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Susceptibility weighted imaging (SWI), originally called BOLD venographic imaging, is an MRI sequence that is exquisitely sensitive to venous blood, hemorrhage and iron storage. SWI uses a fully flow compensated, long echo, gradient recalled echo (GRE) pulse sequence to acquire images.
SWI: Spoiled gradient recalled echo (GRE), fully flow compensated, long echo time, combines phase image with magnitude image [75] Detecting small amounts of hemorrhage (diffuse axonal injury pictured) or calcium. [75] Inversion recovery Short tau inversion recovery: STIR: Fat suppression by setting an inversion time where the signal of fat is ...
SWI: Spoiled gradient recalled echo (GRE), fully flow compensated, long echo time, combines phase image with magnitude image [12] Detecting small amounts of hemorrhage (diffuse axonal injury pictured) or calcium. [12] Inversion recovery Short tau inversion recovery: STIR: Fat suppression by setting an inversion time where the signal of fat is ...
The reflected ultrasound is received by the probe, transformed into an electric impulse as voltage, and sent to the engine for signal processing and conversion to an image on the screen. The depth reached by the ultrasound beam is dependent on the frequency of the probe used. The higher the frequency, the lesser the depth reached. [9]
Diffuse axonal injury (DAI) is a brain injury in which scattered lesions occur over a widespread area in white matter tracts as well as grey matter. [1] [2] [3] [4 ...
Subdural hematoma maybe less acute than epidural hematoma due to slower blood accumulation, but it still has the potential to cause brain herniation that may require surgical evacuation. [3] Clinical features depend on the site of injury and severity of injury. Patients may have a history of loss of consciousness but they recover and do not ...
SWI: Spoiled gradient recalled echo (GRE), fully flow compensated, long echo time, combines phase image with magnitude image [9] Detecting small amounts of hemorrhage (diffuse axonal injury pictured) or calcium. [9] Inversion recovery Short tau inversion recovery: STIR: Fat suppression by setting an inversion time where the signal of fat is ...
A pseudosubarachnoid hemorrhage is an apparent increased attenuation on CT scans within the basal cisterns that mimics a true subarachnoid hemorrhage. [1] This occurs in cases of severe cerebral edema , such as by cerebral hypoxia .