心脏MRI检查中自由呼吸单次激发FIESTA序列的应用

发布时间：2018-02-26 14:44

本文关键词： 诊断技术心血管体层摄影术 X线计算机磁共振成像　出处：《放射学实践》2017年10期 　论文类型：期刊论文

【摘要】：目的:研究SS-SSFP序列在心脏MRI检查中从图像质量和扫描时间方面与IR-FGRE、3DIR-FGRE序列的优势。方法:本文搜集疑似或确诊心脏病患者52例进行心脏MRI检查,延迟期扫描采用SS-SSFP、IR-FGRE、3DIRFGRE序列。通过测量扫描时间和图像质量相关参数评价新序列与传统序列的差别。结果:SS-SSFP序列(24~36s)和3DIR-FGRE序列(27~35s)扫描时间明显低于IR-FGRE序列(116~154s),两者有统计学差异(P0.001)。统计学结果显示SS-SSFP序列图像质量、异常强化体积及百分比与IR-FGRE序列相比较无差异,而心肌信噪比、强化心肌与心肌对比信噪比有差异,SS-SSFP序列高于IR-FGRE序列(P0.001)。3DIR-FGRE序列的所有测量值均高于IR-FGRE序列,由于有更多的呼吸运动伪影,二者在图像质量方面有统计学差异(P0.001)。结论:SS-SSFP序列加快扫描时,由于其较高的信噪比、对比信噪比,且图像质量与IR-FGRE序列无统计学差异,SS-SSFP序列更适合患有严重心脏病和不能屏气的患者。
[Abstract]:Objective: to study the advantage of SS-SSFP sequence over IR-FGRE3DIR-FGRE sequence in cardiac MRI examination. Methods: 52 suspected or confirmed heart disease patients were examined with MRI. The SS-SSFPFGRE3DIRFGRE sequence was used to evaluate the difference between the new sequence and the traditional sequence by measuring the scanning time and image quality correlation parameters. Results the scanning time of the new sequence and the 3DIR-FGRE sequence were significantly lower than that of the IR-FGRE sequence (116154s / s) and 3DIR-FGRE (2436s) and 3DIR-FGRE (27s / 35s) respectively. Statistical results showed that SS-SSFP sequence image quality, There was no difference in volume and percentage of abnormal enhancement compared with IR-FGRE sequence, but there was significant difference in myocardial signal-to-noise ratio (SNR). SS-SSFP sequence was higher than IR-FGRE sequence (P 0.001). 3DIR-FGRE sequence was higher than IR-FGRE sequence. Because there are more respiratory motion artifacts, there is a statistical difference in image quality between them (P 0.001). Conclusion when the scan is speeded up by the SS-SSFP sequence, because of its high signal-to-noise ratio (SNR), the contrast signal-to-noise ratio (SNR) can be compared. There is no statistical difference between image quality and IR-FGRE sequence. SS-SSFP sequence is more suitable for patients with severe heart disease and can not hold breath.
【作者单位】：内蒙古国际蒙医医院影像中心;解放军总医院放射科;解放军273医院心血管内科;内蒙古医科大学附属医院放射科;
【基金】：2013年内蒙古卫生与计划生育委员医疗卫生科研项目(201302025)
【分类号】：R445.2;R541

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