Estimate age of stroke - CT: Difference between revisions
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== CT Stroke Aging(From Diagnostic Neuroradiology by Osborn) == | |||
=== Hyperacute (<12h) === | === Hyperacute (<12h) === | ||
Latest revision as of 19:25, 31 October 2018
CT Stroke Aging(From Diagnostic Neuroradiology by Osborn)
Hyperacute (<12h)
- Normal (50-60%)
- Hyperdense artery (25-50%)
- Obscuration of lentiform nuclei
Acute (12-24h)
- Low density basal ganglia
- Loss of gray-white interfaces (insular ribbon sign, obscuration of cortex-medullary white matter border)
- Sulcal effacement
1-3days
- Increasing mass effect
- Wedge-shaped low density area that involves both gray and white matter
- Hemorrhagic transformation may occur (most often basal ganglia and cortex)
4-7 days
- Gyral enhancement
- Mass effect, edema persist
1-8 weeks
- Contrast enhancement perists
- Mass effect resolves
- Transient calcification can occur (pediatric strokes)
Months-years
- Encephalomalacic change, volume loss
- Calcification rare