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• W2940362223 abstract "It can be inferred from data published in the literature that brain compression occurs in the early stages of acute hydrocephalus and that drainage of extracellular waste products is impaired. The authors hypothesized that compression of the cortical extracellular compartment will alter water distribution and retard the diffusion of fluid in the hydrocephalic brain. Using magnetic resonance imaging proton diffusion, blood perfusion, and T 1 and T 2 relaxation times were determined in adult rat brain prior to, and 1 and 8 days following induction of hydrocephalus by using kaolin injection. Five anatomical regions of interest were studied. The striatum, dorsal cortex, and lateral cortex were shown to exhibit decreased T 2 and apparent diffusion coefficient (ADC) values but no change in perfusion. Examination of white matter demonstrated an initial decrease in ADC followed by a significant increase. The T 2 relaxation times increased and perfusion decreased progressively from 1 to 8 days. Acute experimental hydrocephalus causes compression of gray matter, perhaps associated with reduction in total water, which impairs diffusion of protons in the tissue. White matter compression and hypoperfusion precede the development of edema. These findings have importance for understanding the neurochemical changes that occur in hydrocephalic brains." @default.
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• W2940362223 date "1999-10-01" @default.
• W2940362223 modified "2023-10-14" @default.
• W2940362223 title "Altered diffusion and perfusion in hydrocephalic rat brain: a magnetic resonance imaging analysis" @default.
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• W2940362223 doi "https://doi.org/10.3171/foc.1999.7.4.14" @default.
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