Research and Development of System for Continuous Measurement of Transient Response of Arterial Wall to Administration of Nitroglycerine

连续测量动脉壁对硝酸甘油给药的瞬态反应系统的研制

• 批准号: 12555113
• 负责人: KANAI Hiroshi
• 金额: $ 8.06万
• 依托单位: Tohoku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-12555113/
• 关键词: Arteriosclerosis; Medical Ultrasound; Elasticity of Arterial Wall; Phased tracking method; Noninvasive Measurement; Tissue Characterization; Nitroglycerine; Carotid artery; 弾性特性; アテローム; バイオレオロジー

We previously developed a new method, the phased tracking method, for accurately tracking the movement of the heart wall and arterial wall based on both the phase and magnitude of the demodulated ultrasonic signals to determine the instantaneous position of an object. With this method, the local change in wall thickness during one heartbeat can be determined. We have now developed a real-time system for continuously measuring the change in thickness of the arterial wall. In this system, four high-speed digital signal processing chips are employed for realizing the initially developed method in real time. The tracking results for both sides of the wall are superimposed on the M (motion)-mode image. The change in thickness of the arterial wall as small as several micrometers can be successfully detected in real time with good reproducibility. The elasticity of the arterial wall is derived from the blood pressure. In in vivo experiments, the rapid response of the change in wall thickness of the carotid artery to the administration of nitroglycerine (NTG) is evaluated for a young healthy subject and a young smoker. When the change in thickness is plotted against the simultaneously measured pressure, such curves also change due to the administration of NTG. This is shown every 35 seconds after the administration. This new real-time system offers potential for quantitative diagnosis of early-stage arteriosclerosis by evaluation of the rapid response of the cardiovascular system to NTG.

我们以前开发了一种新方法，即分阶段跟踪方法，用于根据解调的超声信号的相位和幅度准确跟踪心脏壁和动脉壁的运动，以确定对象的瞬时位置。通过这种方法，可以确定一个心跳期间壁厚的局部变化。现在，我们已经开发了一个实时系统，用于连续测量动脉壁的厚度变化。在该系统中，采用了四个高速数字信号处理芯片实时实现最初开发的方法。墙两侧的跟踪结果叠加在M（运动）模式图像上。可以成功检测到具有良好可重复性的动脉壁厚度的变化，并且可以成功检测到几微米。动脉壁的弹性源自血压。在体内实验中，评估了颈动脉壁厚厚度对硝酸甘油（NTG）的施用的快速反应，以评估年轻的健康受试者和年轻的吸烟者。当厚度的变化在同时测量的压力上绘制时，由于施用了NTG，此类曲线也会发生变化。这是在管理后每35秒显示的。这种新的实时系统通过评估心血管系统对NTG的快速反应来定量诊断早期动脉硬化。

项目成果

渡辺 優, 長谷川英之, 金井 浩: "3次元音場の模擬による動脈壁厚変化計測の精度検討"日本音響学会誌. 58. 696-703 (2002)

Yu Watanabe、Hideyuki Hasekawa、Hiroshi Kanai：“通过模拟三维声场来检查测量动脉壁厚度变化的准确性”日本声学学会杂志 58. 696-703 (2002)。

M. Watanabe: "Investigation on accuracy in measurement of small change in arterial wall thickness by computer simulation of ultrasonic field in 3-D space"Journal of Acoustic Society of Japan. 58. 696-703 (2002)

M. Watanabe：“通过 3D 空间中超声场的计算机模拟测量动脉壁厚度微小变化的精度研究”日本声学学会杂志。

金井 浩, 他70名: "『臨床検査』臨時増刊号『超音波検査の技術と臨床』"医学書院. 335 (2001)

Hiroshi Kanai 等 70 人：《临床检查》特刊《超声检查技术与临床实践》Igaku Shoin 335 (2001)。

Y. Koiwa: "Systolic Heterogeneity of Transmural Myocardial Function in Normal Subjects: Physiological Function Heterogeneity"Tohoku J. Exp. Med. 197. 183-187 (2002)

Y. Koiwa：“正常受试者透壁心肌功能的收缩异质性：生理功能异质性”Tohoku J. Exp。

Y.Koiwa, H.Kanai他5名: "Systolic Heterogeneity of Transmural Myocardial Function in Normal Subjects : Physiological Function Heterogeneity"Tohoku J. Exp. Med. 197. 183-187 (2002)

Y. Koiwa、H. Kanai 等 5 人：“正常受试者跨壁心肌功能的收缩异质性：生理功能异质性”Tohoku J. Exp Med 197. 183-187 (2002)