Examination of rapid adjustment system based on screen score obtained using continuous shear wave elastography

IF 1.9 4区 医学 Q3 RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING
Marie Tabaru, Ren Koda, Hitoshi Shitara, Hirotaka Chikuda, Yoshiki Yamakoshi
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引用次数: 0

Abstract

Purpose

Continuous shear wave elastography (C-SWE) can be expected to be applied to portable muscle elasticity diagnosis. To establish diagnostic technology, it will be necessary to improve measurement techniques and quantitative measurement accuracy.

Methods

In this study, we investigated two screen scores: the quality index (Q-index), which determines whether the intensity of a power Doppler image is appropriate, and the shear wave propagation direction index (SWDI), which determines the uniformity of shear wave propagation.

Results

First, we performed numerical simulations with white noise and found that the coefficient of variation of shear wave velocity estimation was less than 5% when the normalized Q-index was greater than 0.27. Furthermore, regarding the SWDI, we clarified the relationship between the standard deviation in shear wave propagation direction and the SWDI. Next, the relationship between the Q-index and coefficient of variation of estimated shear wave velocity was evaluated through experiments using a tissue-mimicking phantom. The results showed that there was a negative correlation between the Q-index and the coefficient of variation, and the fluctuation of the propagation velocity could be inferred from the Q-index. Finally, we showed the results of applying the screen scores to muscle relaxation monitoring and confirmed its usefulness in clinical applications.

Conclusion

By applying the screen scores, we showed improved stability in speed estimation in C-SWE, and demonstrated the possibility of clinical applicability.

Abstract Image

根据连续剪切波弹性成像技术获得的筛分结果对快速调整系统进行检验
目的连续剪切波弹性成像(C-SWE)有望应用于便携式肌肉弹性诊断。方法在这项研究中,我们调查了两个筛选分数:质量指数(Q-index)和剪切波传播方向指数(SWDI),前者决定了功率多普勒图像的强度是否合适,后者决定了剪切波传播的均匀性。结果首先,我们用白噪声进行了数值模拟,发现当归一化 Q-index 大于 0.27 时,剪切波速度估计的变异系数小于 5%。此外,关于 SWDI,我们明确了剪切波传播方向的标准偏差与 SWDI 之间的关系。接下来,通过使用组织模拟模型进行实验,评估了 Q 指数与估计剪切波速度变异系数之间的关系。结果表明,Q 指数和变异系数之间呈负相关,并且可以从 Q 指数推断出传播速度的波动。最后,我们展示了将屏幕评分应用于肌肉松弛监测的结果,并证实了其在临床应用中的实用性。
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来源期刊
CiteScore
3.30
自引率
11.10%
发文量
102
审稿时长
>12 weeks
期刊介绍: The Journal of Medical Ultrasonics is the official journal of the Japan Society of Ultrasonics in Medicine. The main purpose of the journal is to provide forum for the publication of papers documenting recent advances and new developments in the entire field of ultrasound in medicine and biology, encompassing both the medical and the engineering aspects of the science.The journal welcomes original articles, review articles, images, and letters to the editor.The journal also provides state-of-the-art information such as announcements from the boards and the committees of the society.
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