Nesrin GÜNDÜZ, Başak ATALAY, Umut Perçem Orhan SÖYLEMEZ

Vestibüler schwanomlarda Koos sınıflaması ile ADC-post kontrast sinyal intensite değerlerinin ilişkisi – Bir kesitsel çalışma

Amaç: Bu çalışmada Koos sınıflamasının gözlemciler arası güvenilirliğini ve Görünür Difüzyon Katsayısı (ADC) ve kontrast sonrası sinyal intensite değerleri ile korelasyonunu değerlendirmeyi amaçladık. Yöntemler: Hastane veri tabanından 4 yıllık süre içerisinde radyolojik raporlamada vestibuler şıvannom tanısı yer almış olan MR görüntüleri retrospektif olarak tarandı. Lezyonların Koos sınıflamasına göre derecesi, klinik ve patolojik verilere kör olan iki bağımsız radyolog tarafından değerlendirildi. Koos sınıflamasının gözlemciler arası uyumunu analiz etmek için Cohen's Kappa; ADC, sinyal intensite ölçümleri ve Koos tümör derecesi arasındaki korelasyonu değerlendirmede Kendall's tau b korelasyon katsayısı kullanıldı. Bulgular: 34 vestibüler şıvannom, 33 hasta (21 kadın, ortalama yaş 52.6±16.6 yıl) çalışmaya dahil edildi. Güvenilirlik analizleri, ADC (ICC: 0,93, %95 GA: 0.87-0.97, p

The relationship between Koos classification and ADC-post-contrast signal intensity values of vestibular schwannoma - A cross sectional study

Aim: We aimed to determine the inter-observer reliability of the Koos classification and to evaluate its correlation with Apparent Diffusion Coefficiency (ADC) and post contrast signal intensity values. Methods: Vestibular schwannomas were retrospectively scanned from picture archiving and communication system over a 4-year period. Koos grade of tumor was assessed by two radiologists blinded to the clinical and pathological data. Cohen’s Kappa was used to analyse inter-observer agreement of Koos grade. The correlation between ADC, signal intensity measurements and Koos grade of tumors was analysed with Kendall’s tau b correlation coefficient. Results: Thirty three patients (21 females, mean age 52.6±16.6 years) with 34 vestibular schwannomas were included the study. The reliability analyses revealed excellent inter-observer agreement for ADC (ICC: 0.93, 95% CI: 0.87-0.97, p

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