| Budget Amount *help |
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2018: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2017: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2016: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Outline of Final Research Achievements |
We conducted a basic study for ultrasonic imaging method using high - and low-frequency ultrasound. In particular, parametric ultrasound with pulse compression was introduced for low-frequency ultrasound imaging. First, the pulse compression of chirp-modulated parametric ultrasound was realized. Next, the proposed method is applied to ultrasound imaging. The proposed method showed different images different from conventional high-frequency ultrasound images which did not separate neighboring objects and objects near a strong scattering object. In addition, the introduction of high-order M-sequence coding realized low-frequency ultrasound images with high peak to sidelobe ratio.
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