Methods and systems for ultrasound imaging of a body in motion
AssigneePolyvalor, Limited Partnership
InventorsPhilippe Cormier, Jonathan Poree, Jean Provost
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Abstract
There is provided a method and a system for ultrasound imaging in presence of relative motion between a body and an imaging probe. A plurality of Eulerian-based ultrasound images of the body acquired at successive times T with the imaging probe is obtained. Lagrangian coordinates for the body are computed using data from the Eulerian-based ultrasound images. Lagrangian-based ultrasound images of the body are formed by providing the data from the Eulerian-based ultrasound images in the Lagrangian coordinate system.
Claims20
A method for ultrasound imaging in presence of relative motion between a biological body and an imaging probe, the method comprising:
- obtaining a plurality of Eulerian-based ultrasound images of the biological body acquired with the imaging probe at successive times T during an entire cycle of natural movement of the biological body;
- computing Lagrangian coordinates for the biological body using data from the Eulerian-based ultrasound images, the Lagrangian coordinates accounting for motion of the biological body over time during the entire cycle of natural movement of the biological body, wherein computing the Lagrangian coordinates for the biological body comprises:
- determining Doppler velocities from the Eulerian-based ultrasound images, comprising regularizing the Doppler velocities in time and space by solving a spatial minimization problem and a temporal minimization problem;
- and
- converting the Doppler velocities into the Lagrangian coordinates;
- forming, using a Lagrangian beamformer, Lagrangian-based ultrasound images of the biological body in the Lagrangian coordinates by providing the data from the Eulerian-based ultrasound images in the Lagrangian coordinate system, the Lagrangian beamformer configured to provide correction for the motion during the entire cycle of natural movement of the biological body;
- and
- filtering the Lagrangian-based ultrasound images to locate, throughout the entire cycle of natural movement of the biological body, positions of microbubbles injected into a blood stream.
A system for ultrasound imaging in presence of relative motion between a biological body and an imaging probe, the system comprising:
- a processor;
- and
- a non-transitory computer-readable medium having stored thereon program code executable by the processor for:
- obtaining a plurality of Eulerian-based ultrasound images of the biological body acquired with the imaging probe at successive times T during an entire cycle of natural movement of the biological body;
- computing Lagrangian coordinates for the biological body using data from the Eulerian-based ultrasound images, the Lagrangian coordinates accounting for motion of the biological body over time during the entire cycle of natural movement of the biological body, wherein computing the Lagrangian coordinates for the biological body comprises:
- determining Doppler velocities from the Eulerian-based ultrasound images, comprising regularizing the Doppler velocities in time and space by solving a spatial minimization problem and a temporal minimization problem;
- and
- converting the Doppler velocities into the Lagrangian coordinates;
- forming, using a Lagrangian beamformer, Lagrangian-based ultrasound images of the biological body in the Lagrangian coordinates by providing the data from the Eulerian-based ultrasound images in the Lagrangian coordinate system, the Lagrangian beamformer configured to provide correction for the motion during the entire cycle of natural movement of the biological body;
- and
- filtering the Lagrangian-based ultrasound images to locate, throughout the entire cycle of natural movement of the biological body, positions of microbubbles injected into a blood stream.
Dependencies are inferred from the claim text.