摘要
Abstract
Objective:To explore the clinical application effect of 1.5T medium-field strong magnetic resonance angiography(MRA)in the diagnosis of intracranial vascular stenosis in ischemic cerebrovascular disease(ICVD),and to provide practical references for vascular examination of ICVD in primary hospitals.Method:A retrospective selection was made of 108 patients with ICVD admitted to the First Ward of Neurology of Daye People's Hospital from June 2024 to December 2025 as the research subjects.All patients completed 1.5T strong MRA of the brain and digital subtraction angiography(DSA)of the whole brain.DSA was taken as the gold standard.The diagnostic efficacy of 1.5T medium-intensity MRA for intracranial stenosis of major responsible vessels was compared,and the accuracy rate,sensitivity,specificity and other efficacy indicators for diagnosing vessels with a stenosis rate of≥50％were analyzed.Result:The 1.5T midfield strong MRA can clearly and multi-directional display the morphology of intracranial large blood vessels.Its diagnosis of the degree of vascular stenosis is highly consistent with that of DSA(Kappa=0.8093),and the stenosis rate measured by MRA is not lower than that measured by DSA.For blood vessels with a stenosis rate of≥50％,the diagnostic accuracy of 1.5T medium-intensity MRA was 94.4％,the sensitivity was 100％,the specificity was 53.8％,the positive predictive rate was 94.1％,and the negative predictive rate was 100％.Conclusion:The 1.5T mid-field strong MRA operation is non-invasive and highly popular.It has high clinical value in the diagnosis of intracranial vascular stenosis in ICVD and can be used as a preoperative pre-examination and initial screening method for cerebral vascular stenosis in ICVD patients in primary hospitals.For patients with mild vascular stenosis,it can replace DSA examination and provide reliable basis for clinical diagnosis and treatment at the primary level.However,overestimation may occur when diagnosing severe vascular stenosis,and a DSA examination is required for confirmation.关键词
1.5T中场强磁共振血管成像/数字减影血管造影/缺血性脑血管病/颅内血管狭窄/诊断效能Key words
1.5T medium-field magnetic resonance angiography/Digital subtraction angiography/Ischemic cerebrovascular disease/Intracranial vascular stenosis/Diagnostic efficacy
