CAJ | 학술논문

目的探讨使用大孔径3T磁共振、低剂量对比剂行下肢动脉磁共振血管成像( MRA)的可行性. 方法 MRA各血管段的病变程度由两名放射科医师分别评估. 数字剪影血管造影( DSA)评估由1 名医师完成. 通过Kappa值判断两名医师评估MRA血管狭窄程度的一致性,用Spearman 相关系数( Rs)判断MRA和DSA显示血管病变的相关性. 结果两名医师对病变血管狭窄程度的评估具有极佳的一致性. DSA与 MRA 图像评估结果具有明显的相关性( P <0. 05). 结论在大孔径3 T磁共振中,使用低剂量对比剂可进行高分辨率的下肢动脉MRA成像.
목적 탐토사용대공경3T자공진、저제량대비제행하지동맥자공진혈관성상( MRA)적가행성. 방법 MRA각혈관단적병변정도유량명방사과의사분별평고. 수자전영혈관조영( DSA)평고유1 명의사완성. 통과Kappa치판단량명의사평고MRA혈관협착정도적일치성,용Spearman 상관계수( Rs)판단MRA화DSA현시혈관병변적상관성. 결과 량명의사대병변혈관협착정도적평고구유겁가적일치성. DSA여 MRA 도상평고결과구유명현적상관성( P <0. 05). 결론 재대공경3 T자공진중,사용저제량대비제가진행고분변솔적하지동맥MRA성상.
Objective To investigate the feasibility with low dose contrast agent in patients undergoing peripheral magnetic resonance angiography with high spatial resolution at open-bore 3 T scanner. Methods Images of MRA were assessed separately by two radiologists. And the images of DSA were assessed by one radiologist. The degree of the two interobservers' consensus for detection of arterial stenosis was determined by calculating the Kappa coef-ficient. Spearman rank correlation coefficient was used for revealing the relationship between contrast-enhanced MR angiography and DSA,in terms of categories of stenosis. Results For the degree of vessel stenosis, Cohen' s statis-tics revealed excellent agreement between the two observers. There was a significant correlation between DSA and MRA(P<0. 05). Conclusion At this open-bore 3 T scanner, high spatial resolution peripheral magnetic reso-nance angiography is achieved with low dose contrast agent.