便携式超声系统完整的信号路径解决方案

　　便携式超声系统完整的信号路径解决方案

　　医学超声是一种复杂的信号处理系统，其非侵入性使其具有广泛的应用前景。

　　有一个不断增长的需求，获得的医疗服务。世界人口迅速增长和老龄化，增加医疗成本。医生需要小，高效节能，成本有效的诊断设备。便携式诊断设备，具有成本效益的方式，将提高医疗质量是非常可取的。

　　除了解决传统成像在产科、妇科、放射学、心脏病学和血管应用中的应用外，便携式超声成像允许在护理点进行部署。系统设计者发现，简单地将控制台缩小到便携式或手持设备并不能保证足够的电池寿命或诊断图像质量。

　　Beamforming technique

　　Innovations in system architecture， coupled with analog and mixed signal electronics， FPGA-based algorithms and control， or CPU and GPU-based image processing enable compact systems with high diagnostic relevance. Ultrasound systems use focal imaging techniques to achieve performance far beyond what can be achieved through a single-channel approach. Using an array of transmitters and receivers， a high-definition image can be built by time shifting， scaling， coherently summing echo energy， and phasing as seen in the phased array ultrasound system in Figure 1. The concept of shifting， phasing， and scaling of transmit and receive signals， generally from the same reciprocal transducer array， is known as beamforming. It provides the ability to form an image by dynamically focusing and concentrating energy sequentially in points of the scan region.