Novel Methods for the Visualization and Analysis of Functional Maps in Cortex

Introduction to mrFindBorders 51 Another important list box can be found on the right side. It is labeled “Current Data Set” (Figure 23 right). mrFindBorders uses a hierarchical approach when matching an initial atlas to the measured data. At the beginning, “very low-resolution images” (currently always 33 pixels x 33 pixels) are matched (see Figure 25). Then, in the second step, “low-resolution im- ages” (65 pixels x 65 pixels) are used, and finally “high-resolution images” (129 pixels x 129 pixels) are matched. In addition to the initial data set (based on the displacement fields before automatic matching), the results of the different stages of the multi-resolution matching pro- cedure can be displayed by selecting from the “Current Data Set” list box. The last entry in this list box is to select gold standard (reference) visual-area ROIs. These are visual-area ROIs that are expected to be correct. They can be created by an experienced human user. Figure 24: Only area V1 is marked (after registration)