32 research outputs found
Results of a two-node DCM analysis applied to the flashing checkerboard experiment.
<p>The coupling parameters calculated with actual are shown alongside the corresponding connections. The values in brackets are parameters estimated with assumed . in visual area V, in V and assumed in two areas. and represent external inputs into the system; and are the hemodynamic observations and arrows indicate connections.</p
Estimated BOLD signal (Left), and reconstructed physiological states (Right) from the greatest activated locus in primary visual cortex (V).
<p>For comparative purpose, model estimation was also performed with a typical assumed . Real value is .</p
Schematic illustration of the hemodynamic Balloon model.
<p>Schematic illustration of the hemodynamic Balloon model.</p
Scatterplots of glucose metabolism in local maximum of each cluster versus age in the female group.
<p>A quadratic polynomial fitting is used to express the relationship between glucose uptake and age. (a) Left medial frontal gyrus, ; (b) Left inferior frontal gyrus, ; (c) Right superior gyrus, .</p
Reconstructed activity map of the physical phantom by FBP (<i>top left</i>), EM-ML (<i>top right</i>), EKF (<i>bottom left</i>) and UKF(<i>bottom right</i>) (arrows indicate cold areas), and the associated color scale.
<p>Reconstructed activity map of the physical phantom by FBP (<i>top left</i>), EM-ML (<i>top right</i>), EKF (<i>bottom left</i>) and UKF(<i>bottom right</i>) (arrows indicate cold areas), and the associated color scale.</p
Reconstructed attenuation (<i>left</i>, by UKF) and activity maps of the patient by UKF (<i>middle</i>) and FBP (<i>right</i>), and the associated color scales.
<p>Reconstructed attenuation (<i>left</i>, by UKF) and activity maps of the patient by UKF (<i>middle</i>) and FBP (<i>right</i>), and the associated color scales.</p
Scatterplots of glucose metabolism in local maximum of each cluster versus age in the male group (positive correlation).
<p>A quadratic polynomial fitting is used to express the relationship between glucose uptake and age. (a) Right lentiform nucleus, ; (b) Left thalamus, ; (c) Left paracentral lobule, ; (d) Right middle frontal gyrus, ; (e) Right precuneus, .</p
Synthetic Data.
<p>Top: Horizontal profiles along the (<i>left</i>), (<i>middle</i>), and (<i>right</i>) rows of the recovered activity maps for low count measurements. Bottom: Horizontal profiles along the (<i>left</i>), (<i>middle</i>), and (<i>right</i>) rows of the recovered activity maps for high count measurements.</p
Reconstructed attenuation map of the physical phantom by EKF (<i>left</i>) and UKF (<i>right</i>), and the associate color scale.
<p>Reconstructed attenuation map of the physical phantom by EKF (<i>left</i>) and UKF (<i>right</i>), and the associate color scale.</p