Abstract: Objective To explore and study the clinical effects of high-resolution magnetic resonance imaging in evaluating the effect of vascular morphology on wave dynamics. Methods A total of 82 patients with cerebral ischemia and cerebral hemorrhage who were diagnosed and treated in the Third People’s Hospital of Baiyin City, Gansu Province from January 2018 to January 2022 were selected and divided into ischemia groups according to different types of cerebrovascular diseases (n=36) and the bleeding group (n=46). All patients were examined by high-resolution magnetic resonance imaging (MRI), and were to evaluate the values of vascular morphology on wave dynamics, and were to judge the diagnostic value. Results The cerebral hemorrhage group were more showed low signal on T1WI, high signal on T2WI and high signal on DWI; In cerebral ischemia group, most of them showed equal signal or high signal on T1WI, high signal on T2WI and DWI. The time to peak (TTP) of intracerebral hemorrhage group were higher than that of cerebral ischemia group (P<0.05), and the cerebral blood flow (CBF) were lower than that of cerebral ischemia group (P<0.05). There were no significant difference compared between the two groups in cerebral blood volume (CBV) and mean transit time (MTT) (P>0.05). Used the b values of 500 s/mm² and 800 s/mm², the apparent diffusion coefficient (ADC) of intracerebral hemorrhage group were lower than that in cerebral ischemia group (P<0.05). With clinical and MRI routine imaging diagnosis as the gold standard, there were 33 cases were diagnosed as cerebral ischemia and 49 cases as intracerebral hemorrhage by high-resolution MRI in the 82 cases. The sensitivity and specificity of high-resolution MRI in the differential diagnosis of cerebral ischemia and intracerebral hemorrhage were 88.9% (32/36) and 97.8% (45/46). The receiver operating characteristic curve (ROC) curve showed that the area under the curve of high-resolution MRI for differential diagnosis of cerebral ischemia and cerebral hemorrhage was 0.836. Conclusion The evaluation of high-resolution MRI technology is helpful to evaluate the changes of vascular morphology and wave dynamics in patients with cerebral ischemia, which can effectively differentiate between cerebral ischemia and cerebral hemorrhage, and has a good application value.

Key words: high resolution, magnetic resonance imaging, cerebral ischemia, cerebral hemorrhage, vascular morphology, wave dynamics