FIGURE 3.

A group of aneurysms with similar match score were presented here. This was an unruptured middle cerebral artery aneurysm (a.1,2). SR was 1.7. AR was 1.2 (a.2). DA was 19°(a.3). NWSS of aneurysm was close to that of parent artery (a.4). There was no area with increasing OSI (a.5). There was no obvious low WSS area in this aneurysm (a.6). This was a ruptured anterior communication artery aneurysm (b.1,2). DA, SR and AR were 37°, 3.6, and 2.4, respectively, which were much higher than unrupture aneurysm (b.2,3). NWSS was lower comparing to parent artery (b.4). Area with obviously increasing OSI could be found (b.5). Large area with low WSS could be found in the dome of aneurysm (b.6).