A 256 x 256 2-D array transducer with row-column addressing for 3-D rectilinear imaging.
A 256 x 256 2-D array transducer with row-column addressing for 3-D rectilinear imaging.
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DOI：
10.1109/tuffc.2009.1107
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发表时间：
2009-04
期刊：
影响因子：
--
通讯作者：
Yen JT
中科院分区：
文献类型：
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作者：
Seo CH;Yen JT
本文给出了一个5 MHz、256 × 256二维（65，536个单元、38.4 mm × 38.4 mm）、行-列寻址的二维阵列换能器的仿真和实验结果。这种设计的主要优点是减少了互连的数量，修改后的发射/接收切换方案与一个简单的二极管电路，并能够执行体积成像的目标附近的换能器与发射波束形成的方位角和接收波束形成的仰角。传感器的最终尺寸为38.4 mm × 38.4 mm × 300 μm。在对行列换能器进行原型制作后，在5.4 MHz下的串联谐振阻抗为104 Ω。测得的-6 dB分数带宽为53%，中心频率为5.3 MHz。在发射焦点处的SNR被测量为30 dB。在5 MHz时，平均最近邻串扰为-25 dB。在本文中，我们提出了3-D图像的5对尼龙线嵌入在一个明确的明胶体模和一个直径为8毫米的圆柱形无回声囊肿体模从一个256 × 256二维阵列换能器由1-3的组合。我们显示方位角和仰角B扫描以及C扫描。在方位角B扫描中可以看到导线的横截面，而在仰角B扫描和C扫描中可以看到长轴。轴向间距为1 mm的导丝对在正视B扫描中可辨别，而所有导丝对在短轴B扫描中可辨别。使用来自导线靶体模的单根导线，与0.55 mm的模拟波束宽度相比，在发射波束形成和接收波束形成中，在30 mm深度处测得的横向波束宽度分别为0.68 mm和0.70 mm。囊肿的横截面在方位B扫描中可见，而长轴在仰角B扫描和C扫描中可见为矩形。
We present simulation and experimental results from a 5 MHz, 256 × 256 2-D (65,536 elements, 38.4 mm × 38.4 mm) 2-D array transducer with row-column addressing. The main benefits of this design are a reduced number of interconnects, a modified transmit/receive switching scheme with a simple diode circuit, and an ability to perform volumetric imaging of targets near the transducer with transmit beamforming in azimuth and receive beamforming in elevation. The final dimensions of a transducer were 38.4 mm × 38.4 mm × 300 μm. After prototyping a row-column transducer, the series resonance impedance was 104 Ω at 5.4 MHz. The measured -6 dB fractional bandwidth was 53% with a center frequency of 5.3 MHz. The SNR at the transmit focus was measured to be 30 dB. At 5 MHz, the average nearest neighbor crosstalk was -25 dB. In this paper, we present 3-D images of 5 pairs of nylon wires embedded in a clear gelatin phantom and of an 8 mm diameter cylindrical anechoic cyst phantom acquired from a 256 × 256 2-D array transducer made from a 1–3 composite. We display the azimuth and elevation B-scans as well as the C-scan. The cross-section of the wires is visible in the azimuth B-scan while the long axes can be seen in the elevation B-scan and C-scans. The pair of wires with 1 mm axial separation is discernible in the elevational B-scan while all the pairs of wires were distinguishable in the short-axis B-scan. Using a single wire from the wire target phantom, the measured lateral beamwidth was 0.68 mm and 0.70 mm at 30 mm depth in transmit beamforming and receive beamforming respectively compared to the simulated beamwidth of 0.55 mm. The cross-section of the cyst is visible in the azimuth B-scan while the long axes can be seen in the elevation B-scan and C-scans as a rectangle.