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Showing 1 to 2 of 2 for “"atlas-based segmentation"”.
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Quantitative susceptibility mapping and susceptibility-based distortion correction of echo planar images
… synthetic fieldmap is computed from a tissue/air segmentation of a structural image using a perturbation method and subsequently used to unwarp the EPI data. Shim and other missing parameters are estimated by registration. We obtain results that are similar to those obtained using fieldmnaps, …
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Quantifying Neuromelanin Content Across Varying Magnetic Field Strengths: A Comparative Analysis
… both manually and with the help of a standard atlas. NM in the substantia nigra was quantified in the form of Contrast to Noise Ratio (CNR). Spearman’s rank order correlations assessed statistical dependence between the ranking of participant CNR values at 3T and 7T. We found that CNR values at …