The Discussion of Bronchial Artery CT Angiography Technique in Lung Carcinoma using 16 Silices Spiral CT

Objective To discuss the technique and methods of 16-slices spiral CT angiography(SCTA)of bronchial artery in pulmonary carcinoma patients. Materials and Methods The CT angiography of bronchial artery were performed using 16-slices spiral CT in 96 cases of pulmonary carcinoma. The 96 cases were randomly divided into 5 groups,group 1(n=18),2(n=18),3(n=19),4(n=20),5(n=21). The scan skill of each group was different. Volume rendering(VR),maximum intensity projection(MIP)were used as three-dimensional models. Results After injection of constrast medium,the increased CT value of aorta was (183.43±19.65)HU(group 1),(218.64±18.20)HU(group 2),(269.69±42.21)HU(group 3),(326.11±77.19)HU(group 4),328.61±62.38(group 5).The increased CT value of bronchial arteryes was (116.24±38.68)HU(group 1),(156.41±42.71)HU(group 2),(157.75±57.17)HU(group 3),(181.45±56.25)HU(group 4),195.54±53.94(group 5).The increased CT value of pulmonary artery was(146.63±46.79)HU(group 1),(176.48±64.44)HU(group 2),(179.62±69.84)HU(group 3),(240.44±81.18)HU(group 4),115.10±36.13(group 5). The increased CT value of superior cavity vein was (291.39±159.71)HU(group 1),(385.90±240.73)HU(group 2),(414.47±275.78)HU(group 3),(435.19±311.09)HU(group 4),166.24±67.66(group 5).The excellent rate of bronchial artery was 61.11%(group 1),72.22%(group 2),78.95%(group 3),80%(group 4) and 90.48%(group 5). Conclusion The technique of group 5,with nonionic contrast agent 370 mgI/ml,60 ml,4 ml/s,bolus tracking skill,were effective methods of 16 slices spiral CT angiography of bronchial artery in pulmonary carcinoma.