双源CT冠状动脉造影图像质量因素及相应措施
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Image quality factors and corresponding measures of dual-source CT coronary angiography
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    目的:探讨影响双源CT冠状动脉造影成像质量的因素,并提出相应措施以提高图像质量-方法:随机抽取2009年1月~2011年1月南京医科大学附属无锡市人民医院进行双源CT冠状动脉造影的300例患者的图像作为对照组,提出质量评价标准,按优到差评估分为Ⅰ~Ⅳ级,并对造成冠脉成像质量下降的影响因素进行分析;抽取2011年2月~8月通过改良措施后进行检查的300例患者的图像作为改良组进行质量对比-结果:两组图像质量分级,对照组:Ⅰ级:232例(77.3%);Ⅱ级:48例(16.0%);Ⅲ级:16例(5.3%);Ⅳ级:4例(1.3%);影响因素依次为:冠脉严重钙化-呼吸伪影-严重心律失常伪影-上腔静脉及右房高密度造影剂产生的伪影-监测层面触发点选择不当-重建时相选择不当-改良组:Ⅰ级:263例(87.7%);Ⅱ级:26例(8.7%);Ⅲ级:10例(3.3%);Ⅳ级:1例(0.3%)-两组图像质量差异有统计学意义(P < 0.01)-结论:优化CT扫描参数,准确分析冠状动脉成像伪影的成因,并提出相应措施,对提高冠脉成像质量具有重要的意义-

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    Objective: To investigate factors of dual-source CT coronary angiography image quality and suggest measures to improve the image quality. Methods: Total 300 patients through dual-source CT coronary angiography were randomly selected as control group from January 2009 to January 2011,and were divided into Ⅰto Ⅳ from priority to poor compared with similar studies according to quality of evaluation criteria,then factors of dual-source CT coronary angiography image quality were analyzed. Meanwhile,300 patients through improved measures were randomly selected as modified group from February 2011 to August 2011. Results: The image quality in control group were grade Ⅰ:232 cases(77.3%);grade Ⅱ:48 cases(16.0%);grade Ⅲ:16 cases (5.3%);grade Ⅳ:4 cases(1.3%);the factors of dual-source CT coronary angiography image quality were severe coronary artery calcification,respiratory artifacts,severe arrhythmia artifacts,superior vena cava,right atrium,high-density contrast agent produced artifacts,inappropriate choice of monitoring the level of the trigger points and inappropriate choice of phase reconstruction. The image quality in modified group were grade Ⅰ:263 cases (87.7%);grade Ⅱ:26 patients (8.7%);grade Ⅲ:10 cases (3.3%);grade Ⅳ:1 (0.3%). Image quality grading differences between the two groups were statistically significant(P < 0.01). Conclusion: Optimizing CT scan parameters and proposing appropriate measures,had important significance to improve the quality of coronary imaging.

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华妙强,方向明,王 凯,陈 寅,丁国良.双源CT冠状动脉造影图像质量因素及相应措施[J].南京医科大学学报(自然科学版),2011,(9):1344-1347

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  • 收稿日期:2011-04-20
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