical areas. Results: No significant differences were found for normalised CBV (nCBV) and nPS in NAWM regions between metastasis and glioma. Significant differences in nPS (p&lt;0.005) were found between the typically vasogenic oedema surrounding the metastases and signal alteration surrounding the glial neoplasm. On the contrary, no significant differences were detected in the same areas for nCBV. Conclusions: PCT can analyse the histopathological substrate underlying the hypodense peritumoural halo and differentiate between vasogenic oedema and neoplastic infiltration on the basis of the PS parameter. In our study, PS was more informative than CBV. These findings can be used to integrate plans for radiation therapy and/or surgery.</subfield>
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   <subfield code="a">Springer-Verlag Italia, 2012</subfield>
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   <subfield code="a">Glioblastoma</subfield>
   <subfield code="2">nationallicence</subfield>
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   <subfield code="a">Perfusion computed tomography</subfield>
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   <subfield code="a">Cerebral blood volume</subfield>
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   <subfield code="a">Permeability surface</subfield>
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   <subfield code="a">Glioblastoma</subfield>
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   <subfield code="a">Tomografia computerizzata perfusionale</subfield>
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   <subfield code="a">Volume ematico cerebrale</subfield>
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   <subfield code="a">Superficie di permeabilità</subfield>
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   <subfield code="a">Stecco</subfield>
   <subfield code="D">A.</subfield>
   <subfield code="u">SCDU Radiologia, AOU Maggiore della Carità, Università del Piemonte Orientale A. Avogadro, C.so Mazzini 18, 28100, Novara, Italy</subfield>
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   <subfield code="a">Fabbiano</subfield>
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   <subfield code="u">SCDU Radiologia, AOU Maggiore della Carità, Università del Piemonte Orientale A. Avogadro, C.so Mazzini 18, 28100, Novara, Italy</subfield>
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   <subfield code="a">Amatuzzo</subfield>
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   <subfield code="t">La radiologia medica</subfield>
   <subfield code="d">Springer Milan</subfield>
   <subfield code="g">118/3(2013-04-01), 431-443</subfield>
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