Preliminary Study Of Intracranial Blood Vessels Using SNAP Sequence

purpose Application of magnetic resonance three-dimensional synchronous non-enhanced angiography and intra-plaque hemorrhage sequence(3D-SNAP)for plaque stress analysis of intracranial responsible vessels in patients with cerebral infarction,and to explore the diameter and plaque of cerebral infarction in the middle cerebral artery(MCA)The relationship of load can further improve the evaluation of plaque.The 3D-SNAP sequence and 3D-TOF control study were used to investigate the ability of SNAP to evaluate the primary collaterals of cerebral vessels.Method 1.A total of 34 patients with ischemic stroke were enrolled in the cranial imaging examination.All the cases collected met the inclusion criteria of this study.The plaque load between the responsible vessels was compared and the diameter of the MCA donor site was measured.All plaques were manually outlined.2.Process the TOF and SNAP using the Philips workstation to generate a minimum and maximum density projection.Then,the SNAP and TOF maps of the patient’s primary collateral circulation were interpreted by blind reading.Result 1.A total of 55 plaques were identified in 34 patients,and the number of anterior,middle,and posterior cerebral arteries was 8,34,and 13,respectively.Most of the plaques in the cerebral artery and anterior stenosis are eccentric,and the posterior cerebral artery is concentric.2.The plaque load of the middle cerebral artery was statistically different from that of the anterior cerebral artery and the posterior cerebral artery.There was no statistical difference in plaque load between the anterior cerebral artery and the posterior cerebral artery(p<0.05).3.The diameter of infarction in the middle cerebral artery was positively correlated with plaque burden(p<0.05).4.The evaluation effect of SNAP on the blood vessels of the Willis ring is in good agreement with the TOF map.In conclusion: The SNAP sequence clearly shows the wall of the intracranial blood vessel and can measure the atherosclerotic plaque load,which is advantageous for evaluating plaque.The middle cerebral artery has a larger brain and anterior and posterior arterial plaque load.The greater the burden of atherosclerotic plaque in the middle cerebral artery,the greater the infarct.The SNAP sequence is of high value for the evaluation of the Willis ring.