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首页> 外文期刊>Ultrasound in Medicine and Biology >Confounding effects of myocardial background intensity and attenuation in contrast echocardiography: an in vivo study.
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Confounding effects of myocardial background intensity and attenuation in contrast echocardiography: an in vivo study.

机译:对比超声心动图对心肌背景强度和衰减的混杂影响:一项体内研究。

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摘要

It has been shown in vitro that the time-intensity data of echo contrast agents may be influenced by the background intensity of the myocardium and attenuation at high contrast agent concentrations. In the present study, these effects are evaluated from in vivo data. An effect of background intensity of the myocardium on the determination of the transit rate of the contrast agent could not be demonstrated unambiguously. A statistically significant relation between transit rate and background intensity was found only for intermediate flows in the transmural region. The magnitude of this relation was such that it does not provide a serious source of error. Attenuation and shadowing typically underestimate the transit rate of the contrast agent, which results in overestimation of flow. It is recommended that the lowest doses of contrast agent inducing myocardial opacification should be applied.
机译:体外显示回声造影剂的时间强度数据可能受心肌背景强度和高造影剂浓度下衰减的影响。在本研究中,从体内数据评估了这些作用。不能清楚地证明心肌背景强度对造影剂传输速率的确定的影响。仅在透壁区域中的中间水流中,发现了水流速度与背景强度之间的统计学显着关系。这种关系的严重性使得它不会提供严重的误差源。衰减和阴影通常会低估造影剂的传输速率,从而导致流量过高。建议应用最低剂量的诱导心肌浑浊的造影剂。

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