BACKGROUND: The risk of @entity1756 appears to be related to multiple factors such as topology, morphology, size, perianeurysmal environment, and blood flow hemodynamics. OBJECTIVE: To evaluate @entity439 morphology and to quantitatively compare the volumetric parameters between @entity1756 from our clinical database at the UCLA Medical Center. METHODS: Novel algorithms that automatically compute @entity439 geometry were tested on the basis of voxel data obtained from angiographic images, and measurements of @entity439 morphology were automatically recorded. We studied a total of 50 @entity439 (25 ruptured and 25 unruptured) with sizes ranging from 3 to 26 mm. To compare the geometric characteristics between ruptured and unruptured groups, we examined measurements, including volume and surface area, and the ratios of these measurements to the minimal bounding sphere around each @entity439 . RESULTS: More than 65% of @entity1756 had a ratio of @entity439 volume to bounding sphere volume (AVSV) of > 0.5. More than 70% of @entity1756 had a ratio of @entity439 surface to bounding sphere surface (AASA) of < 1. A trend differentiating @entity1756 was observed in AVSV (P = .07) and AASA (P = .04). Classification and regression trees analysis showed 68% correct classification with @entity397 for AVSV and 70% for AASA. CONCLUSION: By comparing @entity439 geometry with the bounding sphere, we found a trend associating the ratios of @entity439 volume and surface area with @entity397 . These geometric parameters may be useful for understanding the influence of morphology on the risk of @entity1756 .

Comparative morphological analysis of the geometry of XXXX .

@entity397 :: ('MESH:D012421', 'Disease') :: ['rupture'] @entity439 :: ('MESH:D000783', 'Disease') :: ['aneurysms', 'aneurysm'] @entity1756 :: ('MESH:D017542', 'Disease') :: ['ruptured aneurysms', 'ruptured and unruptured aneurysms', 'aneurysm rupture']
@entity1756 :: (MESH:D017542,Disease) :: ['ruptured and unruptured aneurysms']
