Lim Jaemyung
Department of Electrical Engineering in Hanyang University, Seoul, South Korea.
Biomed Eng Lett. 2022 May 12;12(3):219-228. doi: 10.1007/s13534-022-00228-w. eCollection 2022 Aug.
Trends of medical system move from a traditional in-person visit to virtual healthcare increases demands on point-of-care devices. Because ultrasound (US) is non-invasive, the demands highlight US imaging among other imaging modalities. Thanks to the development of US transducer technology, miniaturized US with application-specific integrated circuits (ASIC) have been researched. For example, applications that require small aperture sizes such as intravascular US (IVUS) and intra-cardiac echocardiography (ICE) require integration of system-on-a-chip (SoC) on the transducer. This paper reviews circuit techniques on the transmitter (TX) and receiver (RX) of the US imaging system. As TX circuits, pulser, T/RX switch, TX beamformer, and power management circuits are discussed. State-of-the-art transducer modeling, pre-amplifier, time-gain compensation, RX beamformer, quadrature sampler, and output driver are introduced as RX circuits.
医疗系统从传统的面对面就诊转向虚拟医疗的趋势增加了对床旁设备的需求。由于超声（US）是非侵入性的，这一需求使得超声成像在其他成像方式中备受关注。得益于超声换能器技术的发展，已对带有专用集成电路（ASIC）的小型化超声进行了研究。例如，血管内超声（IVUS）和心内超声心动图（ICE）等需要小孔径尺寸的应用，要求在换能器上集成片上系统（SoC）。本文综述了超声成像系统发射机（TX）和接收机（RX）的电路技术。作为TX电路，讨论了脉冲发生器、收发开关、TX波束形成器和电源管理电路。作为RX电路，介绍了最新的换能器建模、前置放大器、时间增益补偿、RX波束形成器、正交采样器和输出驱动器。
