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- W2155777414 abstract "In patients with hyperacute ischemic stroke, early demonstration of infarction is essential. Diffusion weighted imaging (DWI) is the key method for detecting hyperacute infarction. The value of high b-value DWI in hyperacute ischemic stroke is controversial at 1.5 T, and is unknown at 3 T. The aim of this study is to explore the value of high b-value versus standard b-value DWI at 3T in hyperacute stroke with quantitative and qualitative analysis.This study prospectively included 104 consecutive patients with hyperacute stroke. At 3 T, conventional MR sequences and DWI were performed. The examination included a standard DWI (b = 1000 s/mm(2)) and two high b-value DWI (b = 3000 s/mm(2) and b = 5000 s/mm(2)). Qualitative and quantitative analysis was performed.With increasing b value, DW images appeared noisier. The number of detected lesions was significantly higher on b = 3000 images than on the other DW images and higher on b = 5000 images than on b = 1000 images. The number of lesions greater than 1 cm was not significantly different. Lesion conspicuity was higher, boundary better seen, lesion extent bigger, and estimation of final infarct size was better on high b-value than on standard b-value DWI. Contrast-to-noise-ratio (CNR) and signal-to-noise-ratio (SNR) decreased and contrast ratio (CR) increased on high b-value DWI compared to standard b-value DWI.At 3 T, high b-value DWI was superior to standard b-value DWI in detection of hyperacute infarction and prediction of final infarct size in spite of increasing imaging artifacts." @default.
- W2155777414 created "2016-06-24" @default.
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- W2155777414 date "2013-07-01" @default.
- W2155777414 modified "2023-09-27" @default.
- W2155777414 title "3-T high-b-value diffusion-weighted MR imaging in hyperacute ischemic stroke" @default.
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- W2155777414 doi "https://doi.org/10.1016/j.neurad.2012.08.007" @default.
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