Revolution CT Monoenergetic Imaging in Chest Angiography Optimize the Display of Large Blood Vessels
Objective To explore the application value of energy spectrum CT single energy technique combined with ASIR-V in improving the image quality of thoracic large vessels.Methods Fifty patients who were underwent chest energy spectrum mode enhanced scanning were collected.Six sets of images of single energy 55keV,60keV,65keV,70keV,80keV,and conventional 120 kVp-like were reconstructed,respectively.Objective analysis was conducted to compare the differences in CT values,background noise(SD),contrast to noise ratio(CNR)of pulmonary artery(PA),pulmonary vein(PV),and descending aorta(AA)and beam-hardening artifact(BHA)of ascending aorta.Subjective evaluation of the image quality of each group was performed and statistically analyzed.Results Subjective scores showed that the two doctors had a good evaluation of the consistency of images in the six groups(Kappa＞0.75,P＜0.05),with the 65 keV single energy image score(4.78±0.57)higher than the other five groups;Objectively,as the keV of single energy increased,the BHA,CT values,CNR,and SD all showed a downward trend.The CT values of 55 to 70 keV single energy were higher than those of conventional 120 kVp-like images(P＜0.05).The BHA of 80 keV single energy was the smallest,and the effect of reducing artifacts was the best.Compared with the conventional 120 kVp-like images,the subjective optimal 65 keV images showed statistically significant differences in CT values,CNR,and SD of each vessel(P＜0.05).Conclusion Using 65keV single energy ensures lung enhancement quality while optimizing vascular imaging,reducing repeated examinations at the same site,and indirectly reducing the harm caused by radiation and contrast agents for patients.
TomographyX-ray ComputerOptimal Single EnergyChest EnhancementBeam-hardening Artifact
NETL
NSTL
万方数据
维普
