NÖRORADYOLOJİ PRATİĞİNDE SUSCEPTIBILITY WEIGHTED IMAGING (SWI) MRG SEKANS KULLANIM ALANLARI

Öz

Amaç: Susceptibility Weighted Imaging (SWI) sekansı deoksihemoglobin, intrasellüler hemoglobin ve hemosiderin gibi kan ürünleri ile demir ve kalsiyum gibi minerallerin manyetik duyarlılıklarını kullanarak yüksek çözünürlüklü, üç boyutlu, magnifiye ve faz imajlardan ve bunların kombinasyonundan oluşan gradient ağırlıklı yeni bir MR sekansıdır. SWI sekansının nöroradyoloji pratiğinde kullanılabilirliği ve lezyon saptamadaki duyarlılığının ortaya konması amaçlandı.

Materyal ve Metod: Nisan 2010-Mayıs 2011 tarihleri arasında 1-87 yaşları arasında 70 hasta (40 erkek, 30 kadın) incelemeye dâhil edildi. Tüm olgulara 1,5 T MR cihazı ile rutin konvansiyonel MRG incelemesine SWI sekansı dahil edildi. SWI sekansının lezyon tesbit etmedeki duyarlılığı hesaplandı.

Bulgular: Çalışmamızda 18 hastada iskemik serebral enfarkt, 7 hastada nontravmatik, 7 hastada travmatik kanama, 10 hastada vasküler malformasyon, 21 hastada intrakranial kitle, 7 hastada nörodejeneratif hastalığa bağlı serebral minereal birikimi. SWI sekansı konvansiyonel sekanslarla karşılaştırıldığında mikro-makro kanamaların, venöz malformasyonların ve mineral birikiminin belirginliğini ve görünürlüğünü artırmaktadır.

Sonuç: SWI sekansı, mikro ve makro kanama, lezyon içine kanamaları göstermede, kranial kitlelerin sınırlarının daha doğru tespitinde, serebral enfarktlar da hemorajik evreyi sapatamada, hücre içi mineral birikimi gibi birçok patolojinin saptanmasında, duyarlı yeni bir MR görüntüleme sekansıdır.

Anahtar Kelimeler

• Manyetik Rezonans Görüntüleme; Serebral; Lezyon

Kaynakça

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