The visual scale consists of a color map with five colors, each indicating a risk stratum. A 5-class RdYlBu color scale was used for the location impact score, which is colorblind- and printer-friendly. To calculate the five-point location impact score, the continuous location impact score (i.e. the mean voxel-wise coefficient within a patient’s infarct) was categorized into quintiles (see Figure below). To enable visual rating of the five-point location impact score, the same percentile cut-offs were applied to categorize individual voxels into five categories, corresponding with five different colors in the figure.
Predicted probabilities are shown for each of the five-point location impact score categories; note that this prediction is based on a dataset with PSCI occurrence of 44%.
The location impact score can be estimated based on the “average” color of the voxels. For example, if the infarct is located in a region with mostly red voxels (i.e. in the 80-100th percentile range), the overall location impact score will also be in the highest percentile category. Ratings can be performed using the original brain scan. Some examples of ratings are shown in the bottom panel.
Below we provide 2 options for using the visual rating scale:
- an online 3D viewer
- a downloadable PDF version containing 12 representative slices of the brain
Online 3D viewer