Browsing by Author "Thamburaj, Krishnamoorthy"

Now showing 1 - 4 of 4
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    Cerebral air embolism during contrast-enhanced CT
    (PEDIATRIC RADIOLOGY, 2006)
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    Clinical applications of susceptibility weighted MR imaging of the brain - a pictorial review
    (NEURORADIOLOGY, 2008)
    Introduction Susceptibility-weighted imaging (SWI) is a novel magnetic resonance (MR) technique that exploits the magnetic susceptibility differences of various tissues, such as blood, iron and calcification. This pictorial review covers many clinical conditions illustrating its usefulness.Methods SWI consists of using both magnitude and phase images from a high-resolution, three-dimensional fully velocity-compensated gradient echo sequence. Phase mask is created from the MR phase images, and multiplying these with the magnitude images increase the conspicuity of the smaller veins and other sources of susceptibility effects, which is depicted using minimal intensity projection (minIP).Results The phase images are useful in differentiating between diamagnetic and paramagnetic susceptibility effects of calcium and blood, respectively. This unique MR sequence will help in detecting occult low flow vascular lesions, calcification and cerebral microbleed in various pathologic conditions and aids in characterizing tumors and degenerative diseases of the brain. This sequence also can be used to visualize normal brain structures with conspicuity.Conclusion Susceptibility-weighted imaging is useful in differentiating and characterizing diverse brain pathologies.
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    Moyamoya disease with cerebral arteriovenous malformation presenting as primary subarachnoid hemorrhage
    (JOURNAL OF NEUROIMAGING, 2007)
    The authors report a rare combination of definite moyamoya disease and brain arteriovenous malformation (AVM) presenting with primary subarachnoid hemorrhage (SAH) unheard of in the literature. The authors review the radiographic findings of this unique case with a brief review of literature.
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