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Systems, devices, and methods for tracking and compensating for patient motion during a medical imaging scan

A medical imaging and patient technology, applied in medical science, surgical navigation systems, applications, etc., can solve problems such as affecting diseased tissue, harming healthy tissue, and patient motion tracking does not have high accuracy.

Inactive Publication Date: 2017-05-24
KINETICOR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in many of these systems, patient motion is not tracked with high precision
Therefore, the use of these systems may result in the application of radiation therapy to non-target tissue areas, thereby inadvertently harming healthy tissue while intentionally affecting diseased tissue

Method used

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  • Systems, devices, and methods for tracking and compensating for patient motion during a medical imaging scan
  • Systems, devices, and methods for tracking and compensating for patient motion during a medical imaging scan
  • Systems, devices, and methods for tracking and compensating for patient motion during a medical imaging scan

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example 1

[0355] Camera calibration

[0356] Like any camera lens, the lens used in the head tracker may have a certain degree of distortion due to the distance from the imaging axis. The azimuth distortion should be negligible, but the radial distortion can be measured after the lens is installed and fitted to a polynomial curve to allow rapid compensation of the centroid position near the edge of the camera's field of view. During the use of the NewtonRaphson iterative algorithm, a 6DOF expansion algorithm can be constructed to adapt to the typical level of radial distortion as a second-order compensation.

[0357] The radial distortion can be determined by printing fiducial targets with concentric circles with diameters of 1 / 3", 2 / 3", 1" (and so on up to the maximum diameter of 4 inches), such as Figure 22A with 22B Shown. The approximate FOV of the camera and a 25mm lens at a working distance of 14.08 inches is 2"x2.67", as indicated by the inner rectangle printed on the target. The c...

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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.

Description

[0001] Citation of related applications [0002] This application is a PCT application, which requires the title "systems, devices and methods for tracking and compensating for patient motion during a medical imaging scan" filed on July 23, 2014. System, Equipment and Method)" U.S. Provisional Patent Application No. 62 / 028,194. This application relates to a system, devices and methods for tracking and compensating for patient motion during a medical imaging scan filed on January 23, 2014 (systems, devices and methods for tracking and compensating for patient motion during a medical imaging scan) "PCT Application No. PCT / US2014 / 012806, which requires the "systems, devices, and methods for tracking moving targets (systems, equipment and methods for tracking moving targets)" filed on March 14, 2013 Priority of U.S. Patent Application No. 13 / 831,115, and a request for U.S. Provisional Patent Application No. 61 entitled "six degrees of freedom optical tracker" filed on January 24, 201...

Claims

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Application Information

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IPC IPC(8): A61B5/055A61B5/00
CPCA61B5/055A61N5/1049A61B2090/3937G06T7/292A61B34/20A61B2034/2055A61B5/1127A61B5/0077A61B5/721G06T2207/30204G06T7/248G06V40/20G06T7/0012
Inventor 杰弗里·N·于威廉·赫尔曼·艾美达约翰·亚瑟·洛夫贝格小江·杰森·潘迈克尔·恩格尔曼
Owner KINETICOR
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