Abstract：【Objective】To investigate the effect of low tube voltage combined with low concentration contrast agent on the imaging quality of head and neck CT angiography (CTA). 【Methods】The clinical data of 212 patients with head and neck CTA in our hospital were selected and divided into group A, group B, group C and group D according to random number table method, 53 cases in each group. Patients in the group A were given conventional tube voltage (120 kV), tube current (150 mAs) and contrast agent concentration (350 mg/ml of iodine). Patients in the group B were given tube voltage (120 kV), tube current (150 mAs) and contrast agent concentration (320 mg/ml of iodine). Patients in the group C were given tube voltage (100 kV), tube current (150 mAs) and contrast agent concentration (350 mg/ml of iodine). Patients in the group D were given tube voltage (100 kV), tube current (150 mAs) and contrast agent concentration (350 mg/ml of iodine). Tube current (150 mAs) and contrast medium concentration (320 mg/ml iodine). The image quality score, CT value of arterial segment, signal-to-noise ratio and radiation dose were compared among the four groups.【Results】There was no significant difference in image quality scores between group A, group B, group C and group D (Z=1.746,P=0.077>0.05). The CT values of aortic arch (AOAR), basilar artery (BA), left common carotid artery (CCA), right CCA, left internal carotid artery (ICA) and right ICA in the four groups were significantly different (P<0.05). The CT values of each artery segment in the group D were higher than those in the group A and the group B, lower than those the in group C (P<0.05). The signal-to-noise ratio of the group A and the group D was higher than that of the group B and the group C. The iodine intake of the group B and the group D was lower than that of the group A and the group C. The effective dose of the group C and the group D was lower than that of the group A and the group B. The difference was statistically significant (P<0.05).【Conclusion】Low tube voltage combined with low contrast agent concentration can effectively reduce radiation dose and iodine intake in patients undergoing head and neck CTA examination, and can ensure better image quality and meet the needs of clinical diagnosis.
杨蓓, 王翔, 张树桐, 谢元亮, 肖建伟, 夏文华. 低管电压结合低浓度造影剂对头颈CTA影像学图像质量的影响[J]. 医学临床研究, 2019, 36(3): 436-438.
YANG Bei, WANG Xiang, ZHANG Shu-tong,et al. Effect of Low Voltage and Low Contrast Agent Concentration on Imaging Quality of Head and Neck CTA. JOURNAL OF CLINICAL RESEARCH, 2019, 36(3): 436-438.
2019, Vol. 36 
