A 35 MHz/105 MHz Dual-Element Focused Transducer for Intravascular Ultrasound Tissue Imaging Using the Third Harmonic.
A 35 MHz/105 MHz Dual-Element Focused Transducer for Intravascular Ultrasound Tissue Imaging Using the Third Harmonic.
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使用第三个谐波的35 MHz/105 MHz双元素聚焦换能器用于血管内超声组织成像。
DOI：
10.3390/s18072290
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发表时间：
2018-07-15
期刊：
影响因子：
--
通讯作者：
Chang JH
中科院分区：
文献类型：
--
作者：
Lee J;Moon JY;Chang JH
与基频和二次谐波成像相比，组织的超谐波成像具有高空间和对比度分辨率的潜力。对于这种技术，超声波换能器的频谱带宽被划分为超声波的传输和超谐波（即高于二次谐波）的接收。由于传输和接收的频谱划分，在不使用造影剂的情况下，传输的超声能量不足以在介质中诱导超谐波，并且换能器很难具有高于100%的- 6 dB分数带宽。因此，对于组织的超谐波成像，如果可用，多频阵列换能器是最佳选择；发射和接收元件是分开的，具有不同的中心频率。然而，用于血管内超声（IVUS）成像的多频率换能器的构造特别苛刻，因为它的尺寸小于1毫米。在这里，我们报告了一种最近开发的双元件聚焦IVUS换能器，用于组织的三谐波成像，它由一个35 mhz的超声传输元件和一个105 mhz的三谐波接收元件组成。为了获得高质量的三次谐波成像，两个元件被制造成在2.5 mm处具有相同的焦点。组织模拟实验结果表明，该传感器产生的三次谐波图像比基波图像具有更高的空间分辨率和更深的成像深度。
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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DOI：
10.1109/tuffc.2011.2085
发表时间：
2011-11
期刊：
IEEE transactions on ultrasonics, ferroelectrics, and frequency control
影响因子：
--
作者：
Li X;Wu W;Chung Y;Shih WY;Shih WH;Zhou Q;Shung KK
通讯作者：
Shung KK
DOI：
10.4244/eijv4i5a105
发表时间：
2009-03
期刊：
EuroIntervention : journal of EuroPCR in collaboration with the Working Group on Interventional Cardiology of the European Society of Cardiology
影响因子：
--
作者：
Low AF;Kawase Y;Chan YH;Tearney GJ;Bouma BE;Jang IK
通讯作者：
Jang IK
影响因子：
14
作者：
Staub, Daniel;Schinkel, Arend F. L.;Feinstein, Steven B.
通讯作者：
Feinstein, Steven B.
DOI：
10.1109/tuffc.2015.007288
发表时间：
2015-11-01
影响因子：
3.6
作者：
Cha, Jung Hyui;Kang, Byungwoo;Chang, Jin Ho
通讯作者：
Chang, Jin Ho
DOI：
10.3390/s141120825
发表时间：
2014-11-04
期刊：
Sensors (Basel, Switzerland)
影响因子：
--
作者：
Martin KH;Lindsey BD;Ma J;Lee M;Li S;Foster FS;Jiang X;Dayton PA
通讯作者：
Dayton PA