运动相位纠正技术与节段法相位技术在磁共振心肌延迟增强中的对比研究

发布时间：2018-02-04 21:19

  本文关键词： 磁共振成像 延迟增强 心肌强化　出处：《中国循环杂志》2017年09期 　论文类型：期刊论文

【摘要】：目的 :对比运动矫正相位敏感反转恢复序列(PSIR SSFP MOCO)与快速扰相梯度回波相位敏感反转恢复序列(PSIR segmented)在磁共振心肌延迟增强中的优势。方法 :回顾56例同时采用PSIR segmented(PSIR segmented组)和PSIR SSFP MOCO(PSIR SSFP MOCO组)两种扫描方式行磁共振心肌延迟增强扫描的患者的影像资料,对比分析两组图像的主观质量评分(4级),并配对对比分析两组中正常心肌、异常强化心肌及左心室腔内图像的信噪比和相对信噪比。结果 :PSIR segmented组图像质量主观评分结果:4分、3分、2分和1分组依次占28.6%、41.1%、28.6%和1.8%。PSIR SSFP MOCO组图像质量主观评分为4分的比例为96.4%,显著高于PSIR segmented组(P0.001),3分占3.6%,1分或2分均为0%。PSIR SSFP MOCO组图像正常心肌信噪比(4.70±3.47 vs 3.64±3.2,P=0.074)、异常心肌信噪比(52.58±36.58 vs 27.65±18.47,P0.001)及左心室血池的信噪比(40.52±33.97 vs 23.14±11.46,P0.001)均高于PSIR segmented组。PSIR SSFP MOCO组图像异常强化心肌与正常心肌的相对信噪比(47.46±33.97 vs 23.75±16.68,P0.001)、异常强化心肌与左心室血池的相对信噪比(8.53±17.77 vs 4.54±10.10,P=0.181)及左心室血池与正常心肌的相对信噪比(35.82±25.72 vs 19.49±9.44,P0.001)也均显著高于PSIR segmented组。结论 :与PSIR segmented序列相比,采用PSIR SSFP MOCO序列能够获得更高比例的高质量心肌增强延迟图像。
[Abstract]:Objective: to compare the PSIR SSFP moco sequence with the fast phase gradient echo phase sensitive inversion recovery sequence (PSIR SSFP moco). The advantage of PSIR segmented in Mr myocardial delayed enhancement methods: 56 cases were treated with PSIR segmented (PSIR segmented) at the same time. PSIR segmented group and PSIR SSFP MOCO(PSIR SSFP MOCO group). Imaging data of patients with delayed Mr myocardial enhancement in two different ways. The subjective quality scores of the two groups were compared and compared with the normal myocardium in the two groups. Results the subjective score of image quality in the segmented group was 4 points and 3 points. 2 points and 1 group accounted for 28.6% and 1.8k.PSIR SSFP MOCO group respectively accounted for 41.6% and 1.8% respectively. The proportion of subjective score of image quality in PSIR SSFP MOCO group was 96.4%. It was significantly higher than that of PSIR segmented group (P 0.001), with a score of 3 (3.6%). The signal-to-noise ratio (SNR) of normal myocardium in PSIR SSFP MOCO group was 4.70 卤3.47 vs 3.64 卤3.2p0. 074). Abnormal myocardial signal-to-noise ratio (SNR) was 52.58 卤36.58 vs 27.65 卤18.47. The signal-to-noise ratio (SNR) of left ventricular blood pool was 40.52 卤33.97 vs 23.14 卤11.46. P0.001) was higher than that in PSIR segmented group. PSIR SSFP MOCO group. The relative signal-to-noise ratio (SNR) of abnormal enhanced myocardium and normal myocardium was higher than that of PSIR segmented group. 47.46 卤33.97 vs 23.75 卤16.68. The relative signal-to-noise ratio (SNR) of abnormal enhanced myocardium and left ventricular blood pool was 8.53 卤17.77 vs 4.54 卤10.10. The relative signal-to-noise ratio (SNR) of left ventricular blood pool to normal myocardium was 35.82 卤25.72 vs 19.49 卤9.44. P0.001) was significantly higher than that in PSIR segmented group. Conclusion: compared with PSIR segmented sequence. A higher proportion of high quality delayed myocardial enhancement images can be obtained by using PSIR SSFP MOCO sequence.
【作者单位】： 中国医学科学院北京协和医学院国家心血管病中心阜外医院磁共振影像科;空军总医院磁共振科;
【基金】：首都临床特色临床应用研究基金(Z151100004015141) 国家自然科学基金(81571647) 北京自然科学基金(7152124)
【分类号】：R445.2;R542.2
【正文快照】： 磁共振成像(MR)对比剂延迟强化(LGE)是一扫描前需进行呼吸训练。患者采用仰卧位,将种检测缺血性和非缺血性心肌病心肌坏死、心肌纤相控阵线圈置于患者前胸,胸前导联心电门控技术,维化的无创、高效且分辨率高的影像技术[1,2],广外加呼吸门控。于对比剂(0.2 mmol/kg)注射5~10泛，

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