Dual source CT prospective electrocardiography-gated pulmonary angiography in diagnosis of pulmonary embolism

Objective To explore the application value of dual source CT(DSCT) prospective electrocardiography(ECG)-gated pulmonary angiography in the diagnosis of pulmonary embolism(PE).Methods Totally 60 patients with PE were randomly divided into 3 groups(each n=20).Prospective ECG-gated,retrospective ECG-gated pulmonary angiography and non ECG-gated thoracic enhanced scan was performed to group A,group B and group C,respectively.The effective dose(ED) and image quality score of 3 groups were compared.Results The value of ED was(4.95±1.81)mSv in group A,(15.91±5.01)mSv in group B and(4.61±1.16)mSv in group C,respectively.There was statistical difference between group A and B,as well as between group B and C(both P0.05),while there was no statistical difference between group A and C(P0.05).The total points of image quality score in 3 groups were 57,58 and 45,respectively.Statistical differences were found between group A and B and between group A and C(both P0.05),but no statistical difference was found between group B and C(P0.05).Conclusion Prospective giving consideration to image quality and radiation dosage in diagnosing PE,ECG-gated pulmonary angiography should be considered as a safe and credible method.