便攜式超聲系統(tǒng)完整的信號(hào)路徑解決方案

　　醫(yī)學(xué)超聲是一種復(fù)雜的信號(hào)處理系統(tǒng)，其非侵入性使其具有廣泛的應(yīng)用前景。

　　有一個(gè)不斷增長(zhǎng)的需求，獲得的醫(yī)療服務(wù)。世界人口迅速增長(zhǎng)和老齡化，增加醫(yī)療成本。醫(yī)生需要小，高效節(jié)能，成本有效的診斷設(shè)備。便攜式診斷設(shè)備，具有成本效益的方式，將提高醫(yī)療質(zhì)量是非常可取的。

　　除了解決傳統(tǒng)成像在產(chǎn)科、婦科、放射學(xué)、心臟病學(xué)和血管應(yīng)用中的應(yīng)用外，便攜式超聲成像允許在護(hù)理點(diǎn)進(jìn)行部署。系統(tǒng)設(shè)計(jì)者發(fā)現(xiàn)，簡(jiǎn)單地將控制臺(tái)縮小到便攜式或手持設(shè)備并不能保證足夠的電池壽命或診斷圖像質(zhì)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.