多层螺旋CT冠状动脉成像与SPECT心肌灌注显像的相关性研究

Correlation Study between 16 Slice Spiral CT Coronary Angiography and SPECT Myocardial Perfusion Imaging

目的通过同时行多层螺旋CT冠状动脉成像(CTCA)和单光子发射计算机断层(SPECT)心肌灌注显像检查,分析不同程度、类型、部位的冠状动脉狭窄的病理解剖学改变与心肌灌注缺损的病理生理学变化之间的相互关系。探讨冠状动脉粥样硬化性心脏病诊断的检查流程。资料与方法应用Toshiba Aquilion 16层螺旋CT及Si-emens e.cam+双探头SPECT,对51例行CTCA检查及SPECT心肌灌注显像。结果 51例患者共计冠状动脉左前降支(LAD)、左回旋支(LCX)、右冠状动脉(RCA)153支,其中正常45支,冠状动脉狭窄108支。狭窄<25%者24支、26%～50%者30支、51%～75%者33支、>75%者21支。SPECT心肌灌注显像51例,按照LAD、LCX、RCA三支动脉所供血范围统计,灌注正常73支;灌注减低80支。轻度减低34支、中度减低36支、严重减低10支。结论冠状动脉狭窄与心肌灌注缺损存在正相关性。

Objective CTCA and SPECT Myocardial Perfusion examination were performed at the same time. The correlation between the myocardial perfusion defect and the coronary stenosis in different degrees, types and locations were ana-lyzed to discuss the examination flow for coronary disease. Materials and Methods Fifty one patients underwent CTCA and SPECT Myocardial Perfusion examination using TOSHIBA AQUILION 16 Slice Spiral CT and Siemens e. cam ＋ dual - head SPECT. Results CTCA showed 108 stenosis branches, among them, stenosis degree 〈25% in 24 branches,26% - 50% in 30 branches, 51% -75% in 33 branches, 〉75% in 21 branches. SPECT Myocardial Perfusion Imaging showed normal perfusion in 73 branches, slightly decreased perfusion in 34 branches, moderately decreased perfusion in 36 branches,and severely decreased perfusion in 10 branches. Conclusion The stenosis degree of coronary arteries is positively correlated with myocardial perfusion defect.