국가연구개발성과
논문 (학술지)
A 35 MHz/105 MHz Dual-Element Focused Transducer for Intravascular Ultrasound Tissue Imaging Using the Third Harmonic
| 등록번호 | RPMS-2019-0190744668 | SCI 구분
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※구분 : SCI(SCIE포함), 비SCI |
SCI |
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| 저자명 (주·공동저자) | Lee Junsu ; 문주영; 장진호 ※ 과제 참여정보와 일치하는 연구자 상세정보로 정확하지 않을 수 있습니다. 동일저자 논문보기 |
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| 논문구분 | 국외전문학술지 | 학술지명 | SENSORS |
| ISSN | 1424-8220 | 학술지 출판일자 | 2018-07-15 |
| 학술지 볼륨번호 | 18 | 논문페이지 | 0 ~ 0 |
| 학술지 임팩트팩터 | 0.0 | 기여율 | 50 % |
| DOI | 10.3390/s18072290 | ||
| 초록 | The superharmonic imaging of tissue has the potential for high spatial and contrast resolutions, compared to the fundamental and second harmonic imaging. For this technique, the spectral bandwidth of an ultrasound transducer is divided for transmission of ultrasound and reception of its superharmonics (i.e., higher than the second harmonic). Due to the spectral division for the transmission and reception, transmitted ultrasound energy is not sufficient to induce superharmonics in media without using contrast agents, and it is difficult that a transducer has a ？？6 dB fractional bandwidth of higher than 100%. For the superharmonic imaging of tissue, thus, multi-frequency array transducers are the best choice if available; transmit and receive elements are separate and have different center frequencies. However, the construction of a multi-frequency transducer for intravascular ultrasound (IVUS) imaging is particularly demanding because of its small size of less than 1 mm. Here, we report a recently developed dual-element focused IVUS transducer for the third harmonic imaging of tissue, which consists of a 35-MHz element for ultrasound transmission and a 105-MHz element for third harmonic reception. For high quality third harmonic imaging, both elements were fabricated to have the same focus at 2.5 mm. The results of tissue mimicking phantom tests demonstrated that the third harmonic images produced by the developed transducer had higher spatial resolution and deeper imaging depth than the fundamental images | ||
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