2015 Fiscal Year Final Research Report
in vivo bone assessment based on measurement of ultrasonic propagation speed by airborne ultrasound
| Project/Area Number |
25750184
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Medical systems
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| Research Institution | Tokyo Institute of Technology |
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Principal Investigator |
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Keywords | 空中超音波 / 生体内音波伝搬 / 非接触骨評価 / M系列パルス圧縮 |
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| Outline of Final Research Achievements |
Quantitative ultrasound, measurement and evaluation of ultrasonic propagation speed or attenuation characteristics, is one of the diagnosis methods of osteoporosis. In this research, non-contact measurement of the propagation speed in a heel using airborne ultrasound which passed through the heel has been studied. The passed-through ultrasound is extremely attenuated due to a large reflection from surfaces between air and the heel. Therefore, pulse compression using an M-sequence, which is one of the binary pseudo-random sequences, is employed for improvement of the signal-to-noise ratio of the passed-through ultrasound. Furthermore, ultrasonic transducers are inclined with considering the surface inflections by scanning of the shape of the heel. In in vivo experiment, then, passed-through ultrasound, whose attenuation are from 80 to 90 dB, can be detected by the proposed method.
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| Free Research Field |
複合領域
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