增加阵列传感器带宽和信鼻比（SNR）是生成高质量医学超声图像的一个关键

增加阵列传感器带宽和信鼻比（SNR）是生成精确医学超声图像的一个关键问题。而，与发射和接收电路的电气转换分数，由于产生高灵敏度，体积小而体积小，灵敏度往往较差。多层陶瓷（MLC）的实现是降低谐振的有效方法，具有提高超声波探头SNR的潜力。在此工作中，我们制造了多层微米陶瓷，其比率为0.1Pb（Ni1 / 3Nb2 / 3）O3-0.35Pb（Zn1 / 3Nb2 / 3）O3-0.15Pb（Mg1 / 3Nb2 / 3）O 3-0.1PbZrO3-0.3PbTiO3-4mol％多余的NIO（PNN-PZN-PN-PZ-PT），通过卷筒卷磁带铸造工艺，并在低温950°C下与90Ag / 10Pd电极共同燃烧。利用获得的5层MLC（5L-MLC），我们设计并演示了超声波和光声成像的5 MHz 32 5层传感器元件在-6 dB下表现出87％的带宽，远高于单层陶瓷（SLC）元件的62％。体积，在外部阻抗为50Ω的SLC元件上，插入损耗提高了16.2 dB。实验结果和理论分析表明，通常由PNN-PZN-PN-PZ-PZ-PT多层陶瓷制造的阵列传感器在获得超声波和光声图像方面很有希望。超声<br>扫描仪工作在发射或接收

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Increasing the bandwidth and signal to nose ratio (SNR) of array sensors is a key problem in generating high-quality medical ultrasound images. However, compared with the electrical impedance of transmitting and receiving circuits, the sensitivity of small array elements is often poor due to its much higher impedance. The realization of MLC is an effective method to reduce the impedance and has the potential to improve the SNR of ultrasonic probe. In this work, we have fabricated multilayer piezoelectric ceramics with the composition of 0.1pb (Ni1 / 3Nb2 / 3) o3-0.35pb (Zn1 / 3Nb2 / 3) o3-0.15pb (MG1 / 3Nb2 / 3) O 3-0.1pbzro3-0.3pbtio3-4mol% excess NiO (pnn-pzn-pn-pz-pt), which was cast by rolling magnetic tape and burned with 90ag / 10pd electrode at 950 ° C. Using the obtained 5-layer MLC (5l-mlc), we designed and demonstrated a 5 MHz 32 element array sensor for ultrasonic and photoacoustic imaging. The 5-layer sensor exhibits 87% bandwidth at - 6 dB, which is much higher than 62% of SLC. In addition, the insertion loss is increased by 16.2 dB on the SLC with an external impedance of 50 Ω. The experimental results and theoretical analysis show that the array sensors made of pnn-pzn-pn-pz-pz-pt multilayer ceramics are promising in obtaining high-quality ultrasonic and photoacoustic images.<br>Ultrasound scanners work in transmitting or receiving<br>