JIAO Zhiyun, LI Zheng, XU Wenjuan, GUAN Maobin, ZHAI Runya, ZHANG Meiling. Value of dual-source and dual-energy CT in diagnosisof peripheral pulmonary embolism[J]. Journal of Clinical Medicine in Practice, 2021, 25(4): 34-37. DOI: 10.7619/jcmp.20201690
Citation: JIAO Zhiyun, LI Zheng, XU Wenjuan, GUAN Maobin, ZHAI Runya, ZHANG Meiling. Value of dual-source and dual-energy CT in diagnosisof peripheral pulmonary embolism[J]. Journal of Clinical Medicine in Practice, 2021, 25(4): 34-37. DOI: 10.7619/jcmp.20201690

Value of dual-source and dual-energy CT in diagnosisof peripheral pulmonary embolism

  •   Objective  To investigate the the diagnostic value of dual-source and dual-energy CT for peripheral pulmonary embolism.
      Methods  Among the patients with clinical suspected pulmonary embolism (PE) and dual-source and dual-energy CT pulmonary angiography, 36 cases (98 emboli) of peripheral PE were included in the study. Syngo. via workstation was used to perform post-processing of CT pulmonary angiography (CTPA) and CT dual-energy Lung Analysis on the dual-source dual-energy CT scan data, and the PE embolization sites and the number of emboli were recorded. Chi-square test was used to compare the diagnostic efficacy of the two post-processing methods for peripheral PE.
      Results  CTPA detected a total of 85 PE emboli, including 44 in segmental arteries, 41 in sub-segmental arteries and distal pulmorany arteries. CT dual-energy Lung Analysis software combined with lung perfusion defect of lung perfusion blood volume(Lung PBV) and Lung Vessels detected 94 emboli, including 43 in segmental arteries, 42 in sub-segment arteries, and 9 in sub-segmental arteries or more distal pulmorany arteries. The detection rate of peripheral PE emboli by CT dual-energy Lung Analysis was significantly higher than that of CTPA (χ2=5.217, P=0.022), and more difference were found in subarterial and more distal pulmorany arteries(χ2=8.230, P=0.004).
      Conclusion  CT dual-energy Lung Analysis combined with Lung PBV and Lung Vessels can directly show the embolism locations and the abnormal pulmonary perfusion, and has a higher diagnostic efficiency for peripheral PE, especially for sub-segment and sub-segment below PE.
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