Space-Time Compressed Sampling Techniques for Integrated Ultrasound Imaging System-on-a-Chip

项目摘要 便携式和可穿戴超声成像系统的快速增长的需求要求紧凑，节能， 超声前端电子设备的高效集成。片上数据的减少和数字化至关重要 方面，以弥合高性能成像要求和严格限制之间的差距， 功率、物理尺寸和互连。模拟微波波束形成和时域波束形成的经典方法 多路复用遭受丢失原始RF数据或低帧速率的不期望的折衷，从而禁止它们的使用 对于许多重要的新兴成像模态，例如高帧速率平面波成像和相关， 例如剪切波弹性成像。这项建议旨在探索一种新的方法， 超声电子集成，允许访问具有可管理数字数据的预波束形成RF数据 速率和不折不扣的成像速度，通过研究压缩感知（CS）的应用， 集成电路级的超声成像。PI和Co-I建议开发一种新的CS框架， 执行全通道RF数据压缩的空间和时间压缩，以及模拟到 数字转换，能够同时减少数据量、采样率和电路占用空间。一 CS数字超声SoC原型，包含片上ADC和数据链路，完全兼容潜在的 将设计、实施基于导管的简化电缆成像，并将其与传统的 成像系统。这项探索性研究计划的长期目标是为下一步奠定基础。 第二代医学超声成像集成前端电路，为医学超声成像提供了重要的理论、模型 电路技术，以及新兴的便携式和可穿戴系统的设计空间和限制。

PROJECT SUMMARY The rapidly growing needs of portable and wearable ultrasound imaging systems call for compact, energy- efficient integration of ultrasound front-end electronics. On-chip data reduction and digitization are crucial aspects to bridge the gap between the high-performance imaging requirements and the stringent constraints in power, physical size and interconnects. The classic methods of analog micro-beamforming and time-domain multiplexing suffer from undesirable trade-offs of losing raw RF data or low frame rate, prohibiting their usage for many important emerging imaging modalities such as high frame rate plane wave imaging and correlation- based modalities such as shear wave elastography. This proposal seeks to explore a new approach for efficient ultrasound electronics integration that allows access to pre-beamformed RF data with manageable digital data rates and uncompromised imaging speed, through studying the application of compressed sensing (CS) to ultrasound imaging at the integrated circuit level. The PI and Co-I propose to develop a novel CS framework that performs spatial and temporal compression of full channel RF data compression together with the analog-to- digital conversion, enabling concurrent reduction on the data volume, sampling rate, and circuit footprint. A prototype CS digital ultrasound SoC containing on-chip ADCs and data links and fully compatible with potentially catheter-based reduced cable imaging will be designed, implemented, and benchmarked against conventional imaging systems. The long-term goal of this exploratory research program is to lay the foundations for next generation integrated front-end circuits for medical ultrasound imaging, providing the important theories, models, circuit techniques, as well as the design space and limitations for emerging portable and wearable systems.