Study on the Optimized Contrast Medium Injection Protocol of Test Bolus Technique in Pulmonary CT Angiography
LI Xin1, ZHANG Guo-dong1, LI Jian2
1. Department of Radiology, Northwest Nonferrous Hospital, Xi’an Shaanxi 710054, China; 2. Department of Radiology, Xijing Hospital, the Fourth Military Medical University, Xi’an Shaanxi 710032, China
Abstract：ObjectiveTo compare test bolus and bolus tracking for determination of scan delay of high-pitch dual-source CT pulmonary angiography in patients with the same number of contrast material. Methods One hundred patients with suspected pulmonary embolism were randomized into 2 groups: bolus tracking technique group (group A, n=50) and test bolus technique group (group B, n=50). Image quality of the pulmonary artery was assessed by two independent readers. The enhancement value of pulmonary artery was measured, radiation dose estimates were calculated. The imaging quality of the pulmonary artery and the radiation dose were compared with Mann-Whitney U and t test.ResultsThe average image quality score [(1.35±0.63) in group A and (1.21±0.47) in group B] showed no significant difference between group A and group B (U=-3.28, P=0.001). The CT attenuation values of pulmonary artery in group A were higher than that in group B, there was statistically significant difference between two groups. The residue of contrast agent within the superior vena cava in group B was less than that of group A, with statistically significant difference between two groups.ConclusionPulmonary angiography by using test bolus technology in dual-source CT high-pitch scan without another contrast agent can meet the requirement of the diagnosis.
李鑫1，张国栋1，李剑2. 小剂量测试技术在肺动脉CTA中对比剂注射优化方案的研究[J]. 中国医疗设备, 2017, 32(1): 71-74.
LI Xin1, ZHANG Guo-dong1, LI Jian2. Study on the Optimized Contrast Medium Injection Protocol of Test Bolus Technique in Pulmonary CT Angiography. China Medical Devices, 2017, 32(1): 71-74.
Yuan R,Shuman WP,Earls JP,et al.Reduced iodine load at CT pulmonary angiography with dual-energy monochromatic imaging:comparison with standard CT pulmonary angiography a prospective randomized trial[J].Radiology,2012,262(1):290-297.
Yuan R,Shuman WP,Earls JP,et al.Reduced iodine load at CT pulmonary angiography with dual-energy monochromatic imaging:comparison with standard CT pulmonary angiography a prospective randomized trial[J].Radiology,2012,262(1):290-297.
[2]
Godoy MC,Heller SL,Naidich DP,et al.Dual-energy MDCT: comparison of pulmonary artery enhancement on dedicated CT pulmonary angiography,routine and low contrast volume studies[J].Eur Radiol,2011,79(2):11-17.
[2]
Godoy MC,Heller SL,Naidich DP,et al.Dual-energy MDCT: comparison of pulmonary artery enhancement on dedicated CT pulmonary angiography,routine and low contrast volume studies[J].Eur Radiol,2011,79(2):11-17.
Yuan R,Shuman WP,Earls JP,et al.Reduced iodine load at CT pulmonary angiography with dual-energy monochromatic imaging:comparison with standard CT pulmonary angiography a prospective randomized trial[J].Radiology,2012,262(1):290-297.
[2]
Godoy MC,Heller SL,Naidich DP,et al.Dual-energy MDCT: comparison of pulmonary artery enhancement on dedicated CT pulmonary angiography,routine and low contrast volume studies[J].Eur Radiol,2011,79(2):11-17.
