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DEVELOPMENT OF HIGH FREQUENCY ULTRASOUND USING SAPHIRE FIBERS AS WAVE GUIDE

采用蓝宝石光纤作为波导的高频超声波的研制

基本信息

批准号：
15206013
负责人：
MORIYA Tadashi
金额：
$ 17.31万
依托单位：
Tokyo Metropolitan University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A)
财政年份：
2003
资助国家：
日本
起止时间：
2003 至 2005
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-15206013/
关键词：
ACOUSTIC WAVEGUIDE SAPPHIREFIBER IVUS MICRO ULTRASONIC MOTOR HELICAL COIL AS A STATOR PULSE COMPRESSION METHOD 超音波モータ超音波伝送線路サファイアファイバー

项目摘要

(1) Transmission method of ultrasonic wave in the frequency range from few MHZ to 200 MHz using a sapphire fiber with diameters 100-200 microns was developed. The propagation loss in the fiber is extremely small. A conversion method from a transducer with a large diameter to the fiber was developed.(2) Preliminary results for the development of a biopsy-type microscopy were obtained. The sappire fiber was used as a waveguide to transmit the ultrasonic wave excited by the transducer placed outside the body to the tissue.(3) An ultrasonic motor using a helical coil as a stator was developed for IVUS(intravascular ultrasound). The structure of the motor is very simple. Therefore this motor may be used in medical engineering as well as industrial engineering.(4) Preliminary system for the IVUS was constructed and an image was obtained. The system incorporates the developed ultrasonic motor.(5) A method suppressing sidelobe level of the compressed pulse in pulse compression method in an intraductal ultrasonic imaging method was developed.

(1)研制了利用直径100-200微米的蓝宝石光纤传输频率在几MHZ到200 MHZ范围内的超声波的方法。光纤中的传播损耗极小。提出了一种从大直径换能器到光纤的转换方法。(2)获得了开发活检型显微镜的初步结果。蓝宝石纤维用作波导，将放置在体外的换能器激发的超声波传输到组织中。(3)研制了一种以螺旋线圈为定子的超声电机，用于血管内超声。电动机的结构很简单。因此，该电机不仅可用于工业工程，也可用于医学工程。(4)构建了IVUS的初步系统并获得了图像。该系统集成了研制的超声波电机。(5)提出了导管内超声成像方法中脉冲压缩法中压缩脉冲旁瓣电平的抑制方法。