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CT venogram (sagittal reconstruction – 4 mm maximum intensity projection). Contrast in the sagittal sinus should extend inferiorly to meet the straight sinus at the torcula/confluence of the sinuses. In this image, the thrombus fills the lower part of the sagittal sinus, making it similar in density to the brain (black arrow). Note that the sinuses are irregular and variable, and a similar appearance would be seen if part of the sinus were out of the plane of the image
