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31 sty 2018 · On a normal CT head scan, the grey and white matter should be clearly differentiated. Loss of this differentiation suggests the presence of oedema which may develop secondary to a hypoxic brain injury, infarction (e.g. ischaemic stroke), tumour or cerebral abscess.
The brain consists of grey and white matter structures which are differentiated on CT by differences in density. White matter has a high content of myelinated axons. Grey matter contains relatively few axons and a higher number of cell bodies.
13 maj 2023 · The cortical grey matter should be readily differentiated from the white matter. The deep grey matter should be distinct from the white matter also. Pay particular attention to the insular cortex and basal ganglia as they are lost early in middle cerebral artery infarction .
Grey-white differentiation refers to the appearance of the interface between cerebral and cerebellar white matter and grey matter on brain CT and MRI. The term is most often used when trying to differentiate cytotoxic from vasogenic edema.
31 lip 2024 · CT head, also known as CT brain, refers to a computed tomography (CT) examination of the brain and surrounding cranial structures. It is most commonly performed as a non-contrast study, but the addition of a contrast-enhanced phase is performed for some indications.
14 gru 2023 · To read a CT scan, start by noting the shades of white, gray, and black. The white area signals dense tissues like bone, the gray area represents soft tissues and fluids, and the dark gray and black area shows air and fat.
Grey-white differentiation - the earliest sign of a CVA on CT scan is the loss of the grey-white interface on CT scan. Compare side to side. Shift - the falx should be in the midline with ventricles the same on both sides. Check for effacement of sulci (unilateral or bilateral).
