CAJ | 학술논문

目的探讨CT反向扫描对消除慢阻肺(COPD)患者在CT扫描中呼吸运动伪影的价值. 方法随机抽取40例COPD志愿受检者,采用GR-Helical肺扫描技术进行顺向和反向扫描,所获得的图像由3名高年资影像诊断医师进行双盲质量评价. 结果 40例病例中,出现呼吸运动伪影17例,其中70.59%居下肺野,64.7%好发于60岁以上人群.顺向扫描伪影率为35%,经反向扫描伪影率降低到7.5%,下肺野未见明显伪影,图像质量提高了27.5%,2种扫描方法在统计学上具有显著性差异(P<0.05 ). 结论 CT反向扫描可有效抑制和消除下肺野呼吸运动伪影的发生,是慢阻肺患者的首选扫描技术.
목적 탐토CT반향소묘대소제만조폐(COPD)환자재CT소묘중호흡운동위영적개치. 방법 수궤추취40례COPD지원수검자,채용GR-Helical폐소묘기술진행순향화반향소묘,소획득적도상유3명고년자영상진단의사진행쌍맹질량평개. 결과 40례병례중,출현호흡운동위영17례,기중70.59%거하폐야,64.7%호발우60세이상인군.순향소묘위영솔위35%,경반향소묘위영솔강저도7.5%,하폐야미견명현위영,도상질량제고료27.5%,2충소묘방법재통계학상구유현저성차이(P<0.05 ). 결론 CT반향소묘가유효억제화소제하폐야호흡운동위영적발생,시만조폐환자적수선소묘기술.
Objective To study the value of reverse CT scan in eliminating the respiratory motion artifacts in the thoracic CT of the patients with chronic obstructive pulmonary diseases(COPD).Methods Fourty patients with COPD were randomly selected and underwent chest CT examinations with the technique of GR-Helical including directive and reverse CT scans.The images were blindly evaluated by three experienced doctors.Results In 40 cases,the respiratory motion artifacts were present in 17 cases,among them,70.59%(12/17) artifacts was in lower lung field,and 64.7%(11/17) artifacts occurred in the people over 60 years of age.The rate of artifact was 35% at directive scan,while it was reduced to 7.5% at reverse scan,the image quality was improved at 27.5%.There was statistical significance in eliminating respiratory motion artifacts between two scanning method (P＜0.05).Conclusion Reverse CT scanning can effectively eliminating or reducing the respiratory motion artifacts in lower lung field,it is the best choice of scanning mode in elderly patients with COPD.