Fetal Breathing Movement Monitoring System using Ultrasonic Doppler effect.

利用超声波多普勒效应的胎儿呼吸运动监测系统。

• 批准号: 05650377
• 负责人: YAMAKOSHI Yoshiki
• 金额: $ 1.34万
• 依托单位: Gunma University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1993
• 资助国家: 日本
• 起止时间: 1993 至 1994
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-05650377/
• 关键词: Fetal monitoring,; Ultrasonic pulsed Doppler,; Internal displacement measurement,; Adaptive detection technique,; Fetal breathing movement,; Fetal well being; 胎児モニタリンク; 胎児のwoll being; 胎児診断; 超音波; ドップラー効果; 呼吸様運動; 胎動計測

It is important to monitor the fetal movements quantitatively with high precision for evaluation of fetal well-being. Since conventional methods are designed for monitoring the fetal heart rate, these methods are not satisfactory for general fetal well-being monitoring. In this research, we developed a new method which can monitor the fetal breathing movements by using both ultrasonic pulsed Doppler technique and internal small displacement measurement method. In the method, the ultrasonic pulses are transmitted successively to the fetus and the reflecting waves are detected. The small displacement of the fetal tissue is measured from small change of the ultrasonic wave phase. The special features of the method are as follows ; 1) small displacement of fetal diaphragm is monitored with high precision, 2) only the fetal signal is extracted from complex signals of fetus and mother, 3) higher safety to the fetus because of lower ultrasonic output power. We constructed a new monitoring system based on these research results. This system can monitor internal small displacement at ten different points which are separated by 15 mm each. This system is evaluated at Faculty of Medicine, Tokyo University and Tukiji Obstetrics and Gynecology Hospital and more than several ten sample records are obtained. We expect that this kind of the method will be a valuable monitoring means for quantitative fetal monitoring in near future.

高精度定量监测胎动对于评估胎儿健康状况非常重要。由于传统方法是为监测胎儿心率而设计的，因此这些方法对于一般胎儿健康监测来说并不能令人满意。在这项研究中，我们开发了一种利用超声脉冲多普勒技术和内部小位移测量方法来监测胎儿呼吸运动的新方法。在该方法中，将超声波脉冲连续发射到胎儿并检测反射波。通过超声波相位的微小变化来测量胎儿组织的微小位移。该方法的特点如下： 1）高精度监测胎儿膈肌的小位移，2）从胎儿和母亲的复杂信号中仅提取胎儿信号，3）超声波输出功率较低，对胎儿的安全性更高。我们根据这些研究成果构建了一个新的监控系统。该系统可以监测十个不同点的内部小位移，每个点相距15毫米。该系统在东京大学医学院和土喜地妇产科医院进行了评估，并获得了十多个样本记录。我们期望这种方法在不久的将来将成为定量胎儿监测的一种有价值的监测手段。

项目成果

Y.Yamakoshi, and H.Sato: "Precision estimation of fetal heart rate estimation from internal displacement measurement, (in Japanese)" Japanese J.of Ultrasonic Medicine and Biology. 21. 28-32 (1994)

Y.Yamakoshi 和 H.Sato：“通过内部位移测量精确估计胎儿心率，（日语）”日本超声医学和生物学杂志。

篠塚憲男,山越芳樹他: "パルスドプラ法による組織の微小変位計測法を用いた胎児呼吸様運動の実時間計測システムの開発" 日本産科婦人科学会雑誌. 46. 13-20 (1994)

Norio Shinozuka、Yoshiki Yamakoshi 等人：“使用脉冲多普勒微组织测量开发胎儿呼吸样运动的实时测量系统”日本妇产科学会杂志 46. 13-20 (1994)。 ）

山越芳樹: "時間-空間領域での2次元フーリエ変換を用いた超音波及モード画像からの移動ベクトル推定法" 超音波医学. 22. 114-123 (1994)

Yoshiki Yamakoshi：“时空域中使用二维傅里叶变换的超声和模态图像的运动矢量估计方法”超声医学。22. 114-123 (1994)

N.Shinozuka,Y.Yamakoshi: "New method for tracking fetal broathing movements using real‐time prlsed Doppler disphcoment moasnterment" J.of Ultrasound in Medicine. 13. 19-25 (1994)

N. Shinozuka，Y. Yamakoshi：“使用实时多普勒呼吸运动跟踪胎儿呼吸运动的新方法”J. of Ultrasound in Medicine 13. 19-25 (1994)。

小林浩一,岡丸崇 山越芳樹: "加振映像法によるin vitro および in vivoにおける振動 伝搬速度に関する検討" 超音波医学. 22. 495-500 (1994)

Koichi Kobayashi、Takashi Okamaru、Yoshiki Yamakoshi：“使用激发成像方法研究体外和体内振动传播速度”超声医学 22. 495-500 (1994)。