磁共振灌注成像在诊断急性左室乳头肌梗死中的价值  

The Value of MR First-pass Perfusion Imaging in the Diagnosis of Acute Left Ventricular Papillary Muscles Infarction

作　　者：李胜凯[1] 张思裕 于昭[1] 林优[1] Li Shengkai;Zhang Siyu;Yu Zhao;Lin You(Department of Radiology,Meizhou Peoplee Hospital,Meizhou,Guangdong 514031)

机构地区：[1]梅州市人民医院放射科,广东梅州514031

出　　处：《现代医用影像学》2020年第8期1384-1387,共4页Modern Medical Imageology

基　　金：广东省梅州市科技局立项课题(2017B020)。

摘　　要：目的:探讨磁共振灌注成像在诊断急性左心室乳头肌梗死中的应用价值。方法:回顾分析2017年9月至2020年4月经过临床及影像学确诊的7例急性左室乳头肌梗死的病人的MRI检查数据,通过工作站处理,分别计算出首过灌注正常心肌及病变乳头肌的曲线上升时间、信号强度变化率和最大上升斜率,用Dunnett-t检验比较病变乳头肌、正常乳头肌与正常室壁心肌的最大上升斜率;延迟增强序列,对病变乳头肌及正常乳头肌信号强度进行两独立样本均数的t检验。结果:正常室壁心肌及正常乳头肌slope分别平均16.48、15.55,组间比较差异没有统计学意义(t=1.05,P>0.05);病变乳头肌信号强度上升缓慢,ΔT延长,ΔSI降低,slope明显低于正常室壁心肌,平均为3.75,差异具有统计学意义(t=14.37,P<0.05)。延迟增强扫描病变乳头肌信号强度值为91.33±34.54,正常乳头肌为24.66±9.04,差异具有统计学意义(t=4.94,P<0.05)。结论:MR灌注成像在诊断急性左心室乳头肌梗死中具有重要价值。Objective:To evaluate the value of magnetic resonance perfusion imaging in the diagnosis of acute left ventricular papillary muscle Infarction.Methods:The MRI data of 7 patients with acute left ventricular papillary muscle infarction diagnosed by clinical and imaging from September 2017 to April 2020 were retrospectively analyzed,the curve rise time, change rate of signal intensity and maximum rising slope of normal myocardium and diseased papillary muscle were calculated respectively by workstation, Dunnett-t test was used to compare the maximum rising slope between the diseased papillary muscle, normal papillary muscle and normal ventricular wall myocardium.Results:The normal ventricular wall myocardium and normal papillary muscle slope averaged 16.48 and 15.55, respectively, there was no significant difference between the groups(t=1.05, P>0.05). the diseased papillary muscle signal intensity increased slowly,ΔT prolonged,ΔSI decreased, and the slope was significantly lower than that of normal ventricular wall myocardium, with an average of 3.75, the difference was statistically significant(P>0.05). The signal intensity values of papillary muscle were 91.33±34.54, and that of normal papillary muscle was 24.66±9.04, the difference was statistically significant(t=4.94, P<0.05).Conclusion:Perfusion imaging is of great value in the diagnosis of acute left ventricular papillary muscle infarction.

关 键 词：乳头肌 急性梗死 磁共振 灌注成像 

分 类 号：R542.22[医药卫生—心血管疾病] R445.2[医药卫生—内科学]