Objective:To evaluate the feasibility of using gadopentetate dimeglumine(Gd-DTPA)for dual-energy computed tomography pulmonary angiography(CTPA).Methods:Sixty-six patients were randomly divided into three groups and underwent CTPA.Group A had a turbo flash scan using an iohexol injection,Group B had a turbo flash scan using Gd-DTPA,and Group C had a dual-energy scan using Gd-DTPA.The original images of Group C were linearly blended with a blending factor of 0.5 or reconstructed at 40,50,60,70,80,90,100,and 110 keV,respectively.The groups were compared in terms of pulmonary artery CT value,image quality,and radiation dose.Results:The pulmonary artery CT values were significantly higher in Group C40keV than in Groups B and C,but lower than in Group A.There was no significant difference in the image noise of Groups C40keV,B,an C.Moreover,Group A had the largest beam hardening artifacts of the superior vena cava(SVC),followed by Groups B and C.Group C40 keV showed better vascular branching than the other three groups,among which Group B was superior to Group A.The subjective score of the image quality of Groups A,B,and C showed no significant difference,but the score was significantly higher in Group C40keV than in Groups A and B.The radiation dose was significantly lower in Group B than in Groups A and C.Conclusion:Gd-CTPA is recommended to patients who are unsuitable for receiving an iodine-based CTPA.Furthermore,a turbo flash scan could surpass a dual-energy scan without consideration for virtual monoenergetic imaging.

An XIE;Wen-jie SUN;Yan-feng ZENG;Peng LIU;Jian-bin LIU;Feng HUANG

Department of Radiology,Hunan Provincial People's Hospital,First Affiliated Hospital of Hunan Normal University,Changsha 410005,China;Department of Radiology,Hunan Chest Hospital,Changsha 410013,China

当代医学科学(英文)

[1]An XIE;Wen-jie SUN;Yan-feng ZENG;Peng LIU;Jian-bin LIU;Feng HUANG-.Gadolinium Enhances Dual-energy Computed Tomography Scan of Pulmonary Artery)[J].当代医学科学(英文),2022(06):1310-1318

gadopentetate,dimeglumine,iohexol,C40keV

Gadolinium,Enhances,Dual,energy,Computed,Tomography,Scan,Pulmonary,Artery,Objective,evaluate,feasibility,using,Gd,DTPA,dual,computed,tomography,pulmonary,angiography,CTPA,Methods,Sixty,six,patients,were,randomly,divided,into,three,groups,underwent,had,turbo,flash,scan,injection,original,images,linearly,blended,blending,reconstructed,respectively,compared,terms,artery,quality,radiation,dose,Results,values,significantly,higher,than,Groups,but,lower,There,was,difference,noise,Moreover,largest,beam,hardening,artifacts,superior,vena,cava,SVC,followed,by,showed,better,vascular,branching,other,among,which,subjective,score,Conclusion,recommended,who,unsuitable,receiving,iodine,Furthermore,could,surpass,without,consideration,virtual,monoenergetic,imaging

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