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中华医学超声杂志(电子版) ›› 2022, Vol. 19 ›› Issue (07) : 623 -628. doi: 10.3877/cma.j.issn.1672-6448.2022.07.005

超声医学质量控制

心肌声学造影图像质量控制
李明奇1, 曹省1, 周燕翔1, 陈金玲1, 周青1,()   
  1. 1. 430060 武汉大学人民医院超声影像科;湖北省超声影像诊断与治疗质量控制中心
  • 收稿日期:2022-05-15 出版日期:2022-07-01
  • 通信作者: 周青
  • 基金资助:
    国家自然科学基金(81771849)

Quality control of myocardial contrast echocardiography

Mingqi Li1, Sheng Cao1, Yanxiang Zhou1, Jinling Chen1, Qing Zhou1,()   

  1. 1. Department of Ultrasonography, Renmin Hospital of Wuhan University, Ultrasound Imaging Diagnostic and Therapeutic Quality Control Center of Hubei Province, Wuhan 430060, China
  • Received:2022-05-15 Published:2022-07-01
  • Corresponding author: Qing Zhou
引用本文:

李明奇, 曹省, 周燕翔, 陈金玲, 周青. 心肌声学造影图像质量控制[J]. 中华医学超声杂志(电子版), 2022, 19(07): 623-628.

Mingqi Li, Sheng Cao, Yanxiang Zhou, Jinling Chen, Qing Zhou. Quality control of myocardial contrast echocardiography[J]. Chinese Journal of Medical Ultrasound (Electronic Edition), 2022, 19(07): 623-628.

目的

总结心肌声学造影(MCE)图像序列中存在的问题。

方法

回顾性分析武汉大学人民医院2021年6月至12月MCE图像序列,总计133例患者,心尖切面图像序列553个,心尖四腔心切面(A4C)181个,两腔心切面(A2C)181个,三腔心切面(A3C)191个。统计3个心尖切面图像序列中各种图像问题的发生率,采用χ2检验比较3切面图像质量问题发生率的差异。图像质量问题包括心腔内增强剂浓度过高、心腔内增强剂浓度过低、肋骨/肺遮挡、过度爆破、增益过高、增益过低。

结果

心腔内增强剂浓度过高、浓度过低、肋骨/肺遮挡、过度爆破、增益过高、增益过低的发生率分别为12.12%(67/553)、9.76%(54/553)、13.92%(77/553)、19.53%(108/553)、6.33%(35/553)、2.17%(12/553)。其中检查流程中最先采集的A4C中发生心腔内增强剂浓度过高的比例较其他切面高(A4C vs A2C vs A3C:18.23% vs 8.29% vs 9.95%,χ2=9.694,P=0.008),A2C发生心腔内增强剂浓度过低的比例最高,与其他切面比较差异无统计学意义(A4C vs A2C vs A3C:8.84% vs 12.71% vs 7.85%,χ2=2.746,P=0.253),A2C和A3C发生肋骨/肺遮挡声影的比例较A4C高(A4C vs A2C vs A3C:3.87% vs 19.89% vs 17.80%,χ2=23.043,P<0.001)。

结论

在MCE检查过程中,增强剂团注阶段采集的A4C图像易发生心腔内增强剂浓度过高。A2C和A3C易发生肋骨/肺遮挡。过度爆破占比较高,需加以重视。

Objective

To review and summarize the problems of myocardial contrast echocardiography (MCE) image sequences.

Methods

We retrospectively analyzed MCE image sequences of a total of 133 patients with 553 apical view images at Renmin Hospital of Wuhan University from June 2021 to December 2021, including 181 apical four-chamber view (A4C), 181 apical two-chamber view (A2C), and 191 apical three-chamber view (A3C) images. The incidence of various image problems in the three apical view image sequences was counted. The chi-square test was used for comparison of the incidence of image quality problems in the three apical view image sequences. The image problems were classified as: excessive and too low intracardiac contrast medium concentration, rib/lung occlusion, substandard flash, and too high and low gain.

Results

The incidences of excessive and too low intracardiac contrast medium concentration, rib/lung occlusion, substandard flash, and too high and low gain were 12.12% (67/553), 9.76% (54/553), 13.92% (77/553), 19.53% (108/553), 6.33% (35/553), and 2.17% (12/553), respectively. The incidence of excessive intracardiac contrast medium concentration was highest in the A4C sequence, which was first acquired during the examination (A4C vs A2C vs A3C: 18.23% vs 8.29% vs 9.95%, χ2=9.694, P=0.008); the incidence of too low intracardiac contrast medium concentration was lower in the A2C sequence compared to the A4C sequence, but the difference did not reach statistical significance (A4C vs A2C vs A3C: 8.84% vs 12.71% vs 7.85%, χ2=2.746, P=0.253); a higher proportion of rib/lung obscuring acoustic images occurred in the A2C and A3C sequences compared to the A4C sequence (A4C vs A2C vs A3C: 3.87% vs 19.89% vs 17.80%, χ2=23.043, P<0.001).

Conclusion

In MCE examination, A4C images captured during the bolus injection process are prone to excessive intracardiac contrast medium concentration, while A2C and A3C images are prone to rib/lung occlusion. Unqualified flash is in high percentage and should be avoided during examination.

图1 心肌声学造影图像质量问题。图a心腔增强剂浓度过高:图像近场微泡反射过多阻碍声波下传,远场心腔及基底段心肌声衰减。若心腔内增强剂浓度进一步升高,可出现图b中的情况:心腔及心肌中的微泡作为信号源反射过多发生信号溢出导致心肌轮廓模糊伴左心房声影。图c:心腔内增强剂浓度过低。图d:肋骨/肺遮挡声影
图2 过度爆破(上图)和合格的爆破(下图)对比。上图为过度爆破后第1、3、5、7、9帧图像,可见心腔内微泡被大量破坏,再充盈需要更多的时间;下图为合格的爆破示例,消除心肌内微泡的同时没有心腔微泡的过量破坏
图3 不同增益设置下的心肌声学造影(MCE)图像。图a、b为同一患者分别在增益设置73%和63%时采集的MCE图像,图a信号明显外溢,心肌模糊,但无左心房声影,图b图像质量佳;图c、d为同一患者分别在增益设置58%和64%时采集的MCE图像,图c心腔增强强度假性偏低,心肌广泛假性灌注缺损,图d图像质量佳
图4 同一患者在不同心腔增强剂浓度条件下的心肌声学造影图像。图a心腔内增强剂浓度适中,定性分析提示心尖帽与前侧壁心尖段心肌灌注减低。图b心腔内增强剂浓度过高,导致近场周边信号溢出至心尖帽、基底段心肌出现衰减伪像,定性分析易漏诊心尖帽与前侧壁心尖段灌注减低并误诊基底段心肌灌注减低
表1 心肌声学造影不同切面的图像质量问题比较[个(%)]
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