To Investigate the Application of Low-dose Contrast Agent Combined with Low Monitoring Threshold in CTA of the Head and Neck
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摘要: 目的：探讨Philips Brilliance iCT低剂量对比剂联合低监测阈值在头颈部CTA中的应用。资料与方法：选取我院需行头颈部CTA的患者60例，随机分为A组（观察组）、B组（实验组）。分别行不同的注射扫描方案：A组对比剂60 mL，生理盐水40 m L，监测阈值150 HU；B组对比剂40 mL，生理盐水40 mL，监测阈值90 HU；两组注射速率均以5.0 mL/s，均监测主动脉弓。分别对两组图像进行主观评价（目测法）和客观评价（分别测量上腔静脉、主动脉弓、左右颈总动脉、基底动脉及左右大脑中动脉的CT值）来进行图像质量分析。结果：①主观评价A、B两组图像均能满足诊断要求，B组明显减少上腔静脉对比剂残留；②A、B两组图像质量等级评分无统计学意义（P> 0.05）；③A、B两组各部位测量的CT值比较均有统计学意义（P <0.05）。结论：Philips Brilliance iCT在头颈部CTA检查中采用40 m L对比剂配合主动脉弓90 HU的监测阈值的方法，虽然图像CT值比较有差异，但图像质量完全能够满足临床诊断要求。且在保证图像质量的前提下，降低了对比剂用量，减少了上腔静脉对比剂的残留，降低了过敏反应的发生及对比剂对肾功能的损伤。Abstract: Objective: To investigate the application of Philips Brilliance ICT with low-dose contrast agent combined with low monitoring threshold in CTA of the head and neck.Materials and Methods: Sixty patients requiring CTA of the head and neck in our hospital were selected and randomly divided into group A(observation group) and group B(experimental group), which received different injections and scanning scheme, respectively.A(observation group) contrast agent 60 mL, saline 40 mL, Monitoring Threshold 150 HU;B(experimental group) contrast agent 40 mL, saline 40 mL, Monitoring Threshold 90 HU;injection rate of both groups were 5.0 mL/s, monitoring the aortic arch.The images in the 2 groups were subjectively evaluated(visual observation) and objectively evaluated(the measurement of CT values of the superior vena cava, aortic arch, left and right common carotid artery, left and right middle cerebral artery), respectively, for the analysis of the quality of images.Results: (1) The subjective evaluation showed that all images in group A and group B could meet the diagnostic requirements.In group B, the contrast agent residue in the superior vena cava reduced significantly.(2) The scores of images quality in group A and group B presented no statistical significance(P>0.05).3.Comparison of the CT values of the superior vena cava, aortic arch, left and right common carotid artery, left and right middle cerebral artery between group A and group B showed statistical significance(P<0.05).Conclusion: Although the application of Philips Brilliance ICT with 40 ml of contrast agent combined with monitoring threshold of 90 HU in CTA of the head and neck shows differences in CT values of the images, the quality of the images can fully meet the clinical diagnostic requirements.In addition, with the quality of images ensured, the contrast agent dose and contrast agent residue in the superior vena cava are reduced.
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Keywords:
- tomography /
- X-ray computed /
- head and neck CTA /
- threshold /
- low dose
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期刊类型引用(12)
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