Fig 1.
Calculation of retinal vessel metrics with MONA REVA software and FracLac plugin in FIJI software.
The concentric circles on the segmented images indicate the regions of interest (ROIs) in which the metrics were calculated. R is defined as the radius of the optic disc (inner red circle). For ROI 1 and ROI 2, radii of the larger circles are a multiple of R. The entire segmented without the optic disc is ROI 3. Note: the segmented image is a representative example and not the segmented image of the shown greyscale image.
Table 1.
Demographic, metabolic and clinical characteristics of the participants (n = 35) with acute ischemic stroke with good and poor pial collaterals expressed as mean ± SD.
Table 2.
Retinal vessel metrics comparing controls to patients with acute ischemic stroke and between patients with good and poor collaterals expressed as mean ± SD.
Fig 2.
Planar projection of the Principal Component Analysis with 3 principal components represented explaining a total variance of 75.1%.
Patients with good collaterals are represented with blue circles and poor collaterals with red circles.
Fig 3.
Scatterplot for the support vector machine learner and the corresponding confusion matrix based on leave-one-out cross validation of the classification.
Patients with good collaterals are represented with blue circles and poor collaterals with red circles.