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• W2945152182 abstract "Objectives To define normal signal intensity values of amide proton transfer-weighted (APTw) magnetic resonance (MR) imaging in different brain regions. Materials and Methods Twenty healthy subjects (9 females, mean age 29 years, range 19 – 37 years) underwent MR imaging at 3 Tesla. 3D APTw (RF saturation B1,rms = 2 T, duration 2 s, 100% duty cycle) and 2D T2-weighted turbo spin echo images were acquired. Postprocessing (image fusion, ROI measurements of APTw intensity values in 22 different brain regions) was performed and controlled by two independent neuroradiologists. Values were measured separately for each brain hemisphere. A subject was scanned both in prone and supine position to investigate differences between hemispheres. A mixed model on a 5% significance level was used to assess the effect of gender, brain region and side on APTw intensity values. Results Mean APTw intensity values in the hippocampus and amygdala varied between 1.13 - 1.57%, in the deep subcortical nuclei (putamen, globus pallidus, head of caudate nucleus, thalamus, red nucleus, substantia nigra) between 0.73 - 1.84%, in the frontal, occipital and parietal cortex between 0.56 - 1.03%; in the insular cortex between 1.11 - 1.15%, in the temporal cortex between 1.22 - 1.37%, in the frontal, occipital and parietal white matter between 0.32 - 0.54% and in the temporal white matter between 0.83 - 0.89%. APTw intensity values were significantly impacted both by brain region (p<0.001) and by side (p<0.001), whereby overall values on the left side were higher than on the right side (1.13 vs 0.9%). Gender did not significantly impact APTw intensity values (p=0.24). APTw intensity values between the left and the right side were reversed after changing the position of one subject from supine to prone. Conclusions We determined normal baseline APTw intensity values in different anatomical localisations in healthy subjects. APTw intensity values differed both between anatomical regions and between left and right brain hemisphere." @default.
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• W2945152182 date "2019-05-22" @default.
• W2945152182 modified "2023-10-17" @default.
• W2945152182 title "Amide Proton Transfer Contrast Distribution in Different Brain Regions in Young Healthy Subjects" @default.
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• W2945152182 doi "https://doi.org/10.3389/fnins.2019.00520" @default.
• W2945152182 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6538817" @default.
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