File:Basal ganglia bleed (Radiopaedia 2764-6436 Sagittal T1 1).jpg

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Summary:

Description
  • Radiopaedia case ID: 2764
  • Image ID: 3925
  • Plane projection: Sagittal
  • Aux modality: T1
  • Study description: MRI a few days later
  • Study findings: MRI obtained a few days later variable signal consistent with the subacute timing. The majority of the bleed demonstrates high T1 and T2 signal consistent with extracellular met-Hb, with a peripheral rim of low signal (best seen on gradient echo) representing hemosiderin. Time of flight MRA demonstrates the bleed as a globular region of high signal which should not be misinterpreted as flow.* * As time of flight (TOF) MRA is a T1 weighted sequence relying on pre-saturation of non-moving tissue, very intense T1 signal material will still be visible (as seen here with the clot). This also makes TOF a poor choice for MRV as clot will appear bright and may be mistaken for flow.
  • Modality: MRI
  • System: Central Nervous System
  • Findings: Axial non contrast CT image demonstrates a hyperdense focus centered on the globus pallidus on the left with a faint rim of low attenuation. Findings are characteristic of a basal ganglia hemorrhage.
Date Published: 22nd May 2008
Source https://radiopaedia.org/cases/basal-ganglia-bleed
Author Frank Gaillard
Permission
(Permission-reusing-text)		 http://creativecommons.org/licenses/by-nc-sa/3.0/

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Attribution-NonCommercial-ShareAlike 3.0 Unported (CC BY-NC-SA 3.0)

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