Медицинская литература. Новинки

 

 

 

 

 

 

3D-SWAN в оценке особенностей структуры глиобластом и метастазов в головной мозг на 3Тл-МР-томографе

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Импульсная последовательность SWAN (Т2 Star Weighted Angiography) является вариантом 3D-Т2*-GRE с возможностью получения томограмм с высокой чувствительностью к визуализации микрокровоизлияний и венозных структур. В режиме SWAN микрососуды в структуре опухоли имели точечную форму, а микрогеморрагии (более 3 мм) вид глыбок и микроузелков. Новая импульсивная последовательность SWAN в клинической предоперационной диагностике показала большой диагностический потенциал в демонстрации аномальной микровенозной сети и кровоизлияний в различных опухолях мозга. В нашем исследовании кровоизлияния чаще встречались в глиобластомах (92% случаев), чем в метастазах (42% случаев).

Ключевые слова:
магнитно-резонансная томография, магнитная восприимчивость, импульсная последовательность SWAN, микрокровоизлияния.

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3D-SWAN in Evaluation of Structural Features of Glioblastome and Metastatic Brain Tumor. 3 Tesla MRI

Т2 Star Weighted Angiography (SWAN) is a variant of high resolution T2* Gradient Echo pulse sequence with high sensitivity to microvenous structures and microhemorrhages of the tissue. On SWAN images tumoral microvessels had the dotlike form, and microhemorrhages (more than 3mm.) looked like spot and micronodules. New MR-sequence SWAN has shown high differential diagnostic potential in demonstration of an abnormal microvascularity and hemorrhages in various tumors of the brain. In our study hemorrhages were typical features in glioblastome (in 92 % of cases), and rare in metastases (in 42 % of cases).

Keywords:
мagnetic resonance imaging, magnetic permeability, pulse sequence SWAN, microhemorrhages