Pulse inversion sequences for nonlinear imaging

Details Pulse inversion sequences for nonlinear imaging Pulse inversion sequences for nonlinear imaging

A - Human Necessities

61

B

A61B 8/12 (2006.01) G01S 15/89 (2006.01)

Patent

CA 2659645

Provided herein are Pulse-Inversion (PI) sequences that provide for fundamental frequency suppression in nonlinear imaging applications. In an embodiment, a weighting scheme is applied to the received echo pulses resulting from transmit pulses of alternating polarity to reduce the effect of transducer motion. In an embodiment, a three-pulse weighting scheme is applied to a PI sequence. In other embodiments, different combinations of the three-pulse weighting scheme are applied to a PI sequence.

L'invention concerne des séquences d'inversion d'impulsion (PI) qui fournissent une suppression de fréquence fondamentale dans des applications d'imagerie non linéaires. Dans un mode de réalisation, un schéma de pondération est appliqué aux impulsions d'écho reçues résultant d'impulsions de transmission ou d'une polarité qui varie pour réduire l'effet d'un déplacement de transducteur. Dans un mode de réalisation, un schéma de pondération à trois impulsions est appliqué à une séquence PI. Dans d'autres modes de réalisation, différentes combinaisons du schéma de pondération à trois impulsions sont appliquées à une séquence PI.

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