Preliminary study of a wireless pressure sensor system by ultrasonographic imaging of bubbles

• Project/Area Number: 15K12561
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Medical systems
• Research Institution: Tokyo Denki University
• Principal Investigator: KUWANA Kenta 東京電機大学, 工学部, 助教 (00593055)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Project Status: Completed (Fiscal Year 2017)
• Budget Amount: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000); Fiscal Year 2017: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2016: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2015: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
• Keywords: 圧力計測 / 気泡 / 超音波 / 超音波診断装置 / 圧力 / 圧力センサ

Outline of Final Research Achievements

In this study, we propose an estimation method of the environmental pressure by measuring the eigenfrequency of bubbles with an ultrasonic diagnostic equipment. The method is based on that the eigenfrequency changes depending on the external pressure. First, it was theoretically estimated how the eigenfrequency of the bubbles varies with the external pressure. After that, we confirmed the possibility that the external pressure can be obtained as Doppler shift of pulse wave Doppler in ultrasonic diagnostic equipment by using the ultrasonic contrast agent as a bubble.