Time domain NMR (TD-NMR) has been widely used on the analysis of liquids or liquid components in heterogeneous materials such as food, biological tissues, synthetic and bio polymers, oil-bearing rocks, biomasses and cement-based materials. The use of TD-NMR for studying solid and soft mater has been growing in number and variety of applications, mostly for organic systems where the detection of ¹H signals is highly advantageous. However, the strong ¹H–¹H dipolar interactions in solids make the ¹H FID to decay in the same order of the dead time of most commercially available NMR probe heads. Thus, solid echoes are often used for recovering signals from solid components. In this article we reinvestigate the time-reversal solid-echo pulse sequence proposed by Rhim and Kessemeier, seeking for optimal pulse power and timing conditions that maximize its efficiency on recovering ¹H signals from rigid segments. We show that under these optimized conditions, which we denote as Rhim and Kessemeier - Radiofrequency Optimized Solid-Echo (RK-ROSE), the experiment can be more efficient than its most popular counterparts Solid-Echo (SE) and mixed-Magic Sandwich Echoes (mixed-MSE). Our results also suggest that, despite the finite pulse power, with current probe technology the RK-ROSE experiment is potentially able to provide an accurate estimation of rigid components, without relying on an external calibration using multiple standard samples, as usually done in SFC analysis of the FID signal. At last, we demonstrate that RK-ROSE can be adapted as a simple filter to supress signals from mobile segments in heterogeneous materials.

时域NMR（TD-NMR）已广泛用于分析非均质材料中的液体或液体成分，例如食物，生物组织，合成和生物聚合物，含油岩石，生物质和水泥基材料。TD-NMR在研究固体和软质材料方面的用途已经越来越广泛，尤其是对于¹ H信号检测非常有利的有机系统。但是，固体中强的¹ H– ¹ H偶极相互作用使¹H FID以大多数市售NMR探头的死区时间的相同顺序衰减。因此，固体回声通常用于从固体成分中恢复信号。在本文中，我们对Rhim和Kessemeier提出的时间可逆固体回波脉冲序列进行了重新研究，以寻求最佳脉冲功率和定时条件，以最大程度地提高其恢复^1的效率。来自刚性段的H信号。我们表明，在这些优化条件下，我们将其称为Rhim和Kessemeier-射频优化固体回波（RK-ROSE），该实验可能比最流行的同类方法固体回声（SE）和混合魔术三明治回波更有效（混合MSE）。我们的结果还表明，尽管脉冲功率有限，但使用电流探针技术，RK-ROSE实验有可能能够准确地估计刚性部件，而无需像使用SFC分析那样通常使用多个标准样品进行外部校准。 FID信号的 最后，我们证明了RK-ROSE可以作为简单的滤波器来抑制异质材料中来自移动部分的信号。