A multi-view stereoscopic vision body surface positioning tracking method

A multi-eye stereoscopic vision and body surface technology, applied in image analysis, instruments, calculations, etc., can solve the problems of inability to guarantee the consistency of human body positioning, high equipment costs, and inability to monitor in real time, achieving low equipment costs and fast fusion , the effect of accurate registration results

Active Publication Date: 2019-05-07
JIANGSU RAYER MEDICAL TECH GO LTD
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Problems solved by technology

[0004] X-ray shooting and positioning can quickly obtain high-precision human body positioning information before radiotherapy, but in this way, patients need to bear additional X-ray radiation damage, and cannot be monitored in real time during the entire treatment process, and the accuracy of human body positioning cannot be guaranteed. Consistency, and the cost of equipment in this way is relatively high

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  • A multi-view stereoscopic vision body surface positioning tracking method
  • A multi-view stereoscopic vision body surface positioning tracking method
  • A multi-view stereoscopic vision body surface positioning tracking method

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Embodiment Construction

[0036] The present invention will be further described below in conjunction with specific drawings and embodiments.

[0037] In order to make those of ordinary skill in the art better understand the present invention, at first some concepts therein are explained:

[0038] (1) Active triangulation: the controllable light point, light bar or light surface structure is projected by the light source, and the light forms characteristic points, lines or surfaces on the surface of the object, and the image is captured by the imaging system, according to the calibrated spatial direction and position Parameters, using the triangulation principle to calculate the three-dimensional coordinates of the surface points of the object, the general surface structured light triangulation has the highest efficiency and accuracy.

[0039] (2) Passive triangulation: Use the scene light to use two or more cameras to form a certain angle to shoot the object, and calculate the three-dimensional coordi...

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Abstract

The invention provides a multi-view stereoscopic vision body surface positioning tracking method. The multi-view stereoscopic vision body surface positioning tracking method comprises the following steps that S1, calibrating cameras in each group of vision assemblies; S2, performing simulation geometric reconstruction on the CT data: during reconstruction, retaining point cloud data and target point information of a body surface in the CT data, and simulating a spatial position of the CT point cloud data in a left camera coordinate system; S3, collecting body surface point cloud data through visual components on the two sides of the treatment bed; S4, projecting grating stripes to the surface of the human body by each group of structured light projectors, and modulating the phases of the grating stripes; Carrying out phase splitting by a computer; Obtaining three-dimensional information of the body surface; S5, fusing the point cloud data collected on the two sides of the body surface;And S6, performing three-dimensional accurate registration on the collected and fused body surface point cloud data and CT reconstructed body surface point cloud data. The multi-view stereoscopic vision body surface positioning tracking method has no radiation damage to human bodies and is low in equipment cost.

Description

technical field [0001] The present invention relates to the field of image-guided radiation therapy (abbreviation: IGRT), in particular to a method for positioning and tracking a body surface with multi-eye stereo vision. Background technique [0002] Tracking of human body positioning before radiotherapy and real-time monitoring of human body positioning during treatment. Currently, X-ray shooting and positioning methods are used; [0003] The method of adopting X-ray shooting and positioning has a function similar to that of the present invention; this method mainly utilizes the X-ray tube to generate X-rays through high-voltage ionization, penetrates the human body and projects them onto the imaging flat panel, and uses image processing technology to combine CT scan data with Accurate registration of X-ray imaging to obtain current patient positioning information; [0004] X-ray shooting and positioning can quickly obtain high-precision human body positioning information...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/33G06T7/73G06T7/60G06T7/80
Inventor 梅建辉马善达付东山
Owner JIANGSU RAYER MEDICAL TECH GO LTD
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