| Budget Amount *help |
¥16,510,000 (Direct Cost: ¥12,700,000、Indirect Cost: ¥3,810,000)
Fiscal Year 2022: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2021: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2020: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2019: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2018: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
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| Outline of Final Research Achievements |
Photoacoustic (PA) imaging is an imaging technology to utilize ultrasonic signals generated through PA effect of blood or tissues with a pulsed illumination of light. This study was started with developments of evaluation method of contrast agents for PA imaging. Utilizing cost-effective semiconductor lasers, two methods based on the different setup were developed. One was composed of a modulated light and a resonant air tube, the other was a combination of a pulsed light and a thin glass tube with inner diameter of less than 1 mm. The optimum pulse duration was found for the given inner diameter of the glass tube to efficiently utilize the acoustic resonances. It was found that the PA signals from the thin tube exhibited the directivity specific to the related acoustic mode. In addition, characteristics of PA signal for a thin silicone tube were studied.
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