A 1.2mW/channel 100m-Pitch-Matched Transceiver ASIC with Boxcar-Integration-Based RX Micro-Beamformer for High-Resolution 3D Ultrasound Imaging
P. Guo (TU Delft - Electronic Instrumentation)
Fabian Fool (TU Delft - ImPhys/Medical Imaging)
EC Noothout (TU Delft - ImPhys/Medical Imaging)
ZY Chang (TU Delft - Electronic Instrumentation)
Rik Vos (Erasmus MC, TU Delft - ImPhys/Medical Imaging)
Johan G. Bosch (Erasmus MC)
M.D. Verweij (Erasmus MC, TU Delft - ImPhys/Medical Imaging)
Nico de Jong (TU Delft - ImPhys/Medical Imaging, Erasmus MC)
M. A P Pertijs (TU Delft - Electronic Instrumentation)
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Abstract
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 (<150m) 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 (BF) 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 BF implementations employ per-element capacitive memory to realize the delay [1], [2], making it increasingly difficult to apply BF in smaller-pitch arrays.