肺灌注断层显像和平面显像对肺栓塞诊断的价值研究

The role of lung perfusion tomography in the diagnosis of pulmonary embolism in comparison with planar perfusion imaging

目的:评价肺灌注断层显像对肺栓塞(PE)的诊断价值。方法:对76例确诊为PE的患者进行肺灌注断层和平面显像,次日行肺通气显像,显像结果和CT肺动脉造影(CTPA)进行对比分析。结果:在76例PE患者中,肺灌注断层显像阳性72例,检出率为94.7%;肺灌注平面显像阳性64例,检出率为84.2%,两种方法PE检出率差异有统计学意义(P<0.05)。76例患者中,CTPA显示受累肺段为329个,肺灌注断层显像示314个肺段阳性,肺灌注断层显像与CTPA的符合率为95.4%;肺灌注平面显像示261个肺段阳性,两者符合率为79.3%,两符合率比较,差异有高度统计学意义(P<0.01)。结论:肺灌注断层显像能显著提高对PE的诊断率,可作为诊断PE的常规筛查方法。

Objective： To evaluate the clinical value of lung perfusion tomography in the diagnosis ot pulmonary embolism （PE）. Methods： Lung perfusion tomography and planar imaging were done in 76 patients with planar perfusion imaging of PE. The results were compared with those of spiral CT pulmonary arteriography （CTPA）. Results： Among all the 76 patients with lung perfusion tomography and planar imaging, the detection rates of PE were 94.7% （72 cases） and 84.2% （64 cases） respectively. There was a significant difference between the two methods （P〈0.05）. There were 329 abnormal segments in the 76 patients with CTPA results. The lung perfusion tomography were 314 abnormal segments, with a 95.4% coincident rate. The lung planar perfusion imaging were 261 abnormal segments, with a 79.3% coincident rate. Detection rate showed a significant difference （P〈0.01）. Conclusion： The lung perfusion tomography can improve the performance of diagnosis of PE notably, and it will become the first election routine in the diagnosis of PE.