Development of a Low-Loss Ultrasonic Lens and Orthographic Visualization Equipment for Biomedical Use

在这个项目中，一种低损耗、相位连续的超声菲涅耳透镜与使用该透镜的正射可视化设备一起被开发出来，用于生物医学。与传统的超声诊断设备不同，它采用一次凝视正射观察器的形式，既不使用波束形成，也不使用正方向性合成，也不使用直线序列图像数据采集。最初的计划是制作具有每个像素传感器的焦平面成像板，每个像元传感器由接收电子设备支撑，但由于时间和费用的限制，该方案改为制作旋转的一维条纹阵列来获取焦平面图像的正弦图，然后采用CT重建算法手段。采用常规PZT材料制作了50个单元、间距0.5 mm、25×25 mm的一维条形阵列传感器，支持50路多普勒接收器阵列，并进行了模型信号验证试验，取得了成功。对FPA(焦平面阵列)的旋转支持和在真实环境中的真实数据测试，还有待于该项目的进一步扩展。

In this project a low-loss, phase-continuous ultrasonic Fresnel lens has been developed together with orthographic visualization equipment using the same, for biomedical use. Unlike conventional ultrasonic diagnostic equipment, it takes a form of one-gaze orthographic viewer, and does hire neither beam-forming, nordirectivity synthesis, norline-serial image data acquisition. Initial plan was to make focal-plane imaging plate having per-pixel sensor each by each supported by receiving electronics, however, due to tome and expense restriction the project was switched to make a rotating 1-D stripe array to acquire sinogram of focal plane image followed by CT reconstruction algorithm means. A 50 element, 0.5mm pitch, 25x25mm 1-D stripe array sensor with conventional PZT material, and supporting 50 channel Doppler receiver array, have been fabricated, tested, and model-signaling for validation test has been performed, with success. Rotary support for the FPA (focal plane array) and testing at real environment real data, are yet left for further extension of this project.