目的 对比SPECT，探讨双源 CT(DSCT)双能量心肌灌注成像的临床应 用价值。方法 搜集18例临床怀疑冠心 病或已知冠心病史的患者行双源CT双能 量心肌灌注成像和静息/负荷心肌灌注 锝-99mSPECT显像检查，并对其影像表现 进行分析。结果 DSCT双能量心肌灌注成 像检查18例患者，发现阳性14例，阴性4 例。对比SPECT检查，14例DSCT阳性病例 中，SPECT均发现了相同心肌部位的灌注 缺损。而4例阴性病例中，SPECT检查有1 例有心肌缺血。二者检出心肌灌注缺损 的差异性无统计学意义(P>0.05)。结论 DSCT双能量心肌灌注成像发现心肌灌注缺 损的能力与SPECT大致相符，对冠心病的 诊断有较大价值。

Objective To evaluate the clinical value of the myocardial perfusion imaging dual-source CT (DSCT) dual energy, in the comparison of SPECT. Methods 18 cases of clinically suspected or known coronary artery disease were of collected. Then the patients underwent the myocardial perfusion imaging of DSCT and resting /loaded technetium99m SPECT.The imaging findings then were analyzed further. Results In 18 patients with DSCT dual energy myocardial perfusion imaging, 14 cases were positive, when 4 cases were negative. Compared with SPECT examination, the same cardiac perfusion defect of 14 positive cases were found in SPECT as in DSCT. Among 4 negative cases of DSCT examination, loaded SPECT detected myocardial ischemia in 1 case. Detection rates of cardiac perfusion defect between DSCT with SPECT showed no significant difference(P>0.05). Conclusion The myocardial perfusion imaging in DSCT dual energy possess the similar capability in myocardial perfusion defects with SPECT, and manifest great diagnosis value for coronary heart disease.