Dinçer Aydın AKYILMAZ, Cem ÇALLI, Erkin ÖZGİRAY, YEŞİM ERTAN, Serra KAMER, Ömer KİTİŞ

Diffusion tensor imaging in brain tumors: The role of fractional anisotropy values

Aim: To evaluate the role of Fractional anisotropy (FA) values obtained from diffusion tensor magnetic resonance imaging (DTI) in the differentiation and grading of brain tumors. Materials and Methods: This study examined the conventional and diffusion tensor MR imaging findings of twenty-seven patients diagnosed with brain tumors between 2008 and 2010. Patients were divided into four groups based on tumor types; meningiomas, low-grade gliomas, high-grade gliomas, and metastases. Fractional anisotropy (FA) values were then obtained from the solid components and (if present) peritumoral vasogenic edema of the tumors for each patient by using the region of interest (ROI) method. Finally, the patient groups were analyzed in terms of any statistically significant differences. Results: The FA values obtained from the solid portions and peritumoral edema of meningiomas were found to be higher than those of all other groups (p

Beyin tümörlerinde difüzyon tensör görüntüleme: Fraksiyonel anizotropi değerlerinin rolü

Amaç: Beyin tümörlerinin evrelenmesi ve ayrımında difüzyon tensör manyetik rezonans görüntüleme ile elde edilen fraksiyonel anizotropi değerlerinin katkısını araştırmak. Gereç ve Yöntem: 2008 ve 2010 yılları arasında beyin tümörü tanısı almış ve bölümümüzde konvansiyonel MRG ve difüzyon tensör görüntüleme yapılmış 27 olgu retrospektif olarak tarandı. Olgular menenjiom, düşük dereceli ve yüksek dereceli gliomlar ile metastazlar olmak üzere 4 gruba ayrıldı. Her olguda tümörün solid komponentinden ve peritümöral ödem barındıranlarda vazojenik ödem sahasından ROI (region of interest) yöntemi kullanılarak FA değerleri ölçüldü. Gruplar arasında anlamlı farklılık olup olmadığı istatistiksel yöntemlerle analiz edildi. Bulgular: Tüm tümör grupları karşılaştırıldığında; menenjiomların solid komponentinin ve peritümöral ödeminin FA değeri diğer gruplara oranla istatistiksel anlamlı olarak yüksek bulundu (p

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