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  • findings
  • The most frequent findings in affected arteries have been loss of medial layer components, collagen fiber degeneration, fibrosis, atherosclerotic changes and parietal thrombosis 7,8,10,11 . (scielo.br)
  • hemorrhage
  • As a result of this shift, it is believed that perforating branches from the basilar artery and/or draining veins are damaged with resultant parenchymal hemorrhage. (radiopaedia.org)
  • Although most extradural hematomas in the posterior fossa are due to temporal bone fractures involving the middle meningeal artery, in the setting of occipital trauma, particularly fractures of the occipital bone, venous hemorrhage is more common 2 . (radiopaedia.org)
  • brain stem
  • however, in the brain stem area and for basilar artery territory, it has some limitations because of bony artifacts in the skull base and most of the time further modalities are needed to document brain stem ischemia. (imagejournals.org)
  • demonstrates
  • CT is usually the modality first obtained and demonstrates a hyperdense collection of blood, located superficially within the lobes of the brain (i.e., not in the basal ganglia ). (radiopaedia.org)
  • sinus
  • Redemonstration of the sinus affection with the hyperdense material inside the sinuses exhibits iso to low intense signal on T1 and low signal on T2 WI. (radiopaedia.org)