Modulated or coded excitation signals can potentially improve the quality and increase the frame rate in medical ultrasound scanners the aim of this dissertation is to investigate systematically the applicability of modulated signals in medical ultrasound imaging and to suggest appropriate methods for coded imaging with the goal of making better anatomic and flow images and . Differences between detection and imaging nature of radar and ultrasound coded signals can be successfully used in medical imaging 2 3 experimental results reported in 4 show improvement of 15 20 db in snr as well as 30 40 mm improvement in penetration depth due to these superior properties coded excitation ce was successfully . Sidered fast ultrasound imaging using coded signals high frame rate coded imaging will be discussed in the third paper of this series 18 b paper structure the aim of this paper the first in a series of three pa pers is to investigate systematically the applicability of modulated signals in medical ultrasound imaging and to. Ultrasound imaging using coded excitation on transmit and selective filtering of fundamental and subharmonic signals on receive de1999637422 de69937422t2 en 1998 03 31 1999 03 26 ultrasonic imaging means of coded excitation on transmit and selective filtering at the receiving
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