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The aim of the present study was designed to take advantage of dual-energy dual-source CT in patients with pulmonary embolism pulmonary imaging studies to explore the value of dual-energy dual-source CT pulmonary angiography in the diagnosis of pulmonary embolism. Methods 20 patients with clinically suspected pulmonary embolism patients (group A) line of dual-energy dual-source CT pulmonary angiography, and 3 cross-sectional original image, 140kV, 80kV and 140kV and 80kV fused image of a group, image reconstruction layer thickness of 1.5mm, the interlayer spacing 1.0mm, the 140kV and 80kV two sets of thin-layer image transmitted to the workstation, use the syngo dual energy software in Lung PBV algorithm DE perfusion images (DEPI); 140kV and 80kV fusion to a thin layer of image input 3D software for vascular MPR images (V-MPR), 2 chest imaging diagnosis expert on angiography naked eye, were observed in the V-MPR DEPI scan and whether the pulmonary emboli exist, according to the emboli display case for all levels of pulmonary emboli determine divided into three, namely: clear (), fuzzy (+) and negative (a) list records of the observations, analysis the DEPI and V-MPR displayed directly emboli the differences and advantages of a combination of both; retrospective analysis of another 16 cases have been diagnosed with pulmonary embolism patients (group B), 64-slice spiral CT pulmonary image reconstruction into a thickness of 1.5 mm, the layer spacing 1.0mm, the transmitted Volume Wizard workstation 3D interface V-MPR images, two chest diagnostic imaging experts 2 vascular MPR images naked eye evaluation, evaluation index display capabilities, all levels of pulmonary vascular emboli display capabilities, image holistic view. 1, the naked eye MPR image quality of the A group and B group, the results showed that the overall concept of the image is better and was not significantly different; 2, A group DE infusion Figure vascular MPR figure shows the ability of the pulmonary trunk and leaves pulmonary emboli The display capabilities no difference in the display segment and sub-segment pulmonary emboli, two differences; pulmonary trunk and leaves artery A group memory in emboli, DE perfusion figure apparent hypoperfusion area 40 segmental arteries memory in emboli DE perfusion map see slightly lower perfusion area, the remaining segment and sub-segment pulmonary emboli de perfusion Figure no significant perfusion; 4, group A, 4 cases DE perfusion image see hypoperfusion area, levels of pulmonary embolus has not yet seen, and the remaining 16 cases DE perfusion images see hypoperfusion area visible within the pulmonary embolus. Conclusion DSCT time injection of contrast agent to complete the first dual-energy pulmonary angiography scan can clearly show pulmonary emboli, and the emboli display with no difference in the 64-slice spiral CT image quality, but also the blood of lung tissue after embolization flow perfusion evaluated. The DSCT significance of contrast injection, a chest dual-energy enhanced scan, pulmonary angiography and lung perfusion imaging line, this is a multi-slice spiral CT (64-slice spiral CT) can not be achieved. The DSCT dual-energy pulmonary angiography clearly show the pulmonary emboli, but also at the same time to evaluate lung tissue perfusion after embolization to guide clinicians evaluation of pulmonary embolism after lung function changes in a timely manner, in order to take appropriate measures for patients treatment. The future, with the the DSCT technical and post-processing software development and awareness on the DSCT dual energy lung perfusion technique continues to deepen, DSCT will play an important role in the diagnosis of pulmonary embolism, functional assessment, and efficacy evaluation.
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