脑梗塞患者颈动脉斑块分布及超声背向散射积分分析

Analyzes of carotid plaques and integrated backscatter in patients with cerebral infarction

目的:定量分析脑梗塞患者的颈动脉斑块分布及其声学组织定征特点,探讨预测脑梗塞发生的超声提示性诊断指标。方法:对76例经CT或MRI诊断的单一血管供血区梗塞的脑梗塞患者和60例健康对照受检者进行对比研究, 观察颈动脉斑块分布、回声性质、背向散射积分(IBS)值、斑块引起狭窄动脉病例数。结果:脑梗塞组颈动脉狭窄病例数显著增多(P<0．01)。脑梗塞组颈动脉斑块混合回声、弱回声、低回声、强回声的发生率分别为45％、36％、 10％、9％,与对照组的发生率15％、8％、26％、51％相比,差别均显著(P<0．01)。强回声IBS值(42．60± 5．76)dB;低回声IBS值(33．01±4．51)dB,弱回声IBS值(28．13±4．46)dB,两两比较P均<0．01。结论:超声组织定征技术能够定量分析颈动脉斑块的组织成分,对脑梗塞发生有提示性诊断作用。

Objective：To study the ultrasound diagnostic indicators for cerebral infarction （CI） by quantitatively analyz ing the plaque distribution and integrated backscatter （IBS） in the carotid artery. Methods ： A total of 76 patients and 60 control subjects were enrolled in this study. The position, echo property. IBS value of the carotid plaques and the ratio of carotid stenosis were observed. Results： The ratio of carotid stenosis of 76 CI patients was （37.0%. 28/ 76 ）. it was more than control group （13.3%, 8/60）, P〈0. 01. The occurrence rates of heterogeneous, weak, low echoes and high echo plaques were 45%, 36%, 10% and 9% respectively in CI patient group, and more than control group （15%, 8%, 26%, 51% respectively）, P〈0. 01. The IBS value of high-density echo, low and weak echoes were （42.60±5.76） dB. （33.01±4.51） dB. （28.13±4.46） dB respectively. They had significant difference each other （P〈0. 01 all）. Conclusion： Integrated backscatter can evaluate the composition of carotid plaque structures. It possesses diagnosis value for cerebral infarction.