Related Factors Analysis Of Intracranial Aneurysms Rupture By MSCTA

Objective: Related factors analysis of intracranial aneurysms rupture by MSCTA，in order to predict the risk of aneurysms rupture.Methods: Collecting forty-eight patients of spontaneous subarachnoid hemorrhage whowere diagnosed with intracranial ruptured aneurysms by MSCTA and eighteen patientsof no subarachnoid hemorrhage who were diagnosed with intracranial aneurysms by MSCTAretrospectively in imaging center of Qinghai University Affiliated Hospital duringthe period of April2010-February2012，male is thirty，female is thirty-sixmale:female=0.83:1,range of age is30-72years, average age52.76±11.48years old.Allpatients through the Philips Brillance16row and256layer spiral CT scan，(1)16row scanning conditions：tube voltage120KV，the current300mA，layer thick0.8mm，layer distance1mm，pitch1，512x512matrix，set the speed of4.0-4.2ml/s，the volumeis about60-80ml(2)256layer spiral CT scanning conditions：tube voltage120KV, thecurrent300mA，layer thick0.9，layer distance0.5mm，pitch0.825，512x512matrix，set contrast injected speed of5.0ml/s，the volume is about40-50ml.All of the patientstake supine，placed both hands on both sides of the body，the right hand arm injectedby needle，before scan，to construct patients to try to relax，Positioning as scanning，take tracer point in the aortic arch, set the trigger threshold for120HU, and thenchoose to cranial roof is the aortic arch scanning range, when the aortic arch takepoints to120HU，then contrast agents inject at the same time of automatic scanning，after scanning，transmitted rebuilding image to Extended Brilliance TM WorkspaceRelease2.0(16row)and4.5(256layer) for post-processing； in post-processingworkstation，measuring parameters，place，morphological charact-eristics，and so onfor comparison of ruptured and unruptured aneurysms.Result:(1)Among sixty-six patients，there are seventy-eight aneurysms，of which256row have ten patients-thirteen aneurysms, the rest is in16row；unruptured aneurysmis thirty, long diameter <10mm is twenty-six，ruptured aneurysms is forty-eight， long diameter <10mm is forty-one，five aneurysms have ascus；40-65years old isforty-five,<40years old is ten,>65years old is eleven；(2)There are forty-fiveaneurysms placed in bifurcate intracranial artery，ruptured aneurysms is thirty-two，unruptured aneurysms is thirteen；there are thirty-three aneurysms placed in notbifurcate intracranial artery, ruptured aneurysms is sixteen, unruptured aneurysmsis seventeen；ruptured aneurysms more place in bifurcate intracranial artery aneurysm，which have statistically significant；(3)In order to increase research preciseness，excluding influence factors，measuring and comparing long and short diameter，aneurysmneck wide of49aneurysm，ratio of long diameter with aneurysm neck wide and shortdiameter with aneurysm neck wide, ruptured and unruptured aneurysms group is dividedinto All and long diameters of aneurysms <10mm，in ALL and long diameters of aneurysms<10mm：the long，short diameter and neck width of aneurysms in two group have nostatistically significant(P>0.05)；in ALL：the ratio of long diameter with aneurysmneck width，ruptured aneurysms is2.13±0.83,unruptured aneurysms is1.63±0.51,whichhave statistically significant(t=2.375, P<0.05)，the radio of short diameter withaneurysm neck width，ruptured aneurysms is1.63±0.66,unruptured aneurysms is1.29±0.38，which have statistically significant(t=2.103，P<0.05)；in long diameters ofaneurysms <10mm: ratio of long diameter with aneurysm neck width，ruptured aneurysmsis1.93±0.59,unruptured aneurysms is1.54±0.31,which have statisticallysignificant (t=2.634, P<0.05)；ratio of short diameter with aneurysm neck width，ruptured aneurysms is1.49±0.51, unruptured aneurysms is1.23±0.30，which have nostatistically significant (t=1.945,P>0.05).Conclusions：The position of aneurysm, ratio of long diameter with aneurysm neck wideand short diameter with aneurysm neck wide is the influence factors of rupturedaneurysms, which have statistical significance.