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Öz

Objective: Susceptibility weighted imaging (SWI) is a novel magnetic resonance technique which uses tissue magnetic susceptibility differences to generate a unique contrast, different from that of spin density, T1, T2, and T2*. The subject of this study is to display the usability and the lesion detection sensitivity of the susceptibility weighted imaging sequence at the various clinic condition in neuroradiology.Methods: Between February 2009 - May 2009 in Taksim Education and Research Hospital 180 patients, 93 (51.7%) females and 87 (48.3%) males and mean age is 51,6 , are included to this study. T2* and SWI sequences were applied to all patients additional to conventional magnetic resonance imaging (MRI) sequences by using 1,5 Tesla MRI device (Magnetom Avanto; Siemens, Erlangen, Germany). Patients were compared with conventional and T2 * sequences in terms of visibility and appearance characteristics of lesions.Results: In our study, we found out that, 12 patients have traumatic and 10 patients have non-traumatic bleeding, 17 patients have mass, 14 patients have micro bleeding spots, 18 patients have vascular malformations, 19 patients have ischemic cerebral infarct, 5 patients have cerebral mineral depositions which is related to systemic or neurodegenerative disorders, 8 patients have multiple sclerosis and 48 patients have nonspecific findings. In 30 patients no pathologic findings have been found.Conclusion: SWI sequence is a new MRI imaging sequence which is sensitive in detection of pathologies like macro-micro bleeding, mineral depositions, low-flow vascular lesions, internal architecture of the cranial masses, and also showing hemorrhagic transformations in cerebral infarcts without anatomical detail loss

Anahtar Kelimeler

• Susceptibility weighted imaging, neuroradiology, magnetic resonance imaging

Nöroradyolojide “Susceptibility Weighted Imaging sekansı” uygulamaları

Öz

Amaç: Klinik uygulamaya yakın zamanda giren Susceptibility Weighted Imaging (SWI) sekansı dokuların manyetik yatkınlık farklarını kullanarak kontrast oluşturan, T1, T2, T2* ve proton dansitesinden farklı yeni bir sekanstır. Çalışmamızda, nöroradyolojide susceptibility weighted imaging sekansının kullanılabilirliği ve lezyon saptamadaki duyarlılığının ortaya konması amaçlandı.

Yöntemler: Şubat 2009- Mayıs 2009 tarihleri arasında S.B. Taksim Eğitim ve Araştırma Hastanesinde klinisyen tarafından magnetik rezonans (MR) istemi yapılmış ortalama 51,6 yaşında (Aralık: 5-86) ,93’ü (%51,7) kadın ve 87’si (%48,3) erkek 180 hasta çalışmaya dahil edildi. Tüm hastalara 1,5-T MR cihazı (Magnetom Avanto; Siemens, Erlangen, Almanya) kullanılarak konvansiyonel sekanslara ek olarak aksiyal T2* ve SWI sekansları ile görüntüler alındı. Hastalar lezyon görülebilirliği ve görünüm özellikleri açısından konvansiyonel ve T2* sekans ile karşılaştırıldı.

Bulgular: Çalışmamızda 12 hastada travmatik, 10 hastada notravmatik kanama, 17 hastada kitle, 14 hastada mikrokanama odakları, 18 hastada vasküler malformasyon, 19 hastada iskemik serebral enfarkt, 5 hastada sistemik veya nörodejeneratif hastalığa bağlı serebral minereal birikimi, 8 hastada multiple skleroz ve 48 hastada nonpesifik bulgular saptanmıştır. Toplam 30 hastada ise herhangi bir patolojik bulgu saptanmamıştır.

Sonuç: SWI sekansı, anatomik detay kaybı olmaksızın yavaş akımlı vasküler lezyonlar, mikro-makro kanamalar, mineral birikimini saptamada, kranial kitlelerin iç yapısını anlamada ve serebral enfarktlarda hemorajik transformasyonu saptamada duyarlı yeni bir MR sekansıdır.

Anahtar kelimeler: Susceptibility weighted imaging, nöroradyoloji, manyetik rezonans görüntüleme

Anahtar Kelimeler

• Susceptibility weighted imaging, nöroradyoloji, manyetik rezonans görüntüleme

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