Empty delta sign – of dural venous sinus thrombosis within…

Empty delta sign – of dural venous sinus thrombosis within the superior sagittal sinus on contrast enhanced CT. The thrombus creates a filling defect within the sinus outlined by an enhancing triangular rim. Of course calling it the ‘empty triangle sign’ would be too simple and so quite rightly the Greek letter delta (Δ) is used to add an air of mystique. 

from our tumblr blog

http://radiologysigns.tumblr.com/

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