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- W2018694528 abstract "Changes in T2*-weighted tissue sodium (23Na) signal following acute ischemia may help to identify necrotic tissue and estimate the duration of ischemia. Sodium signal was monitored in a rabbit model of acute (0-4 h) focal cerebral ischemia, using gradient echo 23Na MR images (echo time = 3.2 ms) acquired continuously in 20-min intervals on a 4-Tesla MRI. 2,3,5-Triphenyl-tetrazolium chloride staining was used to identify regions of necrosis. In necrotic tissue, average 23Na image signal intensity decreased by 11% +/- 8% during the first 40 min of ischemia followed by a linear increase (0.19%/min) to 25% +/- 14% greater than baseline after 4 h of ischemia. The time course of 23Na signal change observed in necrotic tissue following focal ischemia in this rabbit model is consistent with an initial decrease in 23Na T2* relaxation time followed by an increase in tissue sodium concentration and provides further evidence that tissue 23Na signal may offer unique information regarding tissue viability that is complementary to other MR imaging techniques." @default.
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- W2018694528 date "2004-09-01" @default.
- W2018694528 modified "2023-09-25" @default.
- W2018694528 title "Sodium T2*-weighted MR imaging of acute focal cerebral ischemia in rabbits" @default.
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- W2018694528 doi "https://doi.org/10.1016/j.mri.2004.02.004" @default.
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