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US 11,712,225 B2Granted
Stabilization of ultrasound images
AssigneeKoninklijke Philips N.V.
InventorsOudom Somphone, Cecile Dufour
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Abstract
The invention provides a method of stabilising an ultrasound image, the method comprising generating a composite image of a current image and at least one previous image. The composite image has a region of interest which is stabilised based on at least obtained stabilisation information. Use of a current image and at least one previous image allows a composite image of a larger size to be produced.
Claims16
An ultrasound imaging method for stabilizing a region of interest, the method comprising:
- receiving a sequence of ultrasound images, the sequence of ultrasound images comprising a current image and at least one previous image, wherein the current image has a current field of view and the at least one previous image has a previous field of view, the previous field of view being different from the current field of view;
- obtaining stabilization information for compensating motion of a region of interest in the sequence of ultrasound images, wherein the region of interest comprises less than an entirety of the current image and the at least one previous image;
- determining an overall field of view for a composite image to be generated using the current image and the at least one previous image, wherein the overall field of view comprises a union of the previous field of view and at least a portion of the current field of view, and wherein the overall field of view has predetermined dimensions larger than dimensions of the current image;
- based on the stabilization information and using the current image and the at least one previous image, generating the composite image having the overall field of view, wherein the region of interest is placed at a predetermined and fixed position within the composite image, by:
- determining pixel values for the composite image using pixel values of the current image, for portions of the current image that fall within the overall field of view of the composite image;
- discarding pixel values of the current image that fall outside the overall field of view of the composite image;
- and
- determining pixel values for the composite image using pixel values of the at least one previous image for portions of the composite image that do not overlap with the current image.
5 more elements
An ultrasound imaging system comprising:
- a non-transitory computer readable medium encoded with computer-readable program instructions;
- and
- at least one processor configured to execute the computer-readable program instructions, which when executed,
- receives a sequence of ultrasound images, the sequence of ultrasound images comprising a current image and at least one previous image, wherein the current image has a current field of view and the at least one previous image has a previous field of view, the previous field of view being different from the current field of view;
- obtains stabilization information for compensating motion of a region of interest in the sequence of ultrasound images, wherein the region of interest comprises less than an entirety of the current image and the at least one previous image;
- determines an overall field of view for a composite image to be generated using the current image and the at least one previous image, wherein the overall field of view comprises a union of the previous field of view and at least a portion of the current field of view, and wherein the overall field of view has predetermined dimensions larger than dimensions of the current image;
- based on the stabilization information and using the current image and the at least one previous image, generates the composite image having the overall field of view, wherein the region of interest is placed at a predetermined and fixed position within the composite image;
- determines pixel values for the composite image using pixel values of the current image, for portions of the current image that fall within the overall field of view of the composite image;
- discards pixel values of the current image that fall outside the overall field of view of the composite image;
- and
- determines pixel values for the composite image using pixel values of the at least one previous image for portions of the composite image that do not overlap with the current image.
8 more elements
Dependencies are inferred from the claim text.