Abstract

目的 探讨3 T MR呼吸导航回波触发的全心冠状动脉MR成像(WH-CMRA)技术对冠状动脉的显示能力和图像质量.方法 92名志愿者接受了3 T MR呼吸导航回波触发的WH-CMRA检查,使用T2预备的快速梯度回波(TFE)序列采集.按目测法将图像质量分为0~Ⅳ级,并结合冠状动脉各主要分支的长度、直径和血管锐利度进行评判.分析呼吸、心率和导航回波的采集效率对成像质量的影响,评价呼吸导航回波触发WH-CMRA对冠状动脉主要分支的显示效果.结果 92名受检者的图像质量评价为Ⅳ级28名,Ⅲ级53名,Ⅱ级9名,Ⅰ级2名,扫描成功率为88%(81/92).心率≤75次/min,图像质量20名为Ⅳ级,锐利度为(48±11)%;心率>75次/min,图像质量34名为Ⅲ级,锐利度为(33±15)%,心率的快慢和图像质量呈负相关(r=-0.726,P<0.05).呼吸模式和图像质量无明显相关性(r=0.215,P>0.05).结论 3 T WH-CMRA技术可以实现自由呼吸下的全心冠状动脉成像,但图像质量受到心率的限制。

Full Text
Paper version not known

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call

Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.