D-BRAIN sensitivity to magnetic fields.

<p>D-BRAIN sensitivity to magnetic fields.</p

Phantom WM bundles tractography.

<p>The upper portion of the corticospinal tract (a) has a lower FA in the region highlighted because of the contribution of other fibers coming from the body of the corpus callosum. In (b), the crossing of the corticospinal tracts (blue) and the lateral projections of the corpus callosum (red) are clearly visible.</p

Connectivity analysis.

<p>The 82 GM parcels used as network nodes (a) superimposed to the FA map. In (b), the corresponding connectivity matrix built counting the number of streamlines connecting each couple of parcels (intensities displayed in logarithmic scale).</p

Estimated network connectivity measures.

<p>Variability across different SNR and resolutions of D-BRAIN data. Ground truth: from noiseless data whose voxel size is 1.4 × 1.4 × 1.4 mm³. High Resolution: from noisy data whose voxel size is 1.4 × 1.4 × 1.4 mm³. Low Resolution: from noisy data whose voxel size is 2.1 × 2.1 × 2.1 mm³.</p

Brain like phantom creation.

<p>Proposed pipeline: from realistic inputs and a simulated DW MRI scanner to brain-like D-BRAIN data. The tissue volume fractions have a resolution of 0.7 × 0.7 × 0.7 mm³, streamlines step-size is 0.7 mm.</p

Estimated phantom fODF for different b-values.

<p>Yellow boxes highlight the effect of the b-value. Top left: ROI. ROI magnification for: b-value = 1000 s mm² (a), b-value = 2500 s mm² (b), b-value = 10000 s mm² (c). SNR = inf.</p

D-BRAIN FA maps before and after k-space downsampling.

<p>Voxel size is 0.7 × 0.7 × 0.7 mm³ (a), 1.4 × 1.4 × 1.4 mm³ (b) and 2.1 × 2.1 × 2.1 mm³ (c). Yellow arrows highlight the Gibbs ringing artifact.</p

D-BRAIN.

<p>Anatomical MR image (a) and corresponding diffusion-weighted images for D-BRAIN data. B-values of 1000 s mm⁻² (b), 2500 s mm⁻² (c) and 10000 s mm⁻² (d). For each picture, the intensity values have been optimized for visual purposes.</p

Phantom WM bundles tractography.

<p>A portion of the corticospinal tract (a), pathways of the forceps minor (b), tracts following the cingulum (c), streamlines belonging to the fornix (d), and part of the uncinate fasciculus (e).</p

Estimated phantom fODF for different resolutions.

<p>Top left: ROI. ROI magnification for: voxel size = 1.4 × 1.4 × 1.4 mm³ (a), voxel size = 2.1 × 2.1 × 2.1 mm³ (b). SNR = inf.</p