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首页> 外文会议>Conference on Medical Imaging: Ultrasonic Imaging and Signal Processing >Coded Excitation with Sigma-Delta Sampling for Medical Ultrasound Imaging
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Coded Excitation with Sigma-Delta Sampling for Medical Ultrasound Imaging

机译：用Sigma-Delta采样进行编码激励，用于医疗超声成像

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摘要

We have developed a new coded excitation technique where sigma-delta sampling and the corresponding single-bit pre-compression are utilized to reduce hardware complexity while improving signal-to-noise ratio (SNR) and penetration. From phantom studies, we have obtained a 10.03 dB SNR improvement with the proposed sigma-delta sampling-based coded excitation (SDS-CE) system compared to the conventional pulse-echo excitation method at the same voltage level. This improvement allows the necessary voltage level for the SDS-CE to be lowered to one sixth (e.g., ±10 V) of that for the conventional pulse-echo excitation method with the excitation voltage of ±60 V to achieve a comparable SNR and penetration depth. To evaluate the hardware complexity in the proposed method, the number of gates was estimated based on the 0.35-μm CMOS fabrication process. The proposed SDS-CE method can save 55.4%, 79.0% and 56.8% gates needed compared to the conventional pulse-echo method and the coded excitation method based on pre and post-compression, respectively. The proposed SDS-CE could lead to the integration of the transmitter and receiver circuitries into a single chip due to the improved SNR and reduced hardware complexity.
机译：我们开发了一种新的编码激励技术，其中利用Sigma-Delta采样和相应的单位预压缩来减少硬件复杂性，同时提高信噪比（SNR）和穿透。从幻影研究中，我们通过在相同电压电平的传统脉冲回波激励方法相比，通过基于Sigma-Delta采样的编码激励（SDS-CE）系统获得了10.03 dB SNR改进。这种改进允许将SDS-CE的必要电压电平降至第六（例如，±10 V）的常规脉冲回波激励方法，其激励电压为±60V，以实现相当的SNR和穿透深度。为了评估所提出的方法中的硬件复杂性，基于0.35-μmCMOS制造过程估计栅极的数量。与传统的脉冲回波方法和基于前压缩和后压缩的编码激发方法相比，所提出的SDS-CE方法可以节省55.4％，79.0％和56.8％的栅极。所提出的SDS-CE由于改进的SNR和减少硬件复杂性，可以导致发射器和接收器电路的集成到单个芯片中。

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