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Subject: Multi-line beamforming med.appl. The second effort toward improved temporal resolution was to prove more meaningful. Parallel receive beam processing appeared commercially in the form of multi-line beam formation. Improvements in processing power now made it possible to insonify a broad areaencompassing several scanlines, then to receive and form beams at multiple scanline locations simultaneously. Instead of obtaining four scanlines with four transmit-receive cycles, the four scanlines could be obtained in response to a single transmit event (Figure 3). The time to scan a full image field and hence the frame rate of display improved by a factor of four in this example. But higher levels of multi-line requires the broadening of the transmit beam to insonify the greater expanse of multiple scanline locations. The transmit beam was even less focused than in the past, leading to the development of image artifacts. However, even with artifacts, multi-line beam formation was an important step in improving frame rate. multi-line beam formation - многоканальное формирование луча? многострочное? http://www.healthcare.philips.com/pwc_hc/main/shared/Assets/Documents/Ultrasound/Products/452296295791_VoyagerWhitePaper_LR.pdf стр. 2 Спасибо! |
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использование нескольких ультразвуковых лучей для формирования изображения... http://www.newscenter.philips.com/ru_ru/standard/news/press/2013/20130904-philips-epiq.wpd#.Uu0XyMJWGdM |
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