CAJ | 학술논문

目的比较高流量吸氧与正常呼吸状态下CT冠状动脉成像质量的差异，探讨高流量吸氧对CT冠状动脉成像质量的影响。资料与方法132例患者采用Philips 256 CT行CT冠状动脉成像，其中71例给予高流量吸氧，61例正常呼吸。采用AW 4.4工作站行后处理冠状动脉血管重建。比较两组前瞻性心电门控完成扫描比例及图像的信噪比、对比噪声比和冠状动脉各节段图像质量评分。结果给予高流量吸氧患者的前瞻性心电门控完成扫描比例及图像质量评分明显高于正常呼吸者（P<0.05），但两组图像信噪比及对比噪声比差异无统计学意义（P>0.05）。结论高流量吸氧可以在降低患者受辐射剂量的同时提高CT冠状动脉成像的质量，该方法简单易行，值得临床推广使用。
목적비교고류량흡양여정상호흡상태하CT관상동맥성상질량적차이，탐토고류량흡양대CT관상동맥성상질량적영향。자료여방법132례환자채용Philips 256 CT행CT관상동맥성상，기중71례급여고류량흡양，61례정상호흡。채용AW 4.4공작참행후처리관상동맥혈관중건。비교량조전첨성심전문공완성소묘비례급도상적신조비、대비조성비화관상동맥각절단도상질량평분。결과급여고류량흡양환자적전첨성심전문공완성소묘비례급도상질량평분명현고우정상호흡자（P<0.05），단량조도상신조비급대비조성비차이무통계학의의（P>0.05）。결론고류량흡양가이재강저환자수복사제량적동시제고CT관상동맥성상적질량，해방법간단역행，치득림상추엄사용。
Purpose To compare the difference of CT coronary artery imaging quality under highflow oxygen uptake and normal breathing, and to investigate the effect of high flow oxygen uptake on the quality of CT coronary artery imaging.Materials and Methods 132 patients underwent coronary CTA examination using 256-slice CT (Philips), among them 71 patients were supplied with highflow oxygen, and the other 61 were asked to breathe normally. Coronary arteries were post-processed and reconstructed on AW 4.4 workstation. Scanning completion rate, signal to noise ratio (SNR), contrast to noise ratios(CNR) and image quality score ofcoronary segment using these two prospective ECG-gating techniques were compared.Results The scanning completion rate and image quality score of the highflow oxygen uptake group were significantly superior to those of the normal breathing group (P<0.05). However, there was no statistically significant difference of SNR and CNR between the two groups (P>0.05).Conclusion Imaging quality of coronary CTA can be improved using highflow oxygen uptake with reduced patient radiation dose, thus worth being used clinically as a simple and practicable method.