Pulse Inversion Sequences For Nonlinear Imaging
AssigneeStichting Voor de Technische Wetenschappen of Van Vollenhovenlaan
InventorsMartijn Frijlink, David Goertz, Antonius Wilhelmus van der Steen
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Abstract
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.
Claims55
A method for ultrasound imaging of a patient's body, comprising:
- transmitting ultrasound excitation pulses of alternating polarity into the patient's body;
- receiving ultrasound echo signals in response to the excitation signals;
- and
- applying a weighting scheme to the received ultrasound echo signals, wherein the weighting scheme is given by
- ∑
- t
- =
- 1
- n
-
-
- a
- ·
- P
- t
- +
- /
- -
- +
- b
- ·
- P
- t
- +
- 1
- -
- /
- +
- +
- c
- ·
- P
- t
- +
- 2
- +
- /
- -
- where t is an index of summation incremented by 1, P+/− and P−/+ are echo signals in response to excitation pulses of opposite polarities, n is an upper bound of summation, and a, b, and c are weighting coefficients.
A method for ultrasound imaging within a patient's body, comprising:
- transmitting ultrasound excitation pulses of alternating polarity into the patient's body;
- receiving ultrasound echo signals in response to the excitation signals;
- and
- applying a weighting scheme to the received ultrasound echo signals, wherein the weighting scheme is given by
- ∑
- t
- =
- 1
- n
-
-
- a
- ·
- P
- t
- +
- /
- -
- +
- b
- ·
- P
- t
- +
- 1
- -
- /
- +
- +
- c
- ·
- P
- t
- +
- 2
- +
- /
- -
- where t is an index of summation incremented by 2, P+/− and P−/+ are echo signals in response to excitation pulses of opposite polarities, n is an upper bound of summation, and a, b, and c are weighting coefficients.
Dependencies are inferred from the claim text.