DETECTION OF THE POSITION OF A MOVING OBJECT AND TREATMENT METHOD

• US 20120123251A1
• Filed: 01/20/2012
• Published: 05/17/2012
• Est. Priority Date: 12/13/2007
• Status: Active Grant

• Current Assignee: Brainlab AG
• Original Assignee: Brainlab AG
• Inventors: Berlinger, Kajetan, ERBEL, Stephan, Fürst, Armin
• Granted Patent: US 9,730,654 B2
• Time in Patent Office: Days
• US Class Current: 600/424
• CPC Class Codes: A61B 6/025 Tomosynthesis
• CPC Class Codes: A61B 6/0492 using markers or indicia for aiding patient positioning
• CPC Class Codes: A61N 2005/1051 using an active marker
• CPC Class Codes: A61N 2005/1059 using cameras imaging the patient
• CPC Class Codes: A61N 5/1049 for verifying the position of the patient with respect to the radiation beam
• CPC Class Codes: A61N 5/1065 Beam adjustment
• CPC Class Codes: G06T 11/008 Specific post-processing after tomographic reconstruction, e.g. voxelisation, metal artifact correction
• CPC Class Codes: G06T 2207/10048 Infrared image
• CPC Class Codes: G06T 2207/10076 4D tomography; Time-sequential 3D tomography
• CPC Class Codes: G06T 2207/10112 Digital tomosynthesis [DTS]
• CPC Class Codes: G06T 2207/10124 Digitally reconstructed radiograph [DRR]
• CPC Class Codes: G06T 2207/30096 Tumor; Lesion
• CPC Class Codes: G06T 2207/30204 Marker
• CPC Class Codes: G06T 2211/412 Dynamic
• CPC Class Codes: G06T 7/0012 Biomedical image inspection
• CPC Class Codes: G06T 7/246 using feature-based methods, e.g. the tracking of corners or segments
• CPC Class Codes: G06T 7/33 using feature-based methods

Abstract

The invention relates to a method for determining the position of an object moving within a body, wherein the body is connected to markers, a movement signal is determined based on the measured movement of the markers, images are taken from the object using a camera or detector, wherein the camera or detector is moved with respect to the object, it is determined from which direction or range of angles or segment the most images corresponding to a pre-defined cycle of the movement signal are taken, and using at least some or all of the images of the segment containing the most images for a specified movement cycle, an image of the object is reconstructed.

Claims

1-15. -15. (canceled)

16. A method for determining the state of a moving body, wherein a dataset of the moving body including several images taken at different times is compared to a second dataset or image sequence of the body to find the best correspondence between the first dataset and the second dataset,

wherein the first dataset is taken with the same frequency as the second dataset or one of the first and second frequencies is a multiple of the other frequency.

17. The method according to the claim 16, wherein the second dataset is shifted with respect to the first dataset in time to determine a correlation or matching value.

18. The method according to claim 16, wherein the first dataset is a 4D computer tomography (CT) dataset.

19. The method according to claim 16, wherein a digital reconstructed radiograph (DRR) is reconstructed from each three-dimensional dataset of the 4D CT.

20. The method for determining the parameters of a treatment of an object moving within a body, wherein

a movement indication is provided and treatment bins are generated using the method for determining the state of a moving body according to claim 16.

21. The method according to claim 20, wherein a synthetic treatment bin is generated by morphing or interpolation of two bins.

22. The method according to claim 20, wherein the treatment is radiation therapy.