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• W4200116910 abstract "Preoperative radiological assessment of meningioma characteristics is of value for pre- and post-operative patient management, counselling, and surgical approach.To investigate whether tensor-valued diffusion MRI can add to the preoperative prediction of meningioma consistency, grade and type.30 patients with intracranial meningiomas (22 WHO grade I, 8 WHO grade II) underwent MRI prior to surgery. Diffusion MRI was performed with linear and spherical b-tensors with b-values up to 2000 s/mm2. The data were used to estimate mean diffusivity (MD), fractional anisotropy (FA), mean kurtosis (MK) and its components-the anisotropic and isotropic kurtoses (MKA and MKI). Meningioma consistency was estimated for 16 patients during resection based on ultrasonic aspiration intensity, ease of resection with instrumentation or suction. Grade and type were determined by histopathological analysis. The relation between consistency, grade and type and dMRI parameters was analyzed inside the tumor (whole-tumor) and within brain tissue in the immediate periphery outside the tumor (rim) by histogram analysis.Lower 10th percentiles of MK and MKA in the whole-tumor were associated with firm consistency compared with pooled soft and variable consistency (n = 7 vs 9; U test, p = 0.02 for MKA 10 and p = 0.04 for MK10) and lower 10th percentile of MD with variable against soft and firm (n = 5 vs 11; U test, p = 0.02). Higher standard deviation of MKI in the rim was associated with lower grade (n = 22 vs 8; U test, p = 0.04) and in the MKI maps we observed elevated rim-like structure that could be associated with grade. Higher median MKA and lower median MKI distinguished psammomatous type from other pooled meningioma types (n = 5 vs 25; U test; p = 0.03 for MKA 50 and p = 0.03 and p = 0.04 for MKI 50).Parameters from tensor-valued dMRI can facilitate prediction of consistency, grade and type." @default.
• W4200116910 created "2021-12-31" @default.
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• W4200116910 date "2022-01-01" @default.
• W4200116910 modified "2023-09-26" @default.
• W4200116910 title "Histogram analysis of tensor-valued diffusion MRI in meningiomas: Relation to consistency, histological grade and type" @default.
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• W4200116910 doi "https://doi.org/10.1016/j.nicl.2021.102912" @default.
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