智能追踪触发和小剂量团注监测技术在肺动脉成像中的应用价值比较

Objective To compare the application significance and practical value of 128-slice spiral CT intelligent tracking automatic triggering technology and low-dose contrast medium bolus test technology in computed tomography pulmonary angiography(CTPA). Methods A total of 60 patients clinically suspected of pulmonary embolism who required CTPA examination in our hospital were randomly divided into two groups, with 30 cases in each group. Group A was examined with low-dose contrast medium bolus test(TB) technology, while Group B was managed with intelligent tracking automatic triggering(BT) technology. The image quality was evaluated by subjective scoring and objective assessment based on unified criteria, and the radiation dose was compared between the two groups. Results The comparison of baseline data on gender distribution, age and body mass index levels between the two groups showed no statistically significant differences(P>0.05). When using a contrast agent dose of 40 mL, the CT value of pulmonary artery in group B was higher than that in group A, and the difference was statistically significant. At the same time, the residual contrast agent in the superior vena cava of group A was less than that in group B, and the difference between the two groups was statistically significant(P<0.05). Conclusion With the same contrast medium dose of 40 mL, the TB technology yields higher quality of pulmonary artery angiography images and less superior vena cava artifacts compared with the BT technology, which is worthy of clinical promotion and application.