Fig. 2.

Scheme of the similarity-based approach for estimating an aneurysm’s rupture status. For a new case, aneurysms from our database with the same location and values of aneurysm size (Asize), maximum OSI (OSImax) and non-sphericity index (NSI) within a five percent range of the values of the new case were selected. If no aneurysms fulfilling these criteria were identified, the range was increased by five percentage points until at least one aneurysm was found or the percent range reached 200 %. If more than one aneurysm was identified for a specific range, the majority vote was taken. In case of the same number of ruptured and unruptured IAs, the rupture status of the aneurysm with the closest aneurysm size was selected