Systems, devices, and methods for tracking and compensating for patient motion during a medical imaging scan
First Claim
1. A motion tracking system for tracking and compensating for motion of a patient during a medical imaging scan, the motion tracking system comprising:
- an optical marker configured to be attached to a patient;
one or more optical detectors, wherein each of the one or more optical detectors is positioned to view the optical marker along a different line of sight;
one or more compute readable storage devices configured to store a plurality of computer executable instructions; and
one or more hardware computer processors in communication with the one or more computer readable storage devices and configured to execute the plurality of computer executable instructions in order cause the motion tracking system to;
receive a digital image from each of the one or more optical detectors;
determine, for each digital image, whether the digital image includes a view of the optical marker;
for each digital image that includes a view of the optical marker, determine a position of the optical marker in the digital image as viewed by the one or more optical detectors;
calculate a plurality of baseline attributes related to the optical marker based at least in part on the position of the optical marker in the digital image as viewed by the one or more optical detectors; and
estimate iteratively a three-dimensional pose of the patient, until a measure of error is within a threshold amount, the measure of error calculated based on the plurality of baseline attributes as compared to a plurality of comparison attributes.
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Accused Products
Abstract
A motion tracking system for dynamic tracking of and compensation for motion of a patient during a magnetic resonance scan comprises a first camera positioned to view an optical marker along a first line of sight; a second camera positioned to view the optical marker along a second line of sight; and a computer system configured to analyze images generated by the first and second cameras to determine changes in position of the optical marker, and to generate tracking data for use by a magnetic resonance scanner to dynamically adjust scans to compensate for the changes in position of the optical marker, wherein the computer system is configured to dynamically adapt its image analysis to utilize images from all cameras that are currently viewing the optical marker.
777 Citations
20 Claims
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1. A motion tracking system for tracking and compensating for motion of a patient during a medical imaging scan, the motion tracking system comprising:
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an optical marker configured to be attached to a patient; one or more optical detectors, wherein each of the one or more optical detectors is positioned to view the optical marker along a different line of sight; one or more compute readable storage devices configured to store a plurality of computer executable instructions; and one or more hardware computer processors in communication with the one or more computer readable storage devices and configured to execute the plurality of computer executable instructions in order cause the motion tracking system to; receive a digital image from each of the one or more optical detectors; determine, for each digital image, whether the digital image includes a view of the optical marker; for each digital image that includes a view of the optical marker, determine a position of the optical marker in the digital image as viewed by the one or more optical detectors; calculate a plurality of baseline attributes related to the optical marker based at least in part on the position of the optical marker in the digital image as viewed by the one or more optical detectors; and estimate iteratively a three-dimensional pose of the patient, until a measure of error is within a threshold amount, the measure of error calculated based on the plurality of baseline attributes as compared to a plurality of comparison attributes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A motion tracking system for dynamic tracking of and compensation for motion of a patient during a medical imaging scan, the motion tracking system comprising:
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an optical marker configured to be attached to a patient being scanned, wherein the optical marker comprises an optically visible pattern, wherein the optically visible pattern is rotationally asymmetrical about an axis normal to a plane of the optically visible pattern; a first optical detector; a second optical detector; a computer system configured to analyze images generated by the first and second optical detectors to determine changes in position of the optical marker, and to generate tracking data for use by a medical imaging scanner to dynamically adjust scans to compensate for the changes in position of the optical marker, wherein the computer system is configured to dynamically determine whether one or more of the first optical detector or the second optical detector is currently viewing the optical marker, wherein the computer system is configured to dynamically adapt its image analysis to utilize images from all optical detectors that are currently viewing the optical marker, wherein the dynamically adapting its image analysis comprises estimating iteratively a three-dimensional pose of the patient until a measure of error is within a threshold amount, and wherein the computer system comprises a computer processor and an electronic storage medium; and the medical imaging scanner, wherein the medical imaging scanner is configured to dynamically adjust scans to compensate for the changes in position of the optical marker based on the tracking data. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification