A 1.2mW/channel 100µm-Pitch-Matched Transceiver ASIC with Boxcar-Integration-Based RX Micro-Beamformer for High-Resolution 3D Ultrasound Imaging
A 1.2mW/channel 100µm-Pitch-Matched Transceiver ASIC with Boxcar-Integration-Based RX Micro-Beamformer for High-Resolution 3D Ultrasound Imaging
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具有基于 Boxcar 集成的 RX 微型波束形成器的 1.2mW/通道 100μm 节距匹配收发器 ASIC，用于高分辨率 3D 超声成像
DOI：
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发表时间：
2022
期刊：
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通讯作者：
M. Pertijs
中科院分区：
文献类型：
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作者：
P. Guo;F. Fool;Emile Noothout;Z. Chang;H. Vos;J. Bosch;M. Verweij;Nico de Jonq;M. Pertijs
近年来，2D超声换能器阵列和间距匹配ASIC的集成使得能够实现各种3D超声成像设备[1]-[3]。由于3D血管内超声检查、心内超声心动图和经<$门超声检查等应用需要小型化和提高空间分辨率，因此需要具有相应较小阵列间距（<150µm）的高频换能器（> 5 MHz）。这样的设备通常采用大量的换能器元件，要求ASIC中的通道计数减少，同时满足对每个元件功耗和管芯面积的严格限制。微波束形成（µBF）是通过对子阵列内接收到的回波信号执行延迟求和操作来减少通道数量的有效方法[1]。然而，以前的µBF实现采用每元件电容存储器来实现延迟[1]，[2]，使得在较小间距阵列中应用µBF变得越来越困难。
The integration of 2D ultrasonic transducer arrays and pitch-matched ASICs has enabled the realization of various 3D ultrasound imaging devices in recent years [1]–[3]. As applications such as 3D intravascular ultrasonography, intra-cardiac echocardiography, and trans-fontanelle ultrasonography call for miniaturization and improved spatial resolution, higher-frequency transducers (>5MHz) with a correspondingly smaller array pitch (<150µm) are needed. Such devices generally employ a large number of transducer elements, calling for channel-count reduction in the ASIC while meeting stringent restrictions on per-element power consumption and die area. Micro-beamforming (µBF) is an effective way of reducing channel count by performing a delay-and-sum operation on the echo signals received within a sub-array [1]. However, prior µBF implementations employ per-element capacitive memory to realize the delay [1], [2], making it increasingly difficult to apply µBF in smaller-pitch arrays.