IEEE transactions on ultrasonics, ferroelectrics, and frequency control
-
IEEE Trans Ultrason Ferroelectr Freq Control · Jun 2006
Novel transmit aperture for very large depth of focus in medical ultrasound B-scan.
Obtaining high quality ultrasound images at high frame rates has great medical importance, especially in applications in which tissue motion is significant (e.g., the beating heart). Dynamic focus and dynamic aperture can improve image quality significantly, and they have been implemented on the receive beam in state-of-the-art medical ultrasound systems. ⋯ Thus uniform sensitivity and uniform point spread function can be achieved over a very large depth without reducing the frame rate. Numerical simulations validate our theoretical analysis and demonstrate significant promises of the new technique.