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11 March 2005 Increasing the depth of focus in medical ultrasound B-scan
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Proceedings Volume 5674, Computational Imaging III; (2005)
Event: Electronic Imaging 2005, 2005, San Jose, California, United States
Obtaining hight quality ultrasound images at high frame rates has great medical importance, especially in applications where tissue motion is significant (e.g. the beating heart). Dynamic focusing and dynamic apodization can improve image quality significantly, and they have been implemented on the receive beam in state-of-the-art medical ultrasound systems. However implementing dynamic focusing and dynamic apodization on the transmit beam compromises frame rate. We present a novel transmit apodization scheme where a continuum of focal points can be obtained in one transmission, and uniform sensitivity and uniform point spread function can be achieved over very large range without reducing frame rate. Preliminary simulations demonstrate significant promises of the new technique.
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Yibin Zheng and Seth D. Silverstein "Increasing the depth of focus in medical ultrasound B-scan", Proc. SPIE 5674, Computational Imaging III, (11 March 2005);

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